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

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

    Most men and women know at least vaguely what Viagra does, but not everyone knows how it does it. ... Studies have shown a 70 to 80 percent success rate in patients who use this treatment ...

  3. Is Sildenafil Safe for This Common Male Problem? - AOL

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    After further trials, sildenafil citrate was approved by the Food and Drug Administration (FDA) in 1998 as the active ingredient in brand name Viagra, now a very well-known drug for ED.

  4. How to Get Better Viagra Results in 2025 - AOL

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    How to Use Viagra for Best Results. Viagra is great as an ED treatment, but taking it in particular conditions can make it even more effective. To get the best results from Viagra when treating ...

  5. Sildenafil - Wikipedia

    en.wikipedia.org/wiki/Sildenafil

    Sildenafil's popularity with young adults has increased over the years. [32] Sildenafil's brand name, Viagra, is widely recognized in popular culture, and the drug's association with treating erectile dysfunction has led to its recreational use. [33]

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

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    Headaches are a common side effect of ED medications such as sildenafil (the active ingredient in Viagra), tadalafil (Cialis) and vardenafil (Levitra), with about 25 percent of men prescribed ...

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

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    Recreational Viagra use does happen, and while some men see harmless benefits from the active ingredient in the famous “little blue pill,” they’re still taking a significant risk every time ...

  8. Discovery and development of phosphodiesterase 5 inhibitors

    en.wikipedia.org/wiki/Discovery_and_development...

    The compound was potent and selective over PDE5 but was lacking preferable pharmacological properties. [40] Structure-activity relationship (SAR) is demonstrated in figure 5, figure 6 and figure 7. Figure 5 demonstrates the three main groups of sildenafil, R1, R2 and R3. R1 is the pyrazolopyrimidinone ring, R2 the ethoxyphenyl ring and R3 is ...

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

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

    Viagra (or sildenafil) lasts three to five hours after it’s consumed. Cialis (tadalafil) has a half-life of 17.5 hours, meaning this drug lasts up to 36 hours after it’s consumed.

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