Alcohol poisoning in dogs: symptoms and first aid

Overview

Poisoning affects the whole body

Alcohol poisoning can involve significant central nervous system depression rather than temporary stumbling alone. Other dangerous changes include low temperature, low glucose and metabolic acidosis, meaning body acidification. Alcohol is rapidly absorbed from the gastrointestinal tract. Skin absorption is also possible, so exposure need not involve drinking.

The alcohols most commonly involved in pet poisoning are ethanol, methanol and isopropanol. Ethanol is the alcohol in alcoholic drinks. Exact composition determines assessment because an everyday product name does not establish which alcohol it contains.

Product alcohol concentration

Hand sanitiser may contain around 60–90% alcohol, making it much stronger than drinks. Beer commonly contains around 3.5–5%. Wine contains around 5.5–16%. Spirits may contain around 35–50%. Even mouthwash may contain around 14–27%. Average concentrations for a product group do not replace the actual label in risk assessment.

Causes

Drinks, household products and fermenting foods

Ethanol may occur in hand sanitisers, liquid medicines, fragrances, mouthwash and vanilla extract. Alcohol-filled chocolates can also be a source. Methanol occurs particularly in windscreen washer fluid. Isopropanol is used in skin-cleansing alcohol products and some hand sanitisers.

In a dog eating raw bread or pizza dough, yeast ferments carbohydrates in the stomach and produces ethanol and carbon dioxide. The warm, moist stomach favours fermentation. Poisoning has also been described after spoiled apples.

Why do consciousness, temperature and glucose change?

Ethanol crosses the blood–brain barrier into brain tissue. Alcohols and their metabolites disrupt neurotransmitters and depress the central nervous system. Acidic intermediate products can acidify the body. Vasodilation and impaired temperature regulation promote cooling. Alcohol can inhibit new glucose production by the liver, causing hypoglycaemia.

Liver metabolism and elimination

The liver converts ethanol into acetaldehyde and then acetic acid. Isopropanol is metabolised to acetone. Both original alcohol and metabolites leave in urine. Acetaldehyde can also alter release of catecholamines affecting the heart.

Risk factors

A common exposure is an unattended drink your dog can taste. Milk- or cream-containing alcoholic drinks may be particularly attractive. Parties increase the opportunity because drinks are easily left within reach.

The amount needed to cause poisoning depends on ethanol concentration. Isopropanol is around twice as toxic as ethanol. Damaged skin can increase ethanol absorption. Heavy application of an alcohol-based external product can therefore cause poisoning. Dough poisoning particularly affects dogs because of indiscriminate eating.

Low glucose after hand sanitiser exposure is a particular concern in small and young pets. Exposure can involve spilled fluid or a chewed bottle.

Typical symptoms

Signs generally begin within 30–60 minutes of ingestion. Drink-related effects may appear within 30 minutes or sooner. Intoxication from dough may instead take several hours. Signs include:

• Staggering, stumbling and difficulty walking straight.
• Unusual sleepiness, weakness and remaining recumbent.
• Vomiting, diarrhoea or profuse drooling.
• Confusion, unusual vocalisation and tremors.
• Cooling and slower breathing.
• Abdominal swelling and unproductive retching after raw dough.

Severe poisoning can cause coma or seizures. Heart rate can also slow. Ethanol can directly irritate the stomach and cause vomiting. Vomiting therefore does not establish that all alcohol has been removed.

Complications and consequences

Breathing, glucose and aspiration

Respiratory depression, severe hypothermia, hypoglycaemia and acidosis can be fatal. Low glucose can cause seizures and unconsciousness. Inhaling vomit can cause aspiration pneumonia. Risk increases when alcohol slows the muscles controlling the epiglottis.

Mechanical danger from yeast dough

Expanding dough can stretch the stomach enough to impair wall circulation. Severe distension can also impair breathing. Dough can predispose dogs to gastric dilatation and volvulus, a separate life-threatening condition. A large dough mass can also obstruct the digestive tract.

Recovery outlook

Most ethanol-exposed animals recover within 12–24 hours. The outlook is generally good with appropriate treatment and monitoring. Aspiration, other ingested substances or previous disease make prognosis more guarded. An intoxicated dog is also more vulnerable to accidents.

Diagnosis at the vet

Exposure history guides investigation

Diagnosis generally relies on known exposure and compatible signs. Your vet needs the substance and an estimated amount. Dough ingestion is investigated even without a witnessed drinking incident.

Glucose measurement looks for hypoglycaemia. Blood tests also assess acid–base balance and possible acidosis. Heart rate, rhythm, blood pressure and temperature are monitored. Severe cases also have blood oxygen saturation measured.

