I'm taking 400mg three times a day. For me it's lightly sedating. (I have to take a lot of sedating meds to calm down.) I still have some anxiety (from Latuda I think) so I also take 50mg of Vistaril. That calms me down but it also dries me out, so I drink a lot of fluids.

My husband made the mistake of taking a 300mg pill and it sent him off to la-la land for a good six hours. He didn't want to do that again, lol.

I would be careful with taking a second dose. You may end up sleeping instead of working out.