I use Blue Chew, they offer all 3 ED meds. Easy physician "screening" and relatively inexpensive, mailed to you. I tried all and found Vardenafil, 8 mg, does the trick for me with less side effects than Viagra. I can get multiple hard ons over the course of many hours. One thing to keep in mind is these meds "help" you get and keep an erection. ED meds won't give you sex drive or the stimulation, hot young provider will do that ;-). My suggestion is to try more than one med and strength. It may be a pain but we all react differently to meds and you need to find the one that works for you.