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  2. 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 ...

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

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

    Like any medication, side effects of Viagra may come with its many benefits. Still, Viagra is safe when used as directed. ... over-the-counter nitrate supplements (like amyl nitrate, isosorbide ...

  4. Your ED Pill Guide: Everything You Need to Know Before ... - AOL

    www.aol.com/ed-pill-guide-everything-know...

    Some of the most common side effects of ED meds include headaches, dizziness, upset stomach, back pain and nasal congestion. A healthcare provider can help you determine which ED medication and ...

  5. 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]

  6. 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.

  7. Got Headaches from Viagra or Cialis? Here's Why & How to Treat It

    www.aol.com/got-headaches-viagra-cialis-heres...

    Like many other side effects of Viagra, headaches can become more common if you use a high dose of the medication or if you use Viagra, Cialis or Levitra frequently. ... If Necessary, Use Over-the ...

  8. Herbal viagra - Wikipedia

    en.wikipedia.org/wiki/Herbal_viagra

    The name "herbal viagra" is taken from the brand name Viagra, under which drug company Pfizer sells sildenafil citrate, a drug used to treat erectile dysfunction. [3] Viagra has become a generic term for many people discussing drugs designed to treat erectile dysfunction, even those which do not contain sildenafil. [4]

  9. Cialis vs. Viagra: How Are They Different? - AOL

    www.aol.com/cialis-vs-viagra-different-175700354...

    As we mentioned, most of the time, side effects from ED medications get better over time. But because Cialis has a much longer half-life than Viagra, you may experience Cialis side effects for longer.