Drug Poisoning in Dogs: How It Happens and How To Prevent It

Multi-drug poisoning in dogs happens when a pet ingests more than one medication or toxin at the same time—leading to dangerous, unpredictable effects that can quickly become life-threatening.  

If you suspect your dog has consumed multiple substances, seek emergency veterinary care immediately. 

What Is Drug Poisoning in Dogs?

Drug poisoning in dogs occurs when a pup ingests, inhales, or absorbs a harmful amount of a medication—either human or veterinary—that negatively affects them and their body. The most common cause is unintentional overdosing of medications. 

Prescription pet medication is easily overconsumed by dogs, since it’s typically flavored to make it more appealing and easier to swallow. If these medications are kept in an accessible place, a pet will quickly and easily consume them.

Besides veterinary pills, the other common factor in drug poisoning is the administration of over the counter or prescription drugs by a pet parent without prior consultation from a veterinarian. Remember, the same drug dose given to a human can’t be given to an animal. Incorrect dosages will often result in overdosing and drug poisoning. 

Many over the counter and prescription medications used for people are toxic to dogs. Always consult your vet before offering any medications to your pet. 

Even as little as one dose of acetaminophen (Tylenol) can cause severe organ damage in a medium-sized dog.  

Because animals don’t have the natural enzymes necessary for detoxifying and eliminating drugs made for humans, medications like aspirin, ibuprofen, and acetaminophen are a major cause of poisoning in dogs. 

If your dog ingests any drugs at home that they should not have, do not induce vomiting there, as that can cause more serious problems such as aspiration pneumonia.  

Instead, contact your veterinarian or Pet Poison Helpline (855-764-7661) right away. 

Symptoms of Drug Poisoning in Dogs

If you suspect your dog has had access to medications, you will typically find evidence, whether it’s an empty container or a box that has been torn apart. You may need to look in your dog’s favorite hiding spots or out in the backyard. 

If your pet has begun vomiting before the entire pill or capsule has been digested, you may find whole pills or the undigested exterior of a capsule. If the medication was liquid, it will be more difficult to differentiate the liquid drug from the rest of the content in the vomit. 

The most useful information you can give your veterinarian is what type of drug you believe was ingested by your pet and approximately how much. 

Even if you are not entirely sure how much of the medication was ingested, your vet will have a point from which to begin treatment. 

Bring any information you can with you to the veterinarian, such as the medication container and any pills you can find. If you aren’t sure what drugs your dog might have gotten into, your vet can even send out a vomit sample to a special lab for toxicology testing. 

Common symptoms of medication poisoning in dogs include: 

• Vomiting 

• Diarrhea 

• Lethargy 

• Restlessness 

• Drooling 

• Agitation  

• Abdominal pain 

• Loss of appetite 

• Excessive salivation 

• Ataxia 

• Bloody urine 

• Trembling 

• Seizures 

• Weakness 

• Collapse  

Causes of Drug Poisoning in Dogs

The most common cause of drug poisoning in dogs is when a pup takes too much veterinarian-prescribed medication.  

However, a dog may be poisoned by human medications if they are not locked away. Common drugs that can cause poisoning in dogs include: 

• Antihistamines 

• Sleeping pills 

• Diet pills 

• Heart pills 

• Blood pressure pills 

• Ibuprofen 

• Acetaminophen 

How Veterinarians Diagnose Drug Poisoning in Dogs

To diagnose medication poisoning in dogs, your veterinarian will need to take a thorough history of your pet’s health, recent activities, and onset of symptoms. Then they will perform a physical exam on your dog. 

Your vet will likely recommend blood work and urine testing.  

Some drugs will affect the body quickly while others are slower. This initial blood sample will act as a baseline to monitor progression or improvement.  

Depending on your dog’s symptoms, X-rays of the chest or an ultrasound of the abdomen might be done as well.  

Treatment of Drug Poisoning in Dogs

Treatment of drug poisoning in dogs depends on what drugs were ingested and how much.  

The goal of treatment is to stabilize the dog and decontaminate and support the body while the toxins are cleared.   

With some drug poisonings, time is crucial and you dog should see a veterinarian as soon as possible to avoid lasting effects or worse.   

If the ingestion happened within a few hours and your dog is healthy otherwise, your vet might choose to induce vomiting to try to remove any of the toxin left in the stomach.  

Induced vomiting is often only successful when done within two to three hours of ingestion, and should always be done with your veterinarian.  

Your vet can also give medications like activated charcoal or barium to help coat the digestive system and help block any more of the drugs from being absorbed into your dog’s bloodstream.  

Dogs will often have to be hospitalized on IV fluids and other supportive care to flush their system of the ingested toxin.  

Recovery and Management of Drug Poisoning in Dogs

In most cases, recovery from drug poisoning in dogs requires both hospital and home care. 

Recovery might look different depending on the drug(s) ingested. 

Sometimes your dog might need strict crate rest. Other times, they may need a special diet.

At home, it’s important to continue all medications and treatments as recommended by your vet to ensure a timely and successful recovery.  

Keeping a close eye on your dog is also part of pet management. Look for any delayed complications from the drug poisoning.  

Most importantly, preventing re-exposure to the drugs is key. Keep all medications locked away and out of reach of your pup. 

Prevention of Drug Poisoning in Dogs

To prevent drug poisoning in dogs, ensure the following:  

• Restrict access to all medications (ex. keep them in a locked cabinet) 

• Use medications exactly as prescribed by your vet 

• Never give your dog any medications they were not prescribed  

• Keep pills in their child-proof bottle, not a pill container 

• Be diligent that medication doesn’t fall to the ground