Hello, I am a type II diabetic, 59 year old woman with high blood pressure & high cholesterol-both treated with medications. I suffer from anxiety attacks once in awhile. I was recently put on gabapentin 300mg/3 times a day. I am experiencing extreme drowsiness approximately 1 hour after a meal, usually breakfast, to the point I have to go to sleep and am wondering what causes it. I currently take two Metformin 500mg/twice a day and have kept my blood sugar levels within range since I was diagnosed in 2002. The problem of getting that sleepy bothers me as I don't know when it will happen and it will not always occur if I eat the exact same meal. I would appreciate an answer to why this occurs.