Elavil, for the first little while, but nothing major.
Neurontin - well I was up to 3600mg/day, the
maximum dose, and it never ever made me sleepy. Others here have reported problems at only 100 - 300mg/day.
I'm now experimenting with Lyrica; coming off the Neurontin slowly and going up on the Lyrica. GP prescripted up to a max. of 150mg per day of Lyrica. Right now I'm at 100mg Lyrica, 1800mg Neurontin, and 50mg Elavil.