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Ammonia

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

Ammonia is a colorless, strong-smelling chemical compound with the formula NH₃, which can be highly toxic to humans and animals in concentrated form. At room temperature, ammonia exists as a gas and dissolves easily in water. Many household cleaners contain ammonia in various concentrations, with so-called “all-purpose cleaners” potentially being up to 25% ammonia solutions. These highly concentrated solutions are corrosive and toxic.

The toxicity of ammonia is based on its strongly basic properties (pH value of about 11–12 in concentrated solution), which can lead to chemical burns, as well as its ability to interfere with metabolism. The mucous membranes of the respiratory tract, the eyes, and the digestive tract in case of oral ingestion are particularly at risk. Ammonia has a strong corrosive effect on moist body surfaces and can cause profound tissue damage.

Dogs and cats are particularly sensitive to ammonia poisoning due to their body size and physiological characteristics. Cats often show more severe symptoms than dogs with comparable exposure, due to their lower body weight and specific metabolic properties.

The most important facts at a glance

The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning largely depends on the severity of exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats., the concentration of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction., the time until therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. begins, and the affected organ system.

In cases of mild poisoning with predominantly local irritation, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is generally good. Most animals recover completely within a few days if adequate therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. is initiated.

In cases of moderate poisoning involving the lower respiratory tractThe respiratory tract includes the organs and structures involved in the breathing process, including the nose, pharynx, larynx, trachea, bronchi, and lungs., the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. should be guarded. Healing can take weeks, and there is a risk of secondary infections or the development of chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. bronchitis.

Severe poisoning with pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. edemaAn edema is a buildup of fluid in the body's tissues, leading to Swelling. Edema can be localized or generalized and is often a sign of an underlying condition., respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. failure, or extensive chemical burns of the digestive tract has a poor prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop.. Even if the acuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. phase is survived, long-term consequences such as Scar tissue formation in the lungs with chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. restriction of lung function, stricturesStrictures are pathological narrowings of tubes or ducts in the body that impede the normal flow of fluids or other substances. In dogs and cats, strictures can occur in the urethra, esophagus, or bile ducts and require medical treatment. in the digestive tract, or permanent eye damage may persist.

Aftercare includes:

Regular follow-up examinations to assess healing
Repeated chest X-rays for severe respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. symptoms
Adjustment of medication depending on the course of healing
Airway physiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques. if needed
Dietary measures for chemical burns of the digestive tract
Long-term monitoring of lung function in severe cases

For the preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. of further incidents, pet owners should be educated on the safe storage and use of products containing ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction.. Alternative, more pet-friendly cleaning agents can be recommended.

Causes, development and progression

“All-purpose cleaner”, for example, is a 25% ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. solution and is highly toxicToxic means "poisonous" and refers to substances that can have harmful effects on the body, including damage to organs, cells, or disruption of metabolic processes. and corrosive.

AmmoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning in pets can occur in several ways. The most common routes of exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats. are:

InhalationInhalation is the act of breathing air or other substances into the lungs through the nose or mouth. In dogs and cats, inhalation of toxins, smoke, or allergens can lead to respiratory problems. of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. vapors is the most common route of exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats.. This can happen during cleaning with products containing ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. in poorly ventilated rooms. Situations where ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. is mixed with cleaners containing chlorine are particularly dangerous, as this can create highly toxicToxic means "poisonous" and refers to substances that can have harmful effects on the body, including damage to organs, cells, or disruption of metabolic processes. chloramines.

OralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. intake is less common, as the pungent smell is usually a deterrent for animals. Nevertheless, dogs that drink from toilet bowls may ingest ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. residue if toilet cleaners were used previously. Licking paws after Contact with cleaned surfaces can also lead to oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. intake.

Skin contact with concentrated ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. solutions can lead to chemical burns. The paw pads are particularly sensitive when animals walk over freshly cleaned, still damp surfaces.

