All three cause unpleasant side effects that get worse once you pass 60 especially back and leg pain. The side effects are dosage related. Cialis stays in your system for a couple of days http://cafarts.org/en/forums/topic/kaupa-doxiplus-an-lyfsedilsskylds-lyfsolu-paris-doxycycline-tablet/ [source] [check] and kicks in within 20 minutes of taking. But it has the strongest negative side effects especially back and leg pain. Viagra is the least effective of all https://forums.empressflyff.com/newthread.php?fid=25
three major ED drugs with the usual side effects. Takes a long time to kick in leaves your body within a couple of hours. Beware OTC meds