Viagra & Sildenafil