Viagra

How does it work?

Viagra and similar ED drugs work by relaxing muscles and arteries inside the penis, which helps more blood reach the penis. When aroused—and only when aroused—the combination of relaxation and increased blood flow helps fill the penis with blood. That’s how you’re able to achieve an erection. In most cases, Viagra works well and has changed people’s lives for the better.

Viagra can help men who cannot achieve or sustain an erection due to erectile dysfunction. It improves the erectile response when a man is already sexually stimulated, but it does not provide sexual stimulation. If there is no sexual stimulation, viagra will not work.

Is it safe?

Viagra is generally safe to use in moderation. However, taking it may cause a range of adverse effects.

According to clinical trial results, the most common side effects include:

  • headaches
  • nasal congestion
  • impaired vision
  • photophobia, or sensitivity to light
  • indigestion

Factors that can affect how long it lasts:

Several important factors can influence how long Viagra lasts for you:

  • Dosage: The amount of Viagra you take affects how long it stays in your system. The smallest available 25-milligram (mg) dose won’t last as long as the largest available 100-mg dose. But taking a higher dose isn’t always recommended, as it may not be safe for you.
  • Age: As you get older, your metabolism slows down. Thus, Viagra may last longer as you age. In general, you may notice Viagra works for a longer period when you’re 65 or older.
  • Diet: Eating a large meal or a lot of high-fat foods right before you take Viagra can keep it from being metabolized quickly or effectively. But this can also make it last longer as it’s metabolized along with your meal. Drinking alcohol can also decrease blood flow to your penis, making Viagra less effective or shorter-lasting.
  • Medications: Some medications, especially antibiotics, can interact with Viagra and affect how long it lasts.
  • Overall health: Certain existing conditions can affect how long Viagra lasts and how well it works for you. Diabetes, nervous system conditions like multiple sclerosis (MS), and heart conditions like atherosclerosis (fat buildup in your blood vessels) can all make Viagra less effective and not last as long. Some kidney conditions may make Viagra last longer because of the condition’s effect on your metabolism.

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