CBD and gabapentin are sometimes used together in dogs, but only with veterinary approval and monitoring. A 12-week study of 21 dogs examined CBD in a pain-treatment plan that included gabapentin. That study does not show that the combination is safe or appropriate for every dog.
The FDA also sought information in January 2025 about the quality, drug interactions, adverse events, and toxicology of cannabis-derived products used in animals. Important safety and quality questions remain unresolved.
Do not add CBD, reduce gabapentin, or change the dosing schedule without speaking with your veterinarian first.
CBD and Gabapentin for Dogs: At a Glance
| Question | Practical answer |
|---|---|
| Can dogs receive both? | Sometimes, under veterinary supervision |
| Main immediate risk | Excessive sedation, lethargy, weakness, or unsteadiness |
| Other concern | CBD may affect liver enzymes and how medicines are processed |
| Is there one safe dose for every dog? | No. Product strength, body size, health, and other medicines matter |
| Should you stop gabapentin? | No. Do not stop it abruptly, especially if it is being used for seizures |
| When is it urgent? | If your dog is difficult to wake, collapses, has abnormal breathing, develops severe tremors, or may have consumed THC |
Why Can CBD and Gabapentin Cause Problems Together?
Gabapentin can cause sedation and poor coordination in dogs. Veterinary guidance recommends caution when cannabidiol, or CBD, is used with nervous-system depressants. Taking both may leave a dog unusually sleepy, weak, or unsteady.
CBD can also affect liver enzymes involved in processing medicines. As a result, it may change how gabapentin or another medicine affects an individual dog. The risk deserves extra attention if a dog has liver disease.
Tell your veterinarian about every prescription drug, supplement, herbal product, and CBD product your dog receives. Other medicines that may add to sedation include trazodone, opioids, benzodiazepines, phenobarbital, and some pain medicines.
Is There Evidence That Dogs Can Use Both?
Limited evidence shows that CBD and gabapentin have been used together in veterinary pain-treatment plans.
A 12-week study of 21 dogs with osteoarthritis added oral-transmucosal CBD to a treatment plan that included an anti-inflammatory medicine, gabapentin, and amitriptyline. Dogs in the CBD group had better owner-reported pain scores at several follow-up points. The study was small and tested one product and one treatment plan under study conditions.
A separate 90-day pilot study examined CBD in dogs receiving care with several pain treatments. Some dogs were taking gabapentin, and several later received a lower gabapentin dose after their comfort improved. The study had a small sample, changing CBD and gabapentin doses, and several treatments being used at once. It does not establish a universal CBD dose or show that the combination is suitable for every dog.
The evidence supports a limited conclusion: a veterinarian may prescribe or supervise both products in some cases, but owners should not combine them without veterinary guidance.
What Side Effects Should You Watch For?
Watch for:
- Unusual sleepiness or difficulty staying awake
- Wobbling, stumbling, or poor coordination
- Weakness or reduced responsiveness
- Vomiting or diarrhea
- Excessive drooling
- Changes in appetite
- New tremors, anxiety, or urinary accidents
- Worsening of the condition being treated
CBD can cause lethargy, unsteadiness, vomiting, and diarrhea. Gabapentin commonly causes sedation and poor coordination.
Contact your veterinarian promptly if your dog develops marked sedation, ongoing vomiting, significant wobbliness, or a noticeable behavior change.
Seek emergency veterinary care if your dog is difficult to wake, collapses, has abnormal breathing, develops severe tremors, or may have consumed THC. THC is different from CBD. In dogs, THC intoxication can cause nervous-system depression, anxiety, increased sensitivity to stimuli, urinary leakage, a rapid heart rate, and, in severe cases, death.
Should You Separate CBD and Gabapentin by Several Hours?
Separating the doses does not reliably remove the interaction risk. Both products can continue affecting a dog after administration, and the appropriate timing depends on the dog's condition, the CBD formulation, the gabapentin schedule, kidney and liver function, and other medicines.
If your veterinarian approves both products, the plan may include a lower starting dose, closer observation, gradual introduction, or follow-up blood tests. Do not create a dosing schedule based on how another dog takes these medicines.
Veterinary pain guidelines caution that cannabinoid doses may need adjustment when used with drugs that affect calcium channels, including gabapentin, to reduce excessive sedation.
What If Your Dog Already Received Both?
If your dog received one normal dose of CBD and gabapentin and is alert, breathing normally, and walking normally, call your veterinarian for advice and watch your dog closely.
Have this information ready:
- Your dog's weight and age
- The gabapentin strength and amount given
- The CBD product name, concentration, and amount given
- The time each product was administered
- Any other medicines or supplements
- Your dog's current symptoms
Do not give an extra dose because you are unsure whether a dose was given. Do not stop prescribed gabapentin abruptly if your dog takes it for epilepsy, because sudden withdrawal can cause seizures.
How Should You Choose a CBD Product for a Dog Taking Gabapentin?
Ask your veterinarian to review the exact product before giving it. CBD products can differ in concentration and may contain other cannabinoids or ingredients. Veterinary guidance notes that product standardization is limited. A certificate of analysis can help identify the cannabinoid content of a particular product.
Avoid products that:
- Do not clearly state the CBD concentration
- Do not provide batch-specific testing
- Contain THC or have uncertain THC levels
- Include several herbal ingredients your veterinarian has not reviewed
- Are made for humans but have not been checked for animal-safe ingredients
The FDA's Center for Veterinary Medicine sought public comments in January 2025 on the quality, drug interactions, adverse events, and toxicology of cannabis-derived products used in veterinary medicine. That request reflects the remaining uncertainty around these products.
Bottom Line
Dogs may sometimes take CBD with gabapentin, but the combination needs a veterinarian's approval and monitoring. Keep giving gabapentin as prescribed until your veterinarian provides different instructions, and ask before adding CBD.