What is Viagra? A Complete Partner's Guide

Viagra is a prescription medication containing sildenafil citrate, designed to help men with erectile dysfunction achieve and maintain erections. As the branded version of sildenafil, Viagra works by increasing blood flow to the penis during sexual arousal. Understanding how Viagra functions can help partners support each other through ED treatment. EverydayMeds offers both branded Viagra and generic sildenafil options following online consultation with UK-licensed prescribers.

  • Viagra contains sildenafil citrate, a PDE5 inhibitor that improves blood flow
  • Takes 30-60 minutes to work and requires sexual stimulation to be effective
  • Available in 25mg, 50mg, and 100mg strengths with 50mg as typical starting dose
  • Both branded Viagra and generic sildenafil provide identical therapeutic effects
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Not sure which one? Here's the honest comparison.

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

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 Partners Should Know

Understanding Viagra's Mechanism

Viagra works as a PDE5 inhibitor, blocking the enzyme that restricts blood flow to the penis. When a man is sexually aroused, Viagra helps maintain increased blood flow, supporting the ability to achieve and sustain an erection. Crucially, Viagra does not cause automatic erections - sexual stimulation remains necessary for the medication to be effective.

Timing and Effectiveness

Partners should understand that Viagra typically takes 30-60 minutes to become effective, though this can vary between individuals. The medication's effects can last 4-6 hours, providing a window of opportunity rather than a constant erection. Heavy or fatty meals may delay the onset of action, so timing around meals may be worth considering.

Dosage and Safety Considerations

Viagra is available in 25mg, 50mg, and 100mg tablets, with 50mg being the standard starting dose. Only one tablet should be taken within 24 hours. The prescriber may adjust the dose based on effectiveness and any side effects experienced. Common side effects may include headaches, facial flushing, or indigestion, which are generally mild and temporary.

Branded vs Generic Options

EverydayMeds provides both branded Viagra and generic sildenafil, allowing patients to choose based on preference and budget. Both contain identical active ingredients and provide the same therapeutic effects. Generic sildenafil offers a more cost-effective option while maintaining the same quality standards as the branded version.

Getting Started with Treatment

Treatment begins with an online consultation where a UK-licensed prescriber reviews medical history and current medications. This assessment ensures Viagra is safe and appropriate. Partners can support this process by encouraging open communication about any existing health conditions or medications, as certain drugs like nitrates can interact dangerously with sildenafil.

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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