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2. Sildenafil - Wikipedia

   en.wikipedia.org/wiki/Sildenafil

   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 ]

3. Viagra: What It Treats & Its Side Effects ( Plus What It Was ...

   www.aol.com/viagra-treats-side-effects-plus...

   Viagra usually starts working 30 to 60 minutes after taking it. But simply swallowing the little blue pill won’t automatically make you hard — you still have to be aroused, either through ...

4. What Happens If You Take Viagra and You Don't Need It? - AOL

   www.aol.com/happens-viagra-dont-105800158.html

   Viagra could lead to more serious side effects, such as: Priapism (a painful, long-lasting arousal) Vision loss. Chest pain. Flu-like symptoms. Heart attack. Stroke. Dizziness. Sudden low blood ...

5. PDE5 inhibitor - Wikipedia

   en.wikipedia.org/wiki/PDE5_inhibitor

   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.

6. Drugs in pregnancy - Wikipedia

   en.wikipedia.org/wiki/Drugs_in_pregnancy

   Women should speak to their doctor or healthcare professional before starting or stopping any medications while pregnant. [1] Drugs taken in pregnancy including over-the counter-medications, prescription medications, nutritional supplements, recreational drugs, and illicit drugs may cause harm to the mother or the unborn child.

7. How to Take Viagra for Best Results - AOL

   www.aol.com/viagra-best-results-105700318.html

   When to Take Viagra: 30-60 Minutes Before Intimacy, Not Earlier. If you’re planning to have intimacy, it’s best to take your recommended dose of Viagra ahead of time.

8. 4 Common ED Pills: Weighing the Pros & Cons of Each - AOL

   www.aol.com/lifestyle/4-common-ed-pills-weighing...

   Over the last 25 years, (ED) medications like Viagra and Cialis have become common fixtures in bedrooms around the world. Skip to main content. 24/7 Help. For premium support please call: ...

9. Pharmacodynamics - Wikipedia

   en.wikipedia.org/wiki/Pharmacodynamics

   The duration of action of a drug is the length of time that particular drug is effective. [5] Duration of action is a function of several parameters including plasma half-life, the time to equilibrate between plasma and target compartments, and the off rate of the drug from its biological target. [6]