Can amphtamine/speed cause damage 2 my pc muscle, i hav lost its strength totaly gone, canot make myself get a hard erection nor stop myself urinating?

Get off this drug...: By the sequence of events, amphetamine is highly suspected to be the culprit for your reported symptom. But there is no sure way to tell if amphetamine causes all the reported symptoms unless you are willing to discontinue its use and see how your reported symptoms may evolve and fade. So, stop its use and see. More? Seek evaluation & counseling.