Viagra, Cialis and Levitra Comparison

Viagra, Cialis and Levitra are FDA approved prescription drugs basically used to treat erectile dysfunction (male impotence).

Viagra has been the most popular ED drug for years and ED patients from all over the world have been using the little blue pill, i.e. Viagra, to help them overcome erection problems.

Cialis is known as the weekend pill. That's because it can last up to 36 hours. Cialis is the main competitor of Viagra in the worldwide prescription drug market. In fact, some experts believe that Cialis will become the most preferred impotence treatment and conquer the Viagra "empire".

Levitra is the least popular among these "top 3" ED drugs. Nevertheless, Levitra is no less effective than Viagra or Cialis.

The table below briefly compares these three drugs.

Attribute/Drug Name	Viagra	Cialis	Levitra
Generic Name:	Sildenafil Citrate	Tadalafil	Vardenafil
Approved Dosage:	25-mg, 50-mg, and 100-mg	5-mg, 10-mg, and 20-mg	2.5-mg, 5-mg, 10-mg, and 20-mg
Effect:	4 hours	up to 36 hours	4 hours