Medication Guide • Reviewed by Dr. Tiffany Delacruz, DVM
Gabapentin for Dogs
Gabapentin is a prescription medication used in dogs primarily for chronic pain, anxiety relief, and seizure control. It's commonly added to multi-drug treatment plans for arthritis or post-surgical pain.
What Gabapentin is used for in dogs
- Chronic neuropathic pain (e.g. arthritis, disc disease)
- Pre-visit anxiety in fearful dogs
- Adjunctive seizure control
- Post-surgical pain management
How it works
Gabapentin modulates calcium channels in nerve cells, calming overactive pain and anxiety signaling. It does not block pain at the source — it dampens how the nervous system perceives it.
Available formulations
100 mg capsule
300 mg capsule
400 mg capsule
Oral solution
Side effects to know
Common side effects
- • Sedation/drowsiness
- • Mild ataxia (wobbly walking)
- • Increased appetite
These usually resolve on their own. If they persist past the first few doses, ask your vet.
Call your vet immediately if you see
- ⚠ Severe sedation that doesn't resolve
- ⚠ Vomiting that persists more than 24 hours
- ⚠ Signs of overdose (extreme weakness, loss of coordination)
Drug interactions
- • Opioid pain medications (additive sedation)
- • Antacids containing aluminum or magnesium (reduce absorption)
- • Other sedative or anxiolytic drugs
When not to use
- • Dogs with severe kidney disease (dose adjustment required)
- • Dogs known to be sensitive to gabapentin
Monitoring during treatment
Your vet may check kidney function periodically. Watch for ongoing sedation or balance issues that don't fade after the first few doses.
Need a Gabapentin refill?
RexVet is the first 501(c)(3) non-profit online vet service in the U.S. Talk to a licensed veterinarian by video, get your dogs's Gabapentin prescription, and have it shipped through RexVetRx — all for $64.99 per visit.
Book a vet visit — $64.99Gabapentin for Dogs
Frequently asked questions
Is gabapentin safe for dogs?
Yes, gabapentin is widely used and considered safe in dogs when prescribed by a veterinarian. The most common side effect is sedation, which usually fades within a few doses.
How long does it take gabapentin to work in dogs?
For pain, effects start within 1-2 hours. For pre-visit anxiety, a dose is typically given 1-2 hours before the stressful event. For seizure control, the full benefit develops over several days.
Can I give my dog human gabapentin?
Many vets prescribe the same human-generic gabapentin for dogs — but only at vet-determined doses. Never use a human liquid formulation containing xylitol, which is toxic to dogs.
Can RexVet prescribe gabapentin for my dog?
Yes, when a valid vet-client relationship is established. For a new diagnosis (e.g. unexplained chronic pain), an in-person workup is often needed first, but RexVet can manage refills and dose adjustments by video.
What if I miss a dose?
Give the missed dose as soon as you remember. If it's almost time for the next dose, skip and resume the regular schedule. Never double up — gabapentin's sedative effect is dose-dependent.
Medical review by Dr. Tiffany Delacruz, DVM
Chief Executive Officer & Lead Veterinarian, RexVet. Licensed in Florida, New York, and Virginia.
Last fact-checked: 2026-05-19
Sources
This page is an educational reference and does not replace veterinary advice. Always consult a licensed veterinarian before starting, changing, or stopping medication for your pet.