Viagra Tablet Strengths: Complete UK Dosage Guide

Viagra is available in three dosage strengths in the UK: 25mg, 50mg, and 100mg tablets. The standard starting dose is typically 50mg, taken approximately one hour before sexual activity. Your prescriber may adjust the dose to 25mg or 100mg based on effectiveness and any side effects experienced. EverydayMeds offers both branded Viagra and generic sildenafil options during checkout.

  • 25mg - Lower strength for men who experience side effects or have certain health conditions
  • 50mg - Standard starting dose recommended for most men with erectile dysfunction
  • 100mg - Maximum strength for men who don't respond adequately to lower doses
  • All strengths require prescription following clinical assessment by 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
Explore now
Tadalafil Daily
always active
continuous
you never want to think about timing
Explore now
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.

Understanding Viagra Dosage Options and Pricing

Available Viagra Tablet Strengths

Viagra tablets are manufactured in three distinct strengths: 25mg, 50mg, and 100mg. Each strength contains the same active ingredient, sildenafil citrate, but in different concentrations to allow for personalised treatment. The 50mg strength serves as the standard starting dose for most men, whilst the 25mg and 100mg options provide flexibility for dose adjustment based on individual response and tolerability.

How Dosage Affects Viagra Tablet Prices

Viagra tablet prices typically vary according to strength and pack size. Higher strength tablets (100mg) may cost more per tablet than lower strengths, though price per milligram of active ingredient often decreases with higher strengths. EverydayMeds offers transparent pricing for all Viagra strengths, with the option to choose between branded Viagra or generic sildenafil at checkout. Generic sildenafil contains the same active ingredient but typically costs significantly less than branded Viagra.

Choosing the Right Strength

Your prescriber will determine the appropriate starting dose based on several factors including your age, overall health, current medications, and any underlying medical conditions. Men over 65 or those with liver or kidney problems may be started on the lower 25mg dose. The 50mg strength works effectively for most men, whilst the 100mg dose is reserved for those who don't achieve adequate results with lower strengths. It's important never to exceed one tablet per 24-hour period, regardless of strength.

Adjusting Your Dose Safely

Dose adjustments should only be made under medical supervision through follow-up consultations. If the 50mg strength doesn't provide sufficient improvement, your prescriber may increase the dose to 100mg. Conversely, if you experience bothersome side effects, reducing to 25mg may be recommended. EverydayMeds' clinical team can review your treatment progress and adjust prescriptions accordingly during online consultations.

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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