What do i do if i wake up with a painful erection that won't go down?

Painful erection: If you are on any erection medicine you go to the er. If you are on any other medication such as trazedone that can cause this condition you also go to the er. Otherwise please attempt to ejaculate first.

See below: Since this presumably started at an unknown time while you were sleeping, if the erection does not go away within an hour, head to the local er. An unwanted erection that persists, also called priapism, is a serious condition and can result in inability to have erections in the future if not treated promptly. Good luck!