Yes, kratom is toxic to dogs. Doses as low as 0.15 mg/kg of body weight have caused clinical signs in reported cases, and poison control calls involving kratom and pets have risen steadily over the past decade. Between 2014 and 2024, the ASPCA Animal Poison Control Center logged 128 dog exposures to kratom, with about 60% of those dogs developing symptoms that were likely caused by the substance.
Why Kratom Is Dangerous for Dogs
Kratom contains an active compound called mitragynine that binds to the same brain receptors as opioid drugs. In dogs, the liver processes mitragynine using the same enzyme family that humans rely on, and dogs are actually the closest species to humans in terms of that enzyme’s activity. This matters because during digestion, a dog’s gut and liver convert mitragynine into a much more potent byproduct that hits opioid receptors roughly 22 times harder than the original compound.
That conversion is what makes kratom particularly risky for dogs. Even a relatively small amount of kratom powder or leaf material can produce significant opioid-like effects once your dog’s body processes it.
Signs of Kratom Poisoning
The symptoms your dog shows depend on how much kratom was ingested. At lower doses, kratom acts more like a stimulant, causing agitation, restlessness, and a rapid heart rate. At higher doses, the opioid effects take over and the picture changes dramatically.
In the 128 dog cases tracked by the ASPCA, the most common signs were:
- Lethargy, weakness, or heavy sedation (about 36% of cases)
- Unusual vocalization such as whining or crying (about 20%)
- Excessive drooling or lip licking (about 16%)
Large doses can cause vomiting, stupor, and in severe cases, seizures. The Merck Veterinary Manual classifies the progression from stimulant-like signs at low doses to opioid sedation at higher doses as the typical pattern of kratom toxicosis in animals.
How Much Kratom Is Dangerous
There is no clearly defined lethal dose for dogs, which makes this substance unpredictable. Clinical signs have appeared at doses as low as 0.15 mg/kg, while some dogs have survived reported exposures as high as 5,878 mg/kg without dying. In tracked cases where doses were known, the median exposure was about 203.5 mg/kg.
That enormous range tells you something important: the threshold for harm varies widely between individual dogs, and there’s no “safe” amount. The form of kratom also matters. Concentrated extracts, capsules, and enhanced powders deliver far more of the active compound per gram than raw leaf material. A single spilled capsule could contain enough to affect a small dog.
Heavy Metal Contamination Adds Risk
Beyond the direct toxic effects of the plant itself, kratom products carry a secondary danger. FDA laboratory testing of 30 kratom products from various sources found significant levels of lead and nickel, at concentrations exceeding safe limits for daily oral intake. These metals accumulate in the body over time and can damage the kidneys and nervous system. For a dog that weighs far less than an adult human, even a one-time exposure to a contaminated product could deliver a proportionally large dose of these metals.
What Happens at the Vet
If your dog has eaten kratom in any form, the priority is getting them to a veterinarian quickly. Treatment is supportive, meaning the vet addresses symptoms as they appear rather than administering a specific antidote. For moderate to severe cases, this typically involves IV fluids to support organ function and close monitoring of neurological status. If seizures develop, anti-seizure medication is given intravenously.
Most dogs that receive prompt veterinary care survive kratom exposure. No deaths were reported among the 128 dog cases tracked between 2014 and 2024, though this likely reflects cases where owners sought help. The lack of reported fatalities does not mean the substance is safe.
Dogs on Medication Face Extra Risk
Kratom is processed by the same liver enzyme system that breaks down many common veterinary medications. If your dog takes any prescription drugs that are metabolized by the liver, kratom exposure could interfere with how those medications are processed, either amplifying their effects or slowing their clearance from the body. This is especially concerning for dogs on seizure medications, sedatives, or pain drugs, where even small shifts in blood levels can cause serious problems.
Common Exposure Scenarios
Dogs typically encounter kratom by getting into a owner’s supply of powder, capsules, or brewed tea. Kratom powder is sometimes sold in loosely sealed bags that a curious dog can easily tear open. Flavored kratom drinks or gummies may be especially attractive to dogs. The rising number of poison control calls, which peaked between 2021 and 2022, tracks closely with kratom’s growing popularity as a human supplement.
If you keep kratom in your home, store it in a sealed container in a location your dog cannot access. Treat it with the same caution you’d give any medication or supplement that could harm a pet.