Eye contact can occur from splashes during cleaning or if animals touch their eyes with contaminatedContaminated describes something that has been polluted by harmful microorganisms, chemicals, or other dangerous substances. In veterinary medicine, this can affect food, water, toys, or the environment. paws, leading to severe irritation or even chemical burns.

In addition to household cleaners, there are other often-overlooked sources of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction.:

Insufficiently cleaned litter boxes, where ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. forms due to bacterial decomposition of ureaUrea, also known as carbamide, is a waste product of protein metabolism in the body. It's formed in the liver and excreted by the kidneys in urine. The urea level in the blood indicates kidney function.
Agricultural sources such as slurry and certain fertilizers
Poorly maintained aquariums, where ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. can accumulate through biological processes
Industrial sources in the vicinity of residential areas

The pungent odor makes it unattractive for animals, so drinking is unlikely.
However, dogs accustomed to drinking from the toilet bowl could also ingest ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. residues orally.
Licking paws after contact and inhaling fumes are the main sources of unintentional ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats..

Mechanism of action

The toxic effect results from both local action and systemic effects after absorptionAbsorption refers to the uptake of substances by living cells or tissues. In the context of veterinary medicine, it often refers to the absorption of nutrients, drugs, or toxins from the digestive tract into the bloodstream..
AmmoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. has a strong corrosive effect locally on moist body surfaces such as eyes, skin, lungs, and the mucous membranes of the oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. cavity and gastrointestinalGastrointestinal refers to the gastrointestinal tract, a system that extends from the oral cavity to the anus and is responsible for the digestion of food and the absorption of nutrients. tract.
This effect is independent of whether ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. was inhaled or ingested orally.
After absorptionAbsorption refers to the uptake of substances by living cells or tissues. In the context of veterinary medicine, it often refers to the absorption of nutrients, drugs, or toxins from the digestive tract into the bloodstream., ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. affects one of the body’s most important metabolic processes, the citric acid cycle, which is responsible for the metabolism of carbohydrates, fats, and proteins.
MetabolicMetabolic refers to metabolism, i.e. the entirety of chemical processes that take place in a living organism to enable life processes. Metabolic disorders can cause a variety of Diseases in Dogs and cats. processes change, leading to increased acid (lactate) production, resulting in acidosisAcidosis is a condition in which the pH value in the body is too acidic, either due to an increase in acid or a loss of bases. In dogs and cats, acidosis can occur due to renal failure, diabetes, or other metabolic disorders. (lactic acidosisAcidosis is a condition in which the pH value in the body is too acidic, either due to an increase in acid or a loss of bases. In dogs and cats, acidosis can occur due to renal failure, diabetes, or other metabolic disorders.).
This causes cell damage and damage to the CNSCNS stands for the central nervous system, which consists of the brain and the spinal cord. It is responsible for processing information and controls many functions of the body..

Symptoms of intoxication

Inhaled in low concentrations, ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. causes

Burning in the eyes
Tearing
Irritation of the nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. mucous membranes
Sneezing
Cough
Throat irritation

In high concentrations, even a few breaths can lead to severe respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. symptoms.

severe irritation
LaryngospasmA laryngospasm is a sudden spasm of the laryngeal muscles that leads to a temporary narrowing or blockage of the airways. This can cause shortness of breath and a feeling of suffocation. (spasm of the larynxThe larynx is an organ in the upper respiratory tract that contains the vocal cords and is important for speaking, breathing, and swallowing. The larynx also serves as a protective mechanism that prevents food and liquid from entering the trachea.)
Shortness of breath
Inflammation to chemical burns
toxicToxic means "poisonous" and refers to substances that can have harmful effects on the body, including damage to organs, cells, or disruption of metabolic processes. pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. edemaAn edema is a buildup of fluid in the body's tissues, leading to Swelling. Edema can be localized or generalized and is often a sign of an underlying condition.
respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. insufficiencyInsufficiency refers to the inadequate function or performance of an organ or system. This can include, for example, heart failure, kidney failure, or venous insufficiency.
HypoxiaHypoxia refers to a condition in which the body or a part of the body is not supplied with enough oxygen. This can lead to various symptoms, including shortness of breath, confusion, and in severe cases, organ failure.
acuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. lung failure
Unconsciousness

With oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. ingestionIngestion refers to the intake of substances through the mouth and their delivery to the digestive tract. In dogs and cats, the ingestion of toxic substances, foreign objects, or incompatible foods can lead to health problems.

