Save half the cost or even quarter the pills if you're using Viagra daily. More is not necessarily better!!! Wish it were though ;>)
The goal of taking a PDE5 is still achieved with half the dose. All studies so far, claim the dose isn't what makes the difference. It's the facilitation of NO, leading to better oxygenation/circulation during a man's normal nocturnal cycle that matters. Before current studies were complete, Paul took 10mg Levitra every night for 12 months as prescribed. Now he uses 50mg Viagra 2-3 nights a week or prn (as needed). With his history of surgery, radiation and hypogonadism, it helps him to stay on a small dose a few days a week.
There are some medication issues but not many really. Of course, any nitrate is very dangerous, even deadly within 48 hours of taking any one of the PDE5's. Actually, the 48 hour thing came about because of the longer acting Cialis. 24 hours is / was the standard prior to that. Please make your pharmacist aware of all medications you are taking. People taking alpha-blockers (BP meds) MAY need to adjust them a tad while using Cialis / Levitra as a maint. med. Some have even gone off their BP meds because a routine of Cialis works as well. Kinda double bonus, eh :>)