<prompt> Most accurate treatment of erectile dysfunction:SildenafilMaster and johnson techniqueB-blockersPapaverine  <response>: A i.e. SildenafilSildenafil is only approved effective oral agent for erectile dysfunctionQ. It is useful in wide range of e.d.including - pyschogenic, diabetogenic, vasculogenic, post radical prostatectomy nerve sparing procedure spinal cord injury.It acts by inhibiting phosphodiesterase - 5 PDE-5Q releasing NOQ from nerve endings endotheliumOther tt for Erectile dysfunction are:PIPE therapy PapaverineQ Phentolamine Induced Penile Erection- AndrogenIntraurethral - alprostodil PGE1Penile prosthasis, vaccum constriction deviceMaster Johnson technique is for premature ejaculationQp Blockers can cause erectile dysfunctionQ 