Vardenafil (Levitra) Vardenafil or Levitra like Viagra is a phosphodiesterase type-5 inhibitor and was developed specifically for erectile dysfunction as an oral agent. Multiple trials have shown that Levitra (Bayer Pharmaceuticals) is effective in improving the rate of achieving and maintaining an erection during sexual intercourse. Improvement also was noted in other aspects of sexual function, including confidence, orgasmic function and overall satisfaction.

Vardenafil produces significant improvements in erectile dysfunction regardless of age, baseline severity and cause of erectile dysfunction. It is also effective in patients with diabetes and after radical prostatectomy surgery for prostate cancer. Levitra has a rapid onset of action and sexual intercourse is possible as early as 16 minutes after its administration by mouth in some patients.

Twenty milligrams of Levitra has sustained longterm efficacy by providing up to 92% of patients with improved erections during more than two years of treatment.

Levitra is well tolerated with side effects very similar to that of Viagra. The most common side effects are headache, flushing, rhinitis (stuffy nose) and indigestion (heartburn), which are mild or moderate and generally decreased with continued treatment.

Levitra comes in two dosages namely ten and twenty milligrams. Ten milligrams is more than adequate for mild to moderate erectile dysfunction.

Tadalafil (Cialis) Cialis is one of the new PDE-5 inhibitors for the treatment of erectile dysfunction. Also dubbed the weekend drug for its long duration of working, up to 36 hours in some patients. This is because the chemical structure is completely unrelated to the other two PDE-5 inhibitors.

Cialis has been demonstrated to be effective in all severities of erectile dysfunction and for different causes of erectile dysfunction.

Side effects although similar to the other two PDE-5 inhibitors, have the addition of back pain that appear to be self limiting, mild and benign.

Cialis is also contra-indicated with nitroglycerine or any nitrate medications because of a drop in blood pressure.