About Viagra
Viagra works for men with erectile dysfunction (ED). It is taken on an as-needed basis and usually begins to work within 30 to 60 minutes. It is proven to be effective in about 4 out of 5 men, helping them achieve erections hard enough for sex. It works when a man is sexually stimulated, and can be taken up to 4 hours before sexual activity, and the erection should go away right after sex.
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How does It Work?
Viagra works for men with ED. It increases blood flow to the penis so that an erection hard enough for sex can occur. While individual results vary, it has been proven to help men with varying degrees of ED. This drug only needs to be taken on an as-needed basis. It works when a man is sexually stimulated.
History
The discovery of Viagra was unexpected and unplanned. Sildenafil was originally developed by Pfizer for the treatment of hypertension and chest pain caused by heart disease. On March 27, 1998, the FDA approved its use to treat impotence. It is manufactured by Pfizer.
What Does It Cost?
Viagra costs between $40.00 and $45.00 a tablet, so for 10 tablets of 100mg each, it will cost between $400.00 and $450.00.
Precautions
Viagra works when a man is sexually stimulated. It can be taken up to 4 hours before sexual activity, and it should go away after sex. In the event of an erection lasting longer than 4 hours, it is important to seek immediate medical help.
It should not be combined with other drugs called nitrates. When combined, these drugs could cause a harmful drop in blood pressure. If you have ever had an allergic reaction to sildenafil, do not take this drug.
Serious side effects can include an erection that won’t go away, sudden vision loss in one or both eyes, and sudden hearing loss or tinnitus. If any of these occur, stop taking Viagra and consult your doctor.