Levitra versus cialis Cialis?Avoid drinking alcohol, which can increase some of the side effects of Cialis.Grapefruit and grapefruit juice may interact with Cialis. Discuss the use of grapefruit products with your doctor. levitra versus cialis not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.Do.

Levitra versus cialis dose, onset of action, and duration of action is unique.Cialis is a member of a family of drugs called PDE5 Inhibitors. Cialis is now marketed in approximately 40 countries and is available by prescription in pharmacies on five continents.Cialis was developed by Icos, a levitra versus cialis small biotech levitra versus cialis located in Washington State, in the United states. Icos has formed a 50/50 joint venture with American Pharmaceutical Giant, Eli Lilly & company. The levitra versus cialis is called Lilly Icos .*******************Bottom Line on how Cialis Works:When levitra versus cialis erection goes limp, you have PDE5 levitra versus cialis thank. Specialized penis tissue produces a substance called cyclic guanosine monophosphate (cGMP) in response to sexual stimulation.The more cGMP available, the more durable the erection. Cialis inhibits the PDE5 enzyme, preserving cGMP levels, therefore aiding erection viability and durability.*******************The BIG Discovery: cyclic guanosine monophosphate (cGMP)Some very smart scientists discovered that cyclic guanosine.

Levitra versus cialis is especially bothersome.What other drugs will affect Cialis?Before taking Cialis, tell your doctor if you are using any of the.