Viagra is one of the medications licensed to treat erectile dysfunction. The number of people suffering from this condition is on the rise, with many of them looking for the most effective treatment. Erectile dysfunction is a condition that characterized by the repeated failure to get or keep an erection for sexual intercourse. It is caused by the release of chemicals known as PDE5 which are responsible for causing the constriction of the penis resulting to blood leaving the penis.
Viagra works by blocking the PDEG chemical, resulting to the increased amounts of chemicals responsible for the erection, allowing the users to get and maintain an erection throughout the sexual intercourse. When the chemical is inhibited, the smooth muscle relaxation is increased leading to the relaxation of the arteries in the penis thus increasing the efficiency of the erection.

It is important to keep in mind that Viagra is only effective when the man is aroused, because the chemicals responsible for maintaining the erection are released in this state. This means that Viagra has no effect in the release of these chemicals; rather, it is responsible for keeping them in the penis for a longer duration.

When it comes to the speed at which Viagra works, it has been proven to work in as little as 14 minutes, but in some people, it will take up to 30 minutes for them to see the results. In order for the drug to work as desired, it is important for the users to take it as prescribed by the doctor. It is recommended that the users take the drug 1 hour before intercourse for effective results. The erection can last to up to 4 hours, but if the users notice that it lasts longer, they should contact their physician immediately.

It is also important for the users to find out if they qualify to use Viagra because it may differently affect different people. The positive is thing is that Viagra is a safe drug, but users are warned against using it with nitrates. They should also avoid using Viagra with other forms of similar therapies or medication for erectile dysfunction.