For Anxiety: Gabapentin made me cry uncontrollably - I was on it for my anxiety. It gave me dark thoughts and I felt buzzed, weak, drained, and a worthless feeling. How painkillers work and which conditions they can treat. Includes details of different types of analgesic drug and information about side effects. Learn about Neurontin (Gabapentin) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. One of the most common side effects of fibro drugs, reported by both doctors and patients, is dizziness. In the clinical trials for Lyrica, the first drug approved specifically for fibro by the. 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. Since upping my dose of Gabapentin to 1600mg daily for Neuropathy and Migraines I am retaining fluid and I have to push to pee. I am drinking lots and lots of water to counteract the swelling but wonder what the having to push to pee means. 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 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. Gabapentin is a prescription drug most commonly prescribed to relieve nerve pain following shingles in adults, treating the pain of post herpetic neuralgia. Learn about side effects, drug interactions, dosages, warnings, and more. Patient information for GABAPENTIN 300MG CAPSULES Including dosage instructions and possible side effects.