What Will Viagra Do: Essential Facts You Need to Know

Viagra is a prescription medication containing sildenafil citrate that helps treat erectile dysfunction by increasing blood flow to the penis during sexual arousal. Understanding how Viagra works, its effects, and what to expect can help you make informed decisions about ED treatment. At EverydayMeds, we offer both branded Viagra and generic sildenafil options to suit your preferences and budget.

  • Increases blood flow to the penis when sexually aroused - does not cause automatic erections
  • Takes 30-60 minutes to work and effects may last 4-6 hours
  • Available in 25mg, 50mg, and 100mg strengths with 50mg as typical starting dose
  • Requires prescription following online consultation with UK-licensed prescriber
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Not sure which one? Here's the honest comparison.

Sildenafil
~60 min
~4 hrs
you like to plan ahead
Explore now
Tadalafil (as-needed)Most prescribed
~30 min
up to 36 hrs
you want a whole weekend covered
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Tadalafil Daily
always active
continuous
you never want to think about timing
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Vardenafil
~15–30 min
~8 hrs
you want the fastest onset
Explore now

How ED treatment works in your body.

Increases blood flow

Increases blood flow

When PDE5 is suppressed, blood is able to flow more freely through the body—including to the (you guessed it) penis.

Increase erections

Increase erections

More blood flow to the penis means harder, more satisfying erections once you're sexually stimulated.

How Viagra Works and What Effects to Expect

Viagra's Mechanism of Action

Viagra contains sildenafil citrate, which belongs to a class of medications called PDE5 inhibitors. When you take Viagra, it blocks the phosphodiesterase type 5 enzyme, allowing increased blood flow to the penis during sexual arousal. Importantly, Viagra does not cause automatic erections - sexual stimulation is still required for the medication to be effective.

Timeline and Duration of Effects

Most men can expect Viagra to start working within 30-60 minutes of taking the tablet. The medication's effects may last for 4-6 hours, though this does not mean an erection will last this entire duration. Individual response times can vary, and factors like food consumption (particularly fatty meals) may delay the onset of action. For optimal results, consider taking Viagra on an empty stomach or after a light meal.

Available Dosage Options

Viagra is available in three strengths: 25mg, 50mg, and 100mg tablets. The typical starting dose is 50mg, which can be adjusted to 25mg if you experience side effects, or increased to 100mg if the lower dose proves insufficient. Only one dose should be taken within a 24-hour period. At EverydayMeds, patients can choose between branded Viagra or generic sildenafil - both contain the same active ingredient with sildenafil offering a more cost-effective alternative.

Who Can Take Viagra

Viagra is suitable for adult men over 18 experiencing erectile dysfunction. Before prescribing, our UK-licensed prescribers conduct a thorough clinical assessment to ensure the medication is safe and appropriate. This evaluation considers your cardiovascular health, current medications, and medical history. Viagra is not suitable for women or men under 18 years of age.

Important Safety Considerations

Certain individuals should not take Viagra due to potentially serious health risks. The medication is contraindicated for men taking nitrate medications (such as GTN spray), those with severe heart disease, recent heart attack or stroke, severe liver problems, or very low blood pressure. Always disclose all medications and health conditions during your consultation to ensure Viagra is safe for you.

What you need to know about erectile dysfunction

It's one of the most common conditions we treat, and one of the most treatable.

What is Erectile Dysfunction?
ED means finding it hard to get or keep an erection firm enough for sex. It's not unusual to have an off night; the point at which it's worth doing something is when it's happening regularly, or when it's starting to bother you.
How will I feel when I take ED medication?
For most men, nothing feels different day to day. The medication works in the background — when you're sexually aroused, it helps blood flow where it's needed, so erections come more easily and last longer. It doesn't cause arousal on its own. Some men notice mild, short-lived effects like a headache, facial flushing or a stuffy nose, which usually pass as the dose wears off.
Why do I need a prescription for ED medication?
ED treatments are prescription-only medicines in the UK because they aren't suitable for everyone — for example, alongside certain heart conditions or medications like nitrates. That's why we ask you to complete a short online consultation first. A UK-registered prescriber reviews your answers to make sure your chosen treatment is safe and right for you before it's dispensed.
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