Gabapentin
"For me it had a lot of hallucinogenic properties that lasted for 3 days. The sleep was solid though. It was when you woke up that the hallucinations began. There were closed-eyed and open-eyed hallucinations. In terms of strength, the closed-eyed hallucinations were vivid and clear, like watching TV. The open-eyed ones were very subtle. They decreased rapidly as you got up. The open-eyed hallucinations were still visible well into the third day. If you concentrated you could make them out. I only took the drug twice. 600mg and 300mg. No difference in intensity between the two but at 300mg the residual effects did not last as long."