Gabapentin 300mg (100 capsule) | On Sale | EntirelyPets Rx
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Gabapentin 300mg (100 capsule) (Manufacturer may vary)

Item# IWM035761
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Unable to ship to the following states:

  • Kentucky, Michigan, Minnesota, New Jersey, North Dakota, Ohio, Tennessee, Virginia, West Virginia, Alabama, Washing DC, Kansas, Massachusetts, Oregon and Wyoming.


Gabapentin is a medication for the treatment of seizures. It is also used to help with chronic pain. Although Gabapentin is not FDA-approved for use in veterinary medicine, it is a commonly accepted practice for veterinarians to prescribe this medication for dogs. Gabapentin requires a prescription from your veterinarian, and is sold per capsule.

Key Benefits

  • Medication for the treatment pain, especially chronic pain
  • Gabapentin can also be used to treat seizures
  • Available in two prescription strengths in tablet or capsule form

How It Works

Gabapentin stabilizes electrical activity in the brain which prevents seizures caused by excessive electrical activity. Gabapentin mimics the activity of GABA (a neurotransmitter) which helps to calm the nerve activity in the brain.


Weight Dosage
all weights

For seizures: 4.5 mg-13.5 mg per pound every 8-12 hours.

For pain: 1.4 mg per pound once a day.


Unless the benefits outweigh the risk, do not use Gabapentin in pregnant or nursing pets.


Because gabapentin is almost completely eliminated from the body by the urinary tract and kidneys, it should be administered with caution in animals with kidney disease.


Should be stored at room temperature, away from moisture and light.


Gabapentin is a prescription medication not FDA approved for veterinary use; however, it is a commonly accepted practice for veterinarians to use this medication in dogs. Gabapentin is available as 100 mg, 300 mg, and 400 mg capsules. The usual dose to treat seizures in dogs is 4.5 to 13.5 mg per lb every 8 to 12 hours. As an aid in chronic pain treatment or cancer pain in dogs, the usual dose is 1.4 mg per lb once a day.
Tell your veterinarian if your pet has kidney disease. The dose of Gabapentin may need to be adjusted. Unless the benefit outweighs the risks do not use Gabapentin in pregnant or nursing pets.
Give this medication exactly as directed by your veterinarian. If you do not understand the directions ask the pharmacist or veterinarian to explain them to you. Do not give antacids within 2 hours of giving Gabapentin. Antacids can affect Gabapentin blood levels. Drug interactions may occur when giving any narcotics such as hydrocodone or morphine. Do not suddenly stop the use of Gabapentin. Store Gabapentin at room temperature away from moisture and heat. Keep this medication away from children.
If any of the following serious side effects occur, stop giving Gabapentin and seek emergency veterinary medical attention: an allergic reaction (difficulty breathing; swelling of the lips; tongue or face; hives). Side effects that can occur in dogs may include drowsiness, loss of balance, swelling of the limbs, and vomiting or diarrhea. Talk to your veterinarian about any side effect that seems unusual or bothersome to your pet.
Give the missed dose as soon as you remember during the same day. However, if you don't remember until the next day, skip the dose you missed and give only the next regularly scheduled dose. Do not give a double dose of the medication.
Seek emergency veterinary medical treatment. Symptoms of Gabapentin overdose include reduced activity, excessive sleepiness, loss of balance, and depression.
Gabapentin should not be used in pets allergic to it. Do not use in pregnant or nursing pets. Use with caution in pets with kidney disease. Do not give antacids within 2 hours of giving Gabapentin. Consult your veterinarian before giving any narcotic such as hydrocodone or morphine since drug interactions can occur.
Tell your veterinarian if your pet is being given antacids or narcotics for pain. Drugs other than those listed may also interact with Gabapentin. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medicines including vitamins, and supplements.


Review Summary
6 Reviews
83% (5)
0% (0)
17% (1)
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0% (0)
83% Recommend this product (5 of 6 responses)
By Bernard F.
The Best Pet Drug Store
January 3, 2021
These folks are easy to work with and have the best prescription prices for all your pets needs
By Lois
Gazelle, CA
Great company
January 3, 2020
Good prices. Top notch medications.
Easy to order
  • Great prices. Same medication that I buy at the doctors office.
By Marge
Harrissville, PA
Anxiety & nerve pain relief
August 16, 2018
My dog was very restless and nothing we did helped him. We took him to the vet and she prescribed Gabapentin capsules. These pills relieved his anxiety. I am so thankful that he can now rest. I would recommend these.
Merchant Response:Hi Marge, thank you for your feedback and it's great to hear the Gabapentin works so well for your dogs!
By Barbara
August 4, 2018
Finn was without Gabapentin for long enough that I could easily see the disasterous effects on him. He needed me to lift up his back end to ascend a 3" step. The day after I restarted the drug, he was bouncing around like the old Finn!

Merchant Response:Hello Barbara, thank you so much for your feedback and we're so happy to hear the Gabapentin helps your pet! Good Luck :)
  • I wish it were easier to trick him into taking the pill!
By OES o.
Loveland, CO
Concerning "Gabapentin" caplets
July 4, 2018
Thought we would be getting an unopened bottle. Your 2 generic prescription bottles with computer generated labels filled with bulk caplets leaves me a little unsettled as to what the item REALLY is. There is no proof of the actual Gabapentin product, and though "Manufacture may vary" is stated, these caplets did not resemble the previous Gabapentin we purchased from our vet.
Hope for our 13-year-old OES, the product is real and effective.
Merchant Response:OES owner, we run a well regulated pharmacy. California State Board visits often for auditing purposes. There is no trickery or shady business of any kind. Rest assured you have gotten the real deal and your moeny's worth. This is exactly as you would get it from your veterinarian. You can call us at any time (during our business hours) to do a pharmacist consultation.
By Connie C.
Montrose pa
Very happy
October 18, 2017
I'm very happy with the price.

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