Vomiting, sometimes bloody
severe abdominalThe term "abdominal" refers to anything that concerns the belly or the abdomen. It is an adjectival expression used to describe the location, symptoms, or conditions that occur in the abdominal area. pain

Supplements

The symptomatologySymptomatology refers to the entirety of symptoms associated with a particular disease or condition. It describes how a disease manifests itself externally. of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning varies depending on the route of exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats., concentration, and duration of effect. Basically, a distinction is made between symptoms following inhalationInhalation is the act of breathing air or other substances into the lungs through the nose or mouth. In dogs and cats, inhalation of toxins, smoke, or allergens can lead to respiratory problems. and those following oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. intake.

When inhaling low ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. concentrations, affected animals show:

Burning in the eyes with increased tear production
Irritation of the nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. mucous membranes with sneezing and nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. discharge
Coughing and retching
Restlessness and behavioral changes
Increased respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate
Drooling

With inhalationInhalation is the act of breathing air or other substances into the lungs through the nose or mouth. In dogs and cats, inhalation of toxins, smoke, or allergens can lead to respiratory problems. of high ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. concentrations or prolonged exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats., more severe symptoms may occur:

Severe shortness of breath with wheezing or rattling breath sounds
LaryngospasmA laryngospasm is a sudden spasm of the laryngeal muscles that leads to a temporary narrowing or blockage of the airways. This can cause shortness of breath and a feeling of suffocation. (laryngeal spasm)
CyanosisCyanosis refers to a bluish discoloration of the skin and mucous membranes, caused by an inadequate oxygen supply to the blood. It can be a sign of heart, lung, or blood diseases. (bluish discoloration of the mucous membranes)
Development of toxicToxic means "poisonous" and refers to substances that can have harmful effects on the body, including damage to organs, cells, or disruption of metabolic processes. pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. edemaAn edema is a buildup of fluid in the body's tissues, leading to Swelling. Edema can be localized or generalized and is often a sign of an underlying condition. with frothy nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. discharge
RespiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. insufficiencyInsufficiency refers to the inadequate function or performance of an organ or system. This can include, for example, heart failure, kidney failure, or venous insufficiency.
HypoxiaHypoxia refers to a condition in which the body or a part of the body is not supplied with enough oxygen. This can lead to various symptoms, including shortness of breath, confusion, and in severe cases, organ failure. with impaired consciousness leading to unconsciousness
Seizures due to lack of oxygen in the brain

Excessive salivation
Chemical burns of the oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. mucous membrane with redness, swelling, and ulcerations
Vomiting, sometimes with blood
Severe abdominalThe term "abdominal" refers to anything that concerns the belly or the abdomen. It is an adjectival expression used to describe the location, symptoms, or conditions that occur in the abdominal area. pain, recognizable by a tense abdominalThe term "abdominal" refers to anything that concerns the belly or the abdomen. It is an adjectival expression used to describe the location, symptoms, or conditions that occur in the abdominal area. wall and expressions of pain
DiarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems., possibly with blood
Difficulty swallowing
DehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse.

In the case of skin contact, local chemical burns with redness, Swelling, and blistering can occur. Eye contact leads to severe conjunctivitis, corneal damage, and intense tearing.

Diagnosis

The diagnosis of ammonia poisoning is primarily based on the anamnesis and the clinical picture. Crucial information includes possible contact with ammonia-containing substances and the characteristic symptoms.