Alcohol measurement and abdominal imaging

Blood alcohol can confirm diagnosis but is not measured in most patients. Peak blood concentrations generally occur around 1.5–2 hours. Dough ingestion may require abdominal X-rays. Ethanol measurement may need a specialist laboratory.

Ethylene glycol and other central nervous system depressants can cause similar staggering or reduced consciousness. Other differentials include hypoglycaemia and diabetic ketoacidosis. With dough exposure, foreign body obstruction and gastric volvulus are also assessed.

Treatment

Breathing and circulation are secured first

A severely affected dog's vital functions are stabilised before other treatment. There is no specific antidote for alcohols. Care addresses breathing, circulation and acid–base disturbances. An unconscious dog may be intubated to protect the airway. Some severely poisoned patients need mechanical ventilation.

Intravenous fluids provide supportive care. Low glucose is corrected intravenously when needed. Temperature is supported and monitored. Arrhythmias are treated according to findings. Seizures may need medication. Antiemetics can reduce vomiting when aspiration risk is high. Your vet prescribes medicines and their use.

Inducing vomiting is unsuitable once signs develop

Inducing vomiting may be considered only after very recent exposure before signs appear. Rapid absorption leaves a short window for potential benefit. It is not recommended in a symptomatic dog. Activated charcoal binds ethanol poorly and is not routine ethanol poisoning treatment. In a vomiting, drowsy patient, charcoal aspiration is another danger.

Removing dough or skin contamination

Dough remaining in the stomach may need removal by lavage. Cold water may slow yeast fermentation only temporarily. The most effective water volume for this is unknown. Temperature is monitored because cold water can increase hypothermia risk. Rarely, surgical dough removal is needed. Gastric volvulus or persistent dough obstruction may require surgery. Life-threatening changes in a symptomatic dough patient are treated before removal attempts.

Alcohol products on the skin can be washed away with mild shampoo. Washing also reduces ingestion from coat licking. Severe ethanol poisoning may prompt haemodialysis, which cleans blood through an external machine.

Signs determine the care setting

Marked central nervous system depression, seizures, acidosis or hypoglycaemia requires hospital monitoring. A mildly affected dog may be monitored at home after veterinary assessment. Dough poisoning follow-up may include repeat blood tests and X-rays.

Prevention

Keep drinks out of reach during parties too, when they are easily left unattended. Creamy or sweet alcohol is not a dog treat even if its smell is attractive. Store hand sanitisers, mouthwash and alcohol-containing extracts where your dog cannot lick them.

Keep rising yeast dough in a closed place out of reach. This includes bread, roll and pizza dough. Keep fermenting or spoiled fruit inaccessible because it can provide ethanol exposure. Check whether a substance is poisonous for other household risks.

Do not leave sanitiser bottles in an open bag or rucksack your dog can search. Dried sanitiser on your hands does not prevent stroking your dog. Keeping the bottle out of reach prevents actual drinking exposure.

Important for dog owners

Prevent further exposure and keep your dog calm while awaiting instructions. Identify the product and possible amount swallowed for the call. Also report raw dough ingestion because the stomach may need examination.

Do not give anything orally or induce vomiting without your vet's explicit instructions. Delayed onset after dough does not make waiting safe. Agree monitoring that will identify deteriorating breathing, cooling and altered consciousness.

Record the possible exposure time too, as this helps assess urgency and decontamination. A small lick from hands generally causes no harm in most pets, but drinking from a bottle is different exposure.

Frequently asked questions

What if my dog drank beer or wine?

Contact your vet immediately and establish the possible amount. Ethanol effects from drinks can begin within 30 minutes. Do not induce vomiting yourself: it is not recommended in a symptomatic dog and vomit can enter the airways.

Can raw dough intoxicate a dog?

Yes. Yeast produces ethanol and carbon dioxide in the stomach. A dog can therefore have both alcohol poisoning and dangerous stomach distension. Signs may take hours, so contact your vet immediately rather than waiting for staggering.

Does activated charcoal help alcohol poisoning?

Charcoal binds ethanol poorly and is not generally used for ethanol poisoning. A vomiting, drowsy dog may also aspirate it. Your vet assesses whether another simultaneously ingested substance changes treatment; do not give charcoal yourself.

How quickly will my dog recover?

The usual recovery time after ethanol exposure in animals is 12–24 hours. Severe poisoning may nevertheless need hospital care and breathing support. Aspiration, other substances and pre-existing disease worsen the outlook, so this interval is not a reason to wait at home.

Can poisoning occur without licking the product?

Yes. Alcohol can also be absorbed through skin. Ethanol absorption is particularly possible through damaged skin. Washing contamination away can reduce both direct absorption and exposure from coat licking. A symptomatic dog also needs veterinary assessment.