The action of Viagra is based on smooth muscles relaxation and blood flow increase to cavernous body. Viagra enlarges the blood-vessels of cavernous body at the sexual excitement. As a result the blood flow increases making it possible to achieve normal erection.
The effect of this preparation was introduced in 1992 when the pharmaceutical company “Pfizer” had conducted trials of preparation containing sildenafil. The scientists tried to create the preparation to increase the blood flow to the cardiac muscle but the effect was opposite. The blood flow increase was observed at men’s genitals. In 1998 the release of Viagra started in the USA. Now Viagra may be bought favourably at My Canadian Pharmacy. We are an online pharmacy with a wide range of drugs inclusively of Viagra. There is no demand to have prescription list that’s why command our service right now and receive Viagra at the stated time spans.