anxiety
"I was on gabapentin when I was younger around age 16 to 18 and I remembered it must had worked pretty well because I stayed on for a little while. So fast forward almost ten years and I started seeing doctor again due to social anxiety and asked if I could try gabapentin. I started low 100mg at night which actually did help me sleep and felt calming effect but I did notice a little twitchy, but all in all it was ok the problem was the next day my anxiety seemed a lot worse I even tried couple more nights and same thing always happened. I'd have physical effect of anxiety, pounding heart, etc. I am also on methadone so I don't know if this why this medication made me have such bad anxiety next day but everyone is different."