Gabapentin is a class of drug known as a GABA analogue. GABA is an abbreviation for gaba-amino-butiryc-acid, a
chemical neurotransmitter that helps induce sleep in the brain.
GABA also reduces nerve impuses, which is why it works for neuropathic pain.
While gabapentin is not GABA, it mimics its action, and creates drowsiness.The side effects are dose dependent, so please report your side effects and ask your doctor for help. Perhaps a reduced dose might help you with the drowsiness.