Sildenafil Tablet Essential Checklist for UK Patients

Our comprehensive sildenafil tablet checklist provides UK patients with essential information for safe and effective erectile dysfunction treatment. Sildenafil, the active ingredient in Viagra, is available in both generic and branded forms. This practical guide covers dosages, eligibility, interactions, and safety requirements to help you make informed decisions about your ED treatment options through our licensed online pharmacy service.

  • Complete clinical assessment with UK-licensed prescriber required
  • Starting dose typically 50mg, adjustable to 25mg or 100mg
  • Take 30-60 minutes before sexual activity, maximum once per 24 hours
  • Choose between generic sildenafil or branded Viagra at checkout
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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.

Complete Sildenafil Treatment Requirements Guide

Dosage and Administration Guidelines

Sildenafil tablets are available in 25mg, 50mg, and 100mg strengths. Most patients begin with 50mg taken approximately one hour before sexual activity. Your prescriber may adjust this to 25mg if you experience side effects, or increase to 100mg if the initial dose proves insufficient. Remember that sexual stimulation is still required - sildenafil enhances natural erectile function rather than creating automatic erections.

Eligibility and Assessment Process

All patients require a clinical assessment by a UK-licensed prescriber before receiving sildenafil tablets. This evaluation examines your cardiovascular health, current medications, and medical history to ensure safe treatment. Men aged 18 and over with erectile dysfunction may be suitable candidates, provided they meet specific health criteria and have no contraindications.

Critical Safety Contraindications

Never take sildenafil if you use nitrate medications such as GTN spray or isosorbide, as this combination can cause dangerous blood pressure drops. Other contraindications include severe heart disease, recent heart attack or stroke within six months, severe liver impairment, very low blood pressure, or allergies to sildenafil. Always disclose your complete medical history during consultation.

Important Drug Interactions

Beyond nitrates, sildenafil may interact with alpha-blockers used for prostate problems or high blood pressure, potentially causing dizziness or fainting. HIV protease inhibitors and certain antifungal medications can increase sildenafil levels in your blood. Blood pressure medications may have enhanced effects when combined with sildenafil. Always inform your prescriber about all medications and supplements you take.

Branded Viagra vs Generic Sildenafil Options

EverydayMeds offers both branded Viagra and generic sildenafil tablets, allowing you to choose your preferred option at checkout. Both contain identical active ingredients and work equally effectively for erectile dysfunction treatment. Generic sildenafil typically costs less whilst providing the same therapeutic benefits as the branded Viagra tablets.

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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