During the clinical examination, the veterinarian pays particular attention to:

RespiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate and pattern
AuscultationAuscultation is an examination method in which the doctor uses a stethoscope to listen to the sounds in the body, especially in the heart, lungs, and intestines, in order to obtain information about the state of health. of the lungs to detect crackles or dullness
Mucous membrane color to assess oxygen supply
Examination of the oral cavity for chemical burns if oral ingestionIngestion refers to the intake of substances through the mouth and their delivery to the digestive tract. In dogs and cats, the ingestion of toxic substances, foreign objects, or incompatible foods can lead to health problems. is suspected
Assessment of hydration status

To confirm the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and assess the severity, the following diagnostic measures may be useful:

Imaging procedures:

Thoracic X-rays to assess lung parenchyma and detect pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. edemaAn edema is a buildup of fluid in the body's tissues, leading to Swelling. Edema can be localized or generalized and is often a sign of an underlying condition.
In severe cases, a computed tomography (CT) scan can be helpful for detailed visualization of lung changes

Laboratory diagnostics:

Blood gas analysis to assess respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. function and acid-base balanceThe acid-base balance refers to the equilibrium between acids and bases in the body, which is important for maintaining the physiological pH in the blood and other bodily fluids. Imbalances can lead to serious health problems.
Blood count to detect inflammatory reactions
Clinical-chemical examinations to assess organ functions, especially liver and kidneys
In case of oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. ingestionIngestion refers to the intake of substances through the mouth and their delivery to the digestive tract. In dogs and cats, the ingestion of toxic substances, foreign objects, or incompatible foods can lead to health problems., determination of electrolytesElectrolytes are minerals in the body that carry an electric charge and perform vital functions such as regulating fluid balance, acid-base balance, and nerve and muscle activity. The main electrolytes include sodium, potassium, chloride, and magnesium. and kidney values

Endoscopic examinations:

In case of suspected severe chemical burns of the upper digestive tract, an endoscopic examination of the esophagusThe esophagus is a muscular tube that connects the pharynx to the stomach. It transports food from the mouth to the stomach through rhythmic contractions (peristalsis)., stomach, and duodenumThe duodenum is the first part of the small intestine directly after the stomach. It plays an important role in digestion, as digestive juices from the pancreas and gallbladder act here. may be indicated
BronchoscopyBronchoscopy is a diagnostic and therapeutic procedure in which the inside of the airways is directly viewed with a bronchoscope, a thin, flexible viewing tube. It can be used to take tissue samples or remove foreign objects. to assess the airways in severe respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. symptoms

The differential diagnosisDifferential diagnosis is the process of weighing two or more conditions that cause similar symptoms to determine the specific cause of a patient's symptoms. includes other intoxications with corrosive substances, acuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. bronchitis, pneumonia, bronchial asthma, foreign body aspiration, and allergic reactions.

Therapeutic principles

There is no antidoteAn antidote is a substance used to neutralize or reverse the harmful effects of poisoning or a drug overdose. Antidotes can be specific to certain poisons or have more general detoxifying effects..
In severe ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning, life-saving emergency resuscitationResuscitation includes measures to revive animals after a cardiac arrest or severe respiratory depression. These may include chest compressions and artificial respiration. measures may be necessary.
This means:

Check breathing, if absent →
Chest compressions (30x)
Ventilation (2x)

