Gabapentin
"As I understand gabapentin, it was originally used to treat seizures but helps to keep you asleep but not necessarily, put you to sleep. My doctor is very wise but also very conservative but felt it is a rather benign drug so added it to my ambien. The combo has been very effective in giving me a full nights sleep. I live in Washington state so was encouraged by my naturopath to try medical marijuana. I take a capsule with THC only (no CBD as its about $5/pill) and it has been a Godsend with no discernible side effects.  I sleep like a baby. I still add about 200 mg gaba to keep me asleep. My only problem with gaba is I have blurred vision the next day. I understand from the fine print that this can be a side effect."