"i am a 67 yr old male. had shingles about 2 years ago and my doc rx&#039;d gabapentin. gave only minimal pain relief. i&#039;ve had insomnia for years but never sought treatment. had tried benadryl, that made me sleepy but i would awake after 2-3 hrs. so tried one 100mg gabapentin and 25 mg of benadryl in pm. fantastic!  i sleep 7-8 hrs of restful sleep with no noticeable side effects. the normal higher dose had no added benefit for me and tended to make me slightly dizzy."