Gabapentin for dogs

If your vet has just sent you home with a script for gabapentin, you're in good company. It's one of the most commonly prescribed medicines for dogs, particularly older dogs with stiff joints or nerve pain. It was first developed for people, but vets have relied on it for years because it helps a lot of dogs and is generally very safe.

Below we cover what gabapentin for dogs is used for, how vets work out the dose, the side effects worth watching for, and a few safety points every owner should know before the dose goes down.

What is gabapentin?

Gabapentin is an anticonvulsant and pain reliever. It works by quieting overactive nerve signals, which is why it helps with both seizures and pain that comes from the nerves themselves. The Merck Veterinary Manual describes it as particularly useful for chronic and neuropathic (nerve) pain.

In Australia, gabapentin is a prescription-only medicine. The products dispensed for dogs are usually the same capsules, tablets and liquids made for people, so vets prescribe them "off label". That sounds unusual, but it's routine in veterinary practice and perfectly appropriate once your vet has examined your dog.

What is gabapentin used for in dogs?

Chronic and nerve pain

This is the big one. Vets reach for gabapentin when a dog has arthritis, disc disease in the spine, or long-standing nerve pain. Sometimes it is used for post-surgery pain, but the evidence that it works well for this is lacking. It's often paired with an anti-inflammatory such as meloxicam, because the two medicines tackle pain in different ways and tend to work better together than either one alone.

Seizures

Gabapentin isn't usually the first medicine a vet chooses for epilepsy. Instead, it's added on when a dog's seizures aren't fully controlled by their main anti-seizure medication.

Anxiety and stressful events

Some dogs fall apart at the vet clinic, during thunderstorms or on long car trips. A dose of gabapentin before the event can take the edge off. One approach vets use is a dose the night before, then another one to two hours before the stressful event. If anxiety is an everyday problem rather than a once-off, have a look at our guide to dog anxiety medications.

Gabapentin for dogs dosage

There's no single gabapentin for dogs dosage that suits every pet. Your vet will look at your dog's weight, the condition being treated, their kidney function and any other medicines they take.

As a guide, the Merck Veterinary Manual lists a typical starting dose for pain of 10 to 15 mg per kilogram, given by mouth every 8 hours. If that isn't enough, vets may slowly increase it to 20 to 30 mg/kg depending on how the dog responds. Doses for seizures and anxiety can look quite different, which is why the label on your dog's medicine always wins over anything you read online.

Example starting doses by weight

Here's the 10 to 15 mg/kg maths for a few body weights. It's for illustration only, not a replacement for your vet's instructions.

Tips for giving gabapentin

• It can be given with or without food. If your dog vomits after a dose, try giving the next one with a meal.
• It usually starts working within one to two hours, and each dose typically lasts around 8 hours, which is why it's usually given three times a day.
• Vets often start low and build the dose up over several days. This helps your dog adjust and keeps drowsiness to a minimum.
• If you miss a dose, give it when you remember, unless the next one is nearly due. Never double up.

Gabapentin for dogs side effects

The good news is that most dogs handle gabapentin really well. When gabapentin for dogs side effects do show up, they're usually mild and settle within a few days as the body gets used to the medicine.

Common side effects

• Sleepiness. By far the most common one. Some dogs barely notice it, while others spend the first day or two snoozing more than usual.
• Wobbliness. You might see your dog a little unsteady on their feet, especially the back legs. Vets call this ataxia.
• Upset tummy. Occasional vomiting or loose stools can happen. Giving doses with food often helps.

Less common side effects

Allergic reactions are uncommon but possible. Watch for facial swelling, hives, itchiness or trouble breathing, and contact your vet straight away if you see any of these.

A note for senior dogs

Many dogs on gabapentin are older and may already be a bit weak in the hind legs. Extra wobbliness can make stairs and slippery floors risky for the first few days. Rugs, a harness and a helping hand on the stairs go a long way.

When to call your vet

Ring your vet if your dog is so drowsy they're hard to wake, can't stand or walk properly, keeps vomiting, or seems to be in more pain than before. Gabapentin has a wide safety margin, but if your dog gets into the bottle or receives too much by accident, call your vet or nearest emergency clinic for advice.

Important safety tips

Watch out for xylitol

Some gabapentin oral liquids made for people contain xylitol, a sweetener that is highly toxic to dogs. Never use a human liquid unless your vet or pharmacist has confirmed it's xylitol-free.

Dogs that need extra care

Gabapentin is cleared mainly by the kidneys, so dogs with kidney disease often need a lower dose. Vets also take extra care with dogs that have liver disease, are pregnant or are feeding puppies.

Medicine interactions

Tell your vet about everything your dog takes, including supplements. Antacids can reduce how much gabapentin is absorbed, and combining it with opioid pain relievers such as morphine can add to drowsiness. PetMD also advises against mixing it with CBD oil for the same reason. On the other hand, gabapentin is often prescribed alongside trazodone for anxious dogs.

Don't stop suddenly

This matters most for dogs taking gabapentin for seizures. Stopping abruptly can trigger withdrawal seizures, so your vet will taper the dose down over time if it needs to end.

Storage

Store capsules and tablets at room temperature, away from moisture and out of reach of curious noses.

Frequently asked questions

How long does gabapentin take to work in dogs?

Most dogs feel the effects within one to two hours. For long-term pain, it can take a little longer to find the dose that gives the best relief.

Can my dog stay on gabapentin long term?

Yes. Plenty of arthritic and senior dogs take it every day for months or years. Your vet will check in regularly to make sure the dose is still right.

Can I give my dog human gabapentin?

Only if your vet has prescribed it. Vets often prescribe human products, but the dose has to be worked out for your dog, and liquids must be checked for xylitol.

How quickly does gabapentin make dogs sleepy?

Most dogs start to look relaxed or drowsy within 1 to 2 hours of a dose. You might notice your dog settling down, napping more, or walking a little unsteadily. That's why vets often suggest giving it 2 to 3 hours before a stressful event like a vet visit. The sleepiness usually fades within 8 to 12 hours, though some dogs stay a bit dozy for longer when they first start. If your dog seems very sedated or can't walk safely, call your vet.

Getting gabapentin for your dog

Gabapentin can make a real difference to a dog living with pain, seizures or stress. If your vet has prescribed it, Pills for Paws can dispense it, compound it and deliver it straight to your door. Simply order it online, email us the vet's prescription and our pharmacy team will take care of the rest. If you have any questions about your dog's medicine, we're always happy to help.