I have a long desire for sex in my 52 years of age. I used to get erection normally and particularly in the morning it is usually erect. But my timing is very less and also do not sustain harder erection for adequate time. At the sane time I want to minimize the arousal period for subsequent encounter. My doctor prescribed me pexep cr tryptomer and megalis is it good as I do live lively and no anxiety features at all. Whereas the pexep cr and tryptomer are anxiety related. Please advise.