I've been on a 150mg dose for 8 years now. I had various other med cocktails with it...along with a 300 dose for quite a while. 150 morn. and 150 eve.
Had headaches and a weird vision thing going on initially.
No problems now. Get a little drowsy sometimes.
Really does work for me.
Went off it last year and noticed the "slip" within about a week.
Good luck...
m.b.