Hey alex! I assume your australian,so am i. Mate i think it is probably the drugs causing this, most likely they have taken a while to build up strength because they will have an affect on our brain chemicals the best way to sort that out is probably go to a understanding chemist & talk to him about what the drugs will & won't do. The other possibility is that something has changed lately maybe your stressed & this is the way your body responds by affecting the brain chemicals or simply you not being able to relax. Give yourself a break from this for a while & make yourself busy doing something that will take your mind off feeling the need to masturbate that will also help you not rely on using that technique for controling the stress or tension.
hope this is of some help.

that sucks really bad i say stop taking pills and say screw it. try dealing with ur problems thne turning to meds. sound harsh buts thats reality. everyone goes though sh*t

your doctor knows you better than anyone here, don't just stop taking your meds without at least getting advise as to the side affects of stoping. obviously 19yearold hasn't realised his liability in giving such foolish comments!

what! i have the right to speak my mind retard