I was given gabapentin to help with a severe akathesia (so severe I was IP and pretty much completely unsedatable no matter what was given). It pretty much worked in a day. I took the first dose and about 3 hours later sat down in a group for the first time in the 4 or 5 days I'd been IP. Prior to that I did all groups standing at the back so I could leave and pace and if I sat it was in a desk chair so I could sway. Two days before gabapentin I was on 1:1 just to try to keep me doing art activities instead of pacing endlessly and then with the gabapentin I was suddenly calmer and actually quite sleepy once I'd had 2 doses. After all the agitation and huge doses of Seroquel, hydroxyzine, benadryl, fairly big dose of Zyprexa, tons of klonopin and valium and who knows what else it seemed impossible that one dose would help but it did. They usually give it in conjunction with propanolol at my hospital. I couldn't have propanolol because I already have very low blood presssure so I combined it with cogentin.