Medication Pills

The Food and Drug Administration (FDA) approved Viagra in 1998, and it became the first oral medication for erectile dysfunction on the market. Since then, Levitra and Cialis have been approved, providing more options for oral therapy.

Viagra, Levitra and Cialis work in much the same way. Chemically known as phosphodiesterase inhibitors, these drugs enhance the effects of nitric oxide, a chemical messenger that relaxes smooth muscles in the penis. This increases the amount of blood and allows a natural sequence to occur — an erection in response to sexual stimulation. These medications don’t automatically produce an erection. Instead they allow an erection to occur after physical and psychological stimulation. Many men experience improvement in erectile function after taking these medications regardless of the cause of their impotence.
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