I am taking gabapentine 300 mg 4 times a day for cough. I tried after a week of this dosage to increase to 5 times a day and I had a bad allergic reaction., with swallowed face, redness in the face, a major headache, body hache, zand fever. I guess the maximum dose I ca tolerate is 1,400 mg a day. Because of that I need to tolerate a significant amount of cough, My question: are there alternative medication . Thank you