What is the difference between viagra cialis and levitra (vardenafil) tablets and can anyone take it and what are its uses and side effects?

Levitra (vardenafil) lasts longer: Cialis, Levitra (vardenafil)/Staxyn, Stendra, and Viagra work by a similar mechanism to cause erections. There are subtle differences in how long the drug works and how quickly it works. Levitra (vardenafil) works longer than Viagra. They both take effect in about 30 minutes. With Levitra (vardenafil), the effects last for about 5 hours. Viagra, lasts approx 4 hrs. Levitra (vardenafil) is taken about 1 hr before it is needed, Cialis 12 hrs before