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Chemical structure of sildenafil (Viagra), the prototypical PDE5 inhibitor. A phosphodiesterase type 5 inhibitor (PDE5 inhibitor) is a vasodilating drug that works by blocking the degradative action of cGMP-specific phosphodiesterase type 5 (PDE5) on cyclic GMP in the smooth muscle cells lining the blood vessels supplying various tissues.
Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4] [8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9]
Most of the time, Viagra begins to work 30 to 60 minutes after taking it. ... following tips for how to take Viagra for the best results. ... healthcare provider is aware of any preexisting health ...
WebMD is an American corporation which publishes online news and information about human health and well-being. [4] The WebMD website also includes information about drugs and is an important healthcare information website and the most popular consumer-oriented health site. [5] WebMD was started in 1998 by internet entrepreneur Jeff Arnold. [6]
Whether you’re one of the 30 million men who have (ED) or not, you’ve almost certainly heard of Viagra. Maybe you even know about other ED medications, like Levitra or Stendra or Cialis, too.
For example, a small study of 20 people that looked into Viagra’s effect on refractory time found that a standard 100mg dose of sildenafil citrate reduced the average male post-intimacy recovery ...
The Wikipedia online encyclopedia has, since the late 2000s, served as a popular source for health information for both laypersons and, in many cases, health care practitioners. Health-related articles on Wikipedia are popularly accessed as results from search engines, which frequently deliver links to Wikipedia articles. [1]
Here’s a fun fact, actually: According to Johnson, the main active ingredients of erectile dysfunction medications Cialis and Viagra—tadalafil and sildenafil—work by lowering blood pressure.