Viagra is a well-tried and reliable remedy for erectile dysfunction treatment which improves men’s sexual function and helps lead normal sexual life.

The invention of Viagra is the third ultimate discovery after penicillin and x-rays. The scientists who discovered the nature of Sildenafil (the main active constituent of Viagra) were awarded by Nobel Prize in 1998. At first the scientists considered that Sildenafil Citrate would increase the blood flow to cardiac muscle but in the course of experiment it was found that Sildenafil caused blood circulation to genital organs. Since 1993 various clinical researches were held and as a result it was proved that Viagra was an ideal remedy for erectile dysfunction treatment.

In these latter days every man can order Viagra online and bring back natural erection. Several years ago for buying Viagra a person should have a prescription but now this question is not a problem. At any online chemists shop you can buy over the counter Viagra and the medicine will be delivered to your address.

Viagra intake leads to artery dilatation and betters blood circulation in penis. It acts only if there is the object of sexual stimulation. At the end of sexual intercourse, detumescence happens. Viagra improves erection in more than 76% of cases. 60 % of men who suffered from nasty form of erectile dysfunction estimated erection as good or even perfect.

Viagra should be taken in 40-50 minutes before sexual intercourse and acts during 4-6 hours. Cialis vs Viagra acts longer (36 hours) but for normal sexual life leading and receiving unforgettable sexual experience six hours are usually enough. Viagra and alcoholic beverages are incompatible with each other. Their taking together is strictly forbidden. Specialists also advice taking Viagra on an empty stomach because fat food reduces drug effect.

Speaking about side effects it bears mentioning that Viagra belongs to the group of medicines side effects of which are nonthreatening. Usually men complain about headache, nose stuffing, hyperemia or dizziness. But those patients who have cardio vascular diseases shouldn’t self-medicate. In some cases (such as unstable angina, cardiac or liver decompensation) Viagra intake is strictly forbidden. Patients who take Viagra side effects of which are rather inconspicuous should know that they also shouldn’t be neglected.

Nowadays there is an opportunity to order Generic Viagra, the analogue of brand medicine but at a moderate charge. You can buy Viagra online using the service of one of the online drug stores. From time to time you can bear a part in some discounts and get free sample of Viagra.

Moreover, recently so called female Viagra appeared. Despite of Viagra for men, which substantially changes blood flow in penis, female Viagra influences on the level of dopamine and serotonin in women’s brain. Its main component is flibanserin and this medicine should be taken every day. If you remember about it before sexual intercourse it will not act.