Viagra abuse may increase the risk of contracting HIV or STD's during sex or cause other health problems.
Viagra, manufactured by pharmaceutical company Pfizer, increases blood flow to the penis. This prolonged rise in blood circulation can increase the risk of transmitting or contracting HIV or blood borne STD's, especially during oral sex if either partner has a cut or scrape in the gums or during anal if there are abrasions.
More about how HIV is contracted after the jump.

