Necessity and curiosity leads to invention providing the answers for two words "why" and "how". Viagra is the answer for the term impotence. Impotence is the incapability of a man to achieve or maintain an erection sufficient for fulfilling his sexual needs or the needs of his partner, also named as erectile dysfunction.

Basic information about Viagra:

Viagra-pills were launched in 1998 in US being approved by FDA on March 27, 1998 providing a relief for millions of men who failed in having the immense pleasure of love making due to erectile dysfunction. The Viagra has Sildenafil Citrate as an active ingrediant. The effect of Viagra could be noticed with in 30 minutes after consumption and lasts for 4 hours and it works by increasing blood flow to the penis.

Interfering with the nature's process sometimes has adverse effects. The immune system of every person is different and so the Viagra pills have dissimilar effects. The common side effects which were experienced by few of the customer taking Viagra are:

. headache,

. facial flushing,

. upset stomach

. bluish vision,

. blurred vision,

. sensitivity to light

. a cause of death in men with heart disease

Few tips while buying Viagra online:

Because of the expansion of online pharmaceutical sites world wide people find it most convenient to get what they want without letting others to know about it, and also it is fast and reliable. But due to the existence of high profit market for Viagra fake pharmaceuticals came into existence to have there share of profit by fooling there customers. Therefore men's who want to buy or are buying Viagra online should consider few points to avoid fraudulence -

. Consult the doctor to know whether Viagra is right choice or not and if yes then what dose limit you should have.

. You must ask the physical address of the site, if it fails then it would be better not to buy from that site.

. The web site should be VIPPS (Verified Internet Pharmacy Practice Sites) certified pharmacy.

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