Yes, CBD can make some dogs sleepy or lethargic, but it does not reliably act as a sedative. Some dogs become calmer after CBD, while others show no change in activity or sleep. Sleepiness can also point to a high dose, THC contamination, poor product quality or an interaction with another medication.
A 2021 study of healthy adult dogs found that CBD doses of up to 4.5 mg/kg per day did not change overall activity, rest, running, walking or sleep quality. That suggests sleepiness is possible, but it is not a predictable effect of CBD.
| Question | Short answer |
|---|---|
| Can CBD cause sleepiness in dogs? | Yes, in some dogs |
| Does CBD always make dogs sleepy? | No |
| Is sleepiness a normal desired effect? | Not necessarily |
| Should you give more if it does not work? | No. Ask your veterinarian first |
| Is CBD FDA-approved for dogs? | No |
Why Can CBD Make a Dog Sleepy?
Reported CBD side effects in dogs include somnolence, lethargy, sedation, vomiting, diarrhea and behavioral changes. Cornell University College of Veterinary Medicine lists sedation as one of the side effects owners report most often.
Research does not show that CBD consistently makes dogs sleep. A dog may become sleepy after taking CBD, but sleepiness is not a dependable sign that the product is working.
When Is Sleepiness More Concerning?
Mild tiredness can occur after CBD. Contact a veterinarian promptly if your dog is:
- Difficult to wake
- Unable to walk normally or unusually uncoordinated
- Vomiting repeatedly
- Drooling heavily
- Trembling or having seizures
- Agitated, confused or unusually sensitive to touch
- Having urinary accidents along with severe lethargy
Merck Veterinary Manual reports lethargy and ataxia in some cases of CBD exposure. Large amounts, THC contamination and inaccurate product labels may contribute to these signs.
The FDA also lists lethargy, depression, drooling, vomiting, agitation, tremors and convulsions among possible signs of cannabis exposure in pets. If these symptoms appear, contact your veterinarian, an emergency animal hospital or an animal poison control center.
Can CBD Sleepiness Be THC Intoxication?
Yes. Pure CBD is not intoxicating in the same way as THC. A dog that is extremely sleepy, wobbly, disoriented or trembling may have consumed THC or a contaminated product rather than experiencing a mild CBD effect.
Pet CBD products can vary in their actual cannabinoid content. Some have been found to contain inaccurate amounts or contaminants. Do not assume that a stronger reaction means the CBD is working better.
What Should You Do If CBD Made Your Dog Sleepy?
- Do not give another dose until you have spoken with your veterinarian.
- Keep your dog in a safe area away from stairs, water and other hazards.
- Check whether the product contains THC or other active ingredients.
- Record the product name, concentration, amount given and time of administration.
- Contact your veterinarian if the sleepiness is pronounced, persistent or accompanied by other symptoms.
CBD may interact with medications because it can affect liver enzymes involved in drug metabolism. Veterinary guidance matters especially if your dog takes seizure medication, sedatives, pain medication or other regular prescriptions.
Is CBD Safe for Dogs?
The FDA has not approved CBD for any use in animals. It cannot guarantee the safety, effectiveness or consistency of products marketed for pets.
Speak with your veterinarian before giving your dog CBD, particularly if you are considering it for anxiety, pain, seizures or sleep problems. If your dog becomes unusually drowsy or uncoordinated after taking CBD, do not give another dose and contact a veterinarian.