Immediate measures include decontaminationDecontamination refers to the removal of toxic substances or pathogens from a living being, object, or environment to prevent or treat poisoning or infection.. Affected body parts (eyes, fur, paws) should be thoroughly cleaned. Eyes should be flushed for at least 15 minutes if possible.
For decontaminationDecontamination refers to the removal of toxic substances or pathogens from a living being, object, or environment to prevent or treat poisoning or infection. of fur or paws, generous and prolonged flushing with lukewarm water, or showering/bathing the animals, should be performed.
When bathing animals, remember to change the water.
If ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. has been swallowed, vomiting should not be induced; instead, dilution of the ammonia in the stomach should be attempted by administering warm water. This should be followed by repeated gastric lavageLavage is a rinsing procedure that uses a liquid to clean a body cavity, organ, or wound. In veterinary medicine, lavage can be used, for example, for gastric lavage or to clean an infected wound..
Symptomatic therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. then follows.
The focus is on lung function and thus the body’s oxygen supply.
Often, oxygen enrichment of the breathing air during spontaneous breathing or mechanical ventilation is necessary.
Special attention is paid to water, electrolyte, and acid-base balanceThe acid-base balance refers to the equilibrium between acids and bases in the body, which is important for maintaining the physiological pH in the blood and other bodily fluids. Imbalances can lead to serious health problems., as well as the treatment of pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. edemaAn edema is a buildup of fluid in the body's tissues, leading to Swelling. Edema can be localized or generalized and is often a sign of an underlying condition..

Supplements

The treatment of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning depends on the type of exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats., the severity of symptoms, and the time of veterinary presentation. There is no specific antidoteAn antidote is a substance used to neutralize or reverse the harmful effects of poisoning or a drug overdose. Antidotes can be specific to certain poisons or have more general detoxifying effects. for ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction., so symptomatic therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. is paramount.

Immediate measures and decontaminationDecontamination refers to the removal of toxic substances or pathogens from a living being, object, or environment to prevent or treat poisoning or infection.:
In case of skin contact, thorough flushing with lukewarm water for at least 15–20 minutes should be performed. Affected animals can be showered or bathed, with the water changed multipleMultiple means manifold or repeated and is used to describe conditions or events that occur in multiple instances or at different locations. In veterinary medicine, this may indicate multiple lesions, tumors, or other pathological changes. times. In case of eye contact, extensive flushing with physiological saline solution or water for at least 15–20 minutes is required.

Vomiting should not be induced after oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. intake, as this would lead to re-exposureRe-exposure refers to renewed Contact with an allergen, toxin, or pathogen after previous exposure. In dogs and cats, this can lead to a renewed or intensified reaction, especially in cases of allergies or sensitivities. of the esophagusThe esophagus is a muscular tube that connects the pharynx to the stomach. It transports food from the mouth to the stomach through rhythmic contractions (peristalsis). to the corrosive ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction.. Instead, dilution should be attempted by carefully administering water. In the hospital, gastric lavageLavage is a rinsing procedure that uses a liquid to clean a body cavity, organ, or wound. In veterinary medicine, lavage can be used, for example, for gastric lavage or to clean an infected wound. under general anesthesia may be considered.

Airway Management:

Oxygen therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. for the treatment of hypoxiaHypoxia refers to a condition in which the body or a part of the body is not supplied with enough oxygen. This can lead to various symptoms, including shortness of breath, confusion, and in severe cases, organ failure.
In severe respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress, intubation and mechanical ventilation may be necessary
BronchodilatorsBronchodilators are medications that widen (dilate) the bronchi, thereby making breathing easier. They are typically used to treat respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD). to widen the airways
InhalationInhalation is the act of breathing air or other substances into the lungs through the nose or mouth. In dogs and cats, inhalation of toxins, smoke, or allergens can lead to respiratory problems. therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. with humidified air to aid mucous membrane clearance

Medical TherapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions.:

CorticosteroidsCorticosteroids are a class of steroid hormones that occur naturally in the body and can also be produced synthetically. They have anti-inflammatory and immunosuppressive properties and are used in veterinary medicine to treat a variety of conditions. to reduce inflammatory response in the airways (controversial, as they can delay healing)
Antibiotics in case of suspected secondary infections
Analgesics for pain relief
Proton pump inhibitors or H₂ receptor antagonists for chemical burns of the digestive tract
Infusion therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. to stabilize circulation and correct electrolyte and acid-base imbalances

In severe cases, intensive care monitoring with regular checks of blood gases, acid-base balanceThe acid-base balance refers to the equilibrium between acids and bases in the body, which is important for maintaining the physiological pH in the blood and other bodily fluids. Imbalances can lead to serious health problems., and vital parameters may be required.

