Viagra works by blocking PDE-5 from working. This way, blood flow to the penis can occur and not be stopped by PDE-5. This also widens your blood vessels to allow more blood to flow into your penis.

Viagra works by inhibiting an enzyme in the body known as PDE5, short for phosphodiesterase type 5. This enzyme breaks down ...

Viagra (sildenafil) Cialis (tadalafil) Type: PDE5 inhibitor : PDE5 inhibitor : Dosage: 25-100 milligrams (mg), but only once every 24 hours : 2.5-5 mg daily, or 5-20 mg taken as needed ...

Most men and women know at least vaguely what Viagra does, but not everyone knows how it does it. Things You Probably Don't Know About Viagra (Like What It Was Originally Used For) Skip to main ...

Dosage. The amount of Viagra you take affects how long it stays in your system. The smallest available dose, 25 milligrams (mg), won’t last as long as the largest available dose, 100 mg.

Firings and Viagra: What Your Office Janitor Knows Executive assistants, janitors, IT pros and other office workers in support roles know more than you think Illustration: Chantal Jahchan, iStock ...

Viagra and Tau Levels: What It Means. Alzheimer's is defined by two proteins: amyloid and tau. In the Alzheimer’s brain, abnormal levels of specific amyloids clump together, form plaques, and ...

The team was able to find a novel, potent PDE-5 inhibitor, UK-92,480, and they rapidly advanced this compound to the clinic. The initial trials in volunteers were disappointing.

Viagra Could Be Good for Your Brain. Artificial intelligence is allowing scientists to discover new uses for old medications. By . Allysia Finley. Share. Resize. Listen (2 min) ...

At least 5 people out in search of Himalayan Viagra or the Yarsagumba are suspected to be buried in an avalanche in Darchula district of far-west, officials confirmed.