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Viagra needs no introduction! Pfizer’s wonder drug, sildenafil, better known as Viagra, is the trusted treatment for male impotence problems. Introduced in 1998, Viagra, the famous erectile dysfunction (ED) drug, has been a profound influence in the human souls by such a fathom that not a single day has passed without seeing ads of the magical Erectile Dysfunction pill.

Erectile Dysfunction (ED), also known as Impotence, is the inertia of sustaining an erect penis, during or before sexual intercourse. Erectile Dysfunction (Impotence) - inability to maintain the erection of the penis for satisfactory sexual intercourse in spite of the capability of ejaculation.

Viagra has been a proved veteran in the treatment of Erectile Dysfunction(Impotence), which acts by increasing blood flow to the penis, thus improving a man’s response to sexual stimulation, thus allowing him to lead a normal sexual life. With Viagra in your hand, you are no longer an alien in solitude and Erectile Dysfunction signifying the dusk of unsung glory.

Viagra works by helping the blood vessels in the penis to relax, allowing blood to flow into the penis causing an erection. For Viagra to be effective, sexual stimulation is required. 

 Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, and others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket). Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite (”poppers”). Taking Viagra with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack.

If you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw during sexual activity, stop and call your doctor right away. You could be having a serious side effect of Viagra.

Do not take Viagra more than once a day. Allow 24 hours to pass between doses.

Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.

Do not take Viagra more than once a day. Allow 24 hours to pass between doses.

The effect of different concentrations of sildenafil citrate (Viagra) solution in vitro on human sperm motility was assessed in 85 asthenozoospermic semen specimens. Semen samples were divided equally into six tubes, one as a control and to the others, sildenafil dissolved solution was added (v/v) in vitro with five different concentrations (4.0, 2.0, 1.0, 0.5, 0.1 mg/mL). The tubes were incubated and were followed up for sperm motility changes at 0.5, 1, 2, and 3 hours. It is demonstrated that the in vitro use of sildenafil citrate solution has a concentration-related stimulatory effect on ejaculated sperm motility.