Prognosis & follow-up care

The prognosis of ammonia poisoning largely depends on the severity of exposure, the concentration of ammonia, the time until therapy begins, and the affected organ system.

In cases of mild poisoning with predominantly local irritation, the prognosis is generally good. Most animals recover completely within a few days if adequate therapy is initiated.

In cases of moderate poisoning involving the lower respiratory tract, the prognosis should be guarded. Healing can take weeks, and there is a risk of secondary infections or the development of chronic bronchitis.

Severe poisoning with pulmonary edema, respiratory failure, or extensive chemical burns of the digestive tract has a poor prognosis. Even if the acute phase is survived, long-term consequences such as Scar tissue formation in the lungs with chronic restriction of lung function, strictures in the digestive tract, or permanent eye damage may persist.

Aftercare includes:

Regular follow-up examinations to assess healing
Repeated chest X-rays for severe respiratory symptoms
Adjustment of medication depending on the course of healing
Airway physiotherapy if needed
Dietary measures for chemical burns of the digestive tract
Long-term monitoring of lung function in severe cases

For the prevention of further incidents, pet owners should be educated on the safe storage and use of products containing ammonia. Alternative, more pet-friendly cleaning agents can be recommended.

Research outlook

Current research in the field of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning in small animals focuses on several promising areas:

New therapeutic approaches for treating lung burns are being investigated, including the use of surfactant preparations to improve lung function in cases of toxic pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. edema. These substances could reduce surface tension in the alveoli and thus improve gas exchange.

In the field of regenerative medicine, the use of stem cell therapies to support tissue regeneration after severe chemical burns is being researched. InitialInitial means beginning or at the start. In medicine, it can refer to the first symptoms of a disease or the first phase of a treatment process. studies show promising results in the healing of mucosal damage.

Improved biomarkers for the early detection of organ damage could enable more precise prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. in the future. Specific inflammatory mediators and cell damage markers are being investigated for their diagnostic value in ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning.

The development of inhalationInhalation is the act of breathing air or other substances into the lungs through the nose or mouth. In dogs and cats, inhalation of toxins, smoke, or allergens can lead to respiratory problems. therapies with special combinations of active ingredients could optimize the local treatment of respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. damage. Formulations with mucolytic, anti-inflammatory, and epithelial-regenerating properties are the focus.

PreventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. is also supported by research into safer household cleaners. Manufacturers are working on products with reduced ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. content while maintaining cleaning performance, as well as child-safe and pet-safe packaging.

The long-term consequences of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning are being systematically recorded in follow-up studies to develop better rehabilitation protocols and to detect and treat chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. complications early.

Frequently asked questions (FAQs)

