Beg to differ with you, but Levitra is 50X more focused on the PDE5 enzyme than cialias. (I'll gladly provide the clinical studies for proof if really interested) Ever wonder why Levitra recommended starting dose is 10mg?
Levitra has fewest side effects of all 3. Cialias ranks the worst when it comes to headaches, muscle aches, etc. In addition, if you take a drug that has a half life of 18 hours, any bad sides you acquire could possibly last for 36 hours. Not, IMO, the best drug to take. Many Urologists that I speak with on a daily basis say that Levitra will be the only one left on the market when all is said and done.
Levitra has NO indications for vision problems either like viagra. The vision is affected by the PDE6 enzyme....whereas Levitra is more focused and doesn't cross over as bad. Cialias effects the PDE10 enzyme....resulting in transient lower back pains and leg pains. All of these are on their Product Inserts for each drug.
It kind of scares me how popular Cialias is on the UL market, considering it's not the cleanest (when dealing with efficacy and sides) of the 3 drugs to begin with. But, for some reason everyone on here continues to push it.
peace,
ttgb