Hi Pins. I have been on Gabapentin for about 6 months. First 300mg x3, then 600 x 3 and finally 900mg x 3. At first it seemed to help (Osteoarthritis in lower spine, hips and knee), but then it stopped and when I was put on 900mg it just didnt work at all and my sleep was very bad. Gabapentin Drug Guide. In 2015, doctors wrote 57 million prescriptions for gabapentin, an anticonvulsant drug that has been praised for being a safer painkilling alternative to the powerful opioids that have driven the drug abuse epidemic in America. If you have questions about side effects, contact your physician. There is nothing about gabapentin that specifically states hair loss as one of it's side effects as you can see. Very informative. Since taking Gabapentin I have gained quite a bit of weight. Which is causing depression for me. This will be my chief complaint with my Neurologist next month. Gabapentin side effects in dogs. While most of the gabapentin side effects in dogs are limited to mild sedation and ataxia, there are a number of more serious side effects that are associated with exceeding the recommended dosage. Hello Shanon, To the best of my knowledge, the max dose of gabapentin is 3600mg per day. I currently take 2700mg myself on a daily basis. I take it for fibro and neuropathic pain. I was taking Lyrica and was still in pain, my doctor switched me to Gabapentin and at first I thought it was better. But a year and a half later I feel like the side effects are worse than the cure. Gabapentin received an overall rating of 7 out of 10 stars from 180 reviews. See what others have said about Gabapentin, including the effectiveness, ease of use and side effects. Gabapentin (Neurontin) is an anticonvulsant medication in the GABA analog lass that was originally created to help manage epilepsy, but is also utilized to help individuals suffering from neuropathic pain. Gabapentin is a drug that was approved by the FDA in 1993 as an adjunct treatment for epileptic seizures. It has since attained approval for the treatment of partial seizures in adults and children.