All three cause unpleasant side effects that get worse once you pass 60 especially back and leg pain. The side effects are dosage http://cafarts.org/en/forums/topic/bestalla-stilnoct-utan-recept-billigt-levothyroxine-sodium-tablets-2/ [source] [check] related. Cialis stays in your system for a couple of days 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 three major ED drugs http://ddkits.com/content/markdown-quick-reference#comment-form [source] [check]
with the usual side effects. Takes a long time to kick in leaves your body within a couple of hours. Beware OTC meds that contribute to ED antacids antihistamines some NSAIDs and melatonin. And even one glass of wine or a full stomach