How do I identify ammonia-containing cleaning products?
Products containing ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. usually have a characteristic, pungent odor. Labels will include notes such as “contains ammonia,” “ammonium hydroxide,” or “spirits of ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction..” Look for hazard symbols and warning notices on the packaging.
How long should I observe my pet after ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning?
After mild poisoning, you should observe your pet for at least 24–48 hours, as pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. edemaAn edema is a buildup of fluid in the body's tissues, leading to Swelling. Edema can be localized or generalized and is often a sign of an underlying condition. can develop with a delay. In cases of severe poisoning, veterinary monitoring for several days is necessary.
What ammonia-free alternatives are there for household cleaning?
Vinegar, citric acid, baking soda, or special eco-friendly cleaners without ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. are good alternatives. These are less dangerous for pets and often just as effective.
Can a single exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats. to ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. fumes cause permanent damage?
Yes, even a single exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats. to high concentrations can lead to permanent lung damage. Situations in closed, poorly ventilated rooms are particularly dangerous.
Are cats or dogs more sensitive to ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction.?
Cats often react more sensitively to ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. vapors due to their specific respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. anatomyAnatomy is the scientific study of the structure of living things. It deals with the construction and organization of organisms, including their systems, organs, and tissues. and lower body weight. In addition, they spend more time grooming, which can lead to the oral ingestionIngestion refers to the intake of substances through the mouth and their delivery to the digestive tract. In dogs and cats, the ingestion of toxic substances, foreign objects, or incompatible foods can lead to health problems. of substances from their fur.
How can I prevent my pet from coming into contact with ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction.?
Store cleaning products in locked cabinets, ventilate thoroughly during and after cleaning, keep animals in other rooms during cleaning, and rinse cleaned surfaces well.
Can ammonia concentration in litter boxes become dangerous?
Yes, if cleaning is insufficient, ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. can form in litter boxes through the bacterial decomposition of ureaUrea, also known as carbamide, is a waste product of protein metabolism in the body. It's formed in the liver and excreted by the kidneys in urine. The urea level in the blood indicates kidney function.. This can lead to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. irritation. Regular cleaning and good ventilation are important.
What first aid measures can I take if ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning is suspected?
Take the animal into the fresh air immediately, rinse affected body parts with plenty of lukewarm water, and contact your veterinarian immediately. Do not try to induce Vomiting.
Are there long-term consequences after recovering from ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning?
After severe poisonings, chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. bronchitis, lung scarring with impaired lung function, stricturesStrictures are pathological narrowings of tubes or ducts in the body that impede the normal flow of fluids or other substances. In dogs and cats, strictures can occur in the urethra, esophagus, or bile ducts and require medical treatment. in the digestive tract, or corneal damage may remain.
How long does full recovery take after ammoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. poisoning?
In mild cases, recovery can occur within a few days. In moderate to severe poisoning, the healing process can take weeks to months, and regular veterinary check-ups are required.

Literature

Dodd, K. T., & Gross, D. R. (1980). AmmoniaAmmonia is a nitrogenous waste product of protein metabolism in the body, mainly converted to urea in the liver and excreted via the kidneys. Elevated ammonia levels in the blood may indicate liver dysfunction. inhalationInhalation is the act of breathing air or other substances into the lungs through the nose or mouth. In dogs and cats, inhalation of toxins, smoke, or allergens can lead to respiratory problems. toxicityToxicity is the measure of a substance's harmfulness or poisonousness. Toxicity can vary depending on the dose, route of exposure, and individual sensitivity. in cats: a study of acute and chronic respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. dysfunctionDysfunction refers to an impaired or abnormal function of an organ or system in the body. This can be due to diseases, disorders, or damage and can affect the quality of life.. Archives of Environmental Health: An International Journal, 35(1), 6-14.
Dörfelt, R., & Richter, P. (2018). Poisoning with household cleaners in cats. Kleintierpraxis, (4), 176-186.
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Lee, J. A. (2021). DecontaminationDecontamination refers to the removal of toxic substances or pathogens from a living being, object, or environment to prevent or treat poisoning or infection. and treatment of common household toxicoses in dogs and cats. Veterinary Clinics of North America: Small Animal Practice, 51(6), 1299-1315. https://doi.org/10.1016/j.cvsm.2021.06.006
Mazzaferro, E. M. (2020). Small Animal Toxicological Emergencies. In Silverstein, D. C. & Hopper, K. (Eds.), Small Animal Critical Care Medicine (3rd ed., pp. 834-839). Elsevier.
Peterson, M. E. and Talcott, P. A. (2022). Small Animal Toxicology (4th ed.). Elsevier Health Sciences.
Wismer, T. A. and Means, C. (2018). Toxicology of Household Cleaning Products and Disinfectants. Veterinary Clinics of North America: Small Animal Practice, 48(6), 1019-1029. https://doi.org/10.1016/j.cvsm.2018.06.007