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Increasing use and abuse of sildenafil (Viagra®) has been studied among gay men and the results show that there is an increased risk of STDs and HIV infection. Men are also mixing Viagra® with other drugs such as methamphetamine to dramatically heighten their sexual experiences.
Viagra® is prescribed by physicians for patients who suffer not only from erectile dysfunction, but also hypertension. In the August 2007 issue of Harvard Men's Health Watch, it was reported that Viagra® successfully treats pulmonary hypertension and has potential to treat several other conditions such as high blood pressure, depression, high cholesterol and other heart diseases.
Cialis® and Levitra® are also erectile dysfunction medications that are in competition with Viagra®. They all work by the same means and have similar side effects that include headaches and facial flushing.