Stresses and reduction of health have a negative impact on male sexual function. As a result, a decrease in erectile function make men doubt their abilities. In these situations, additional stimulation of erectile function would be a reasonable solution. There are three common substances used for this purpose.
Sildenafil citrate. The most popular drug among all similar products on the market. As an analogue of the well-known drug Viagra. It is in the greatest demand among customers.
Tadalafil is an analogue of Cialis, having virtually no side effects with a very prolonged action duration (up to 36 hours). It has gained considerable popularity on the market.
Vardenafil. It I known under brand name Levitra, and has established itself as a powerful drug to improve erection, it is able to maintain its effectiveness even with the use of high doses of alcohol.