How Does Viagra Work? Understanding Your ED Options

Viagra works by increasing blood flow to the penis when sexually aroused, helping men achieve and maintain erections suitable for sexual activity. As a PDE5 inhibitor, it blocks the enzyme that restricts blood vessel dilation. At EverydayMeds, we offer both branded Viagra and generic sildenafil, allowing you to choose the most suitable option for your needs and budget whilst receiving the same active ingredient and therapeutic effects.

  • Blocks PDE5 enzyme to improve blood flow to the penis during arousal
  • Takes effect within 30-60 minutes and may last up to 4-6 hours
  • Available in 25mg, 50mg, and 100mg strengths to suit individual needs
  • Generic sildenafil offers identical effectiveness at a more affordable price point
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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.

Viagra vs Sildenafil: Making an Informed Choice

Understanding How Viagra Functions in the Body

Viagra contains sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor that works by blocking enzymes responsible for restricting blood vessel dilation in the penis. When sexually aroused, this mechanism allows increased blood flow, facilitating the achievement and maintenance of erections suitable for sexual intercourse. The medication typically begins working within 30-60 minutes of consumption and its effects may persist for 4-6 hours, though this doesn't mean erections will last continuously during this period.

Branded Viagra vs Generic Sildenafil: Clinical Equivalence

The key difference between branded Viagra and generic sildenafil lies primarily in cost rather than therapeutic effectiveness. Both contain identical active ingredients - sildenafil citrate - in the same concentrations (25mg, 50mg, or 100mg). Generic sildenafil undergoes rigorous testing to demonstrate bioequivalence to the original branded medication, meaning it delivers the same therapeutic benefits whilst offering significant cost savings. Many patients find generic sildenafil provides excellent value without compromising on treatment outcomes.

Dosage Considerations and Treatment Personalisation

Treatment typically begins with a 50mg dose, taken approximately one hour before anticipated sexual activity. Depending on individual response and tolerability, this may be adjusted to 25mg for those experiencing side effects or increased to 100mg if the standard dose proves insufficient. It's crucial to limit consumption to one dose per 24-hour period. Fatty meals may delay the medication's onset of action, so taking it on an empty stomach or after a light meal often proves more effective.

Eligibility and Safety Assessment

Sildenafil requires prescription following consultation with a qualified prescriber who will assess cardiovascular health, current medications, and medical history. The medication is contraindicated for men taking nitrate medications (such as GTN spray), those with severe heart conditions, recent stroke or heart attack, or significant liver impairment. Our clinical team conducts thorough assessments to ensure treatment suitability and safety for each individual patient.

Value Considerations for Long-term Treatment

For ongoing ED management, cost-effectiveness becomes an important factor. Generic sildenafil typically costs significantly less than branded Viagra whilst providing identical therapeutic benefits. This makes it an attractive option for men requiring regular treatment. At EverydayMeds, we provide transparent pricing for both options, enabling informed decision-making based on individual preferences and budget considerations whilst maintaining the highest clinical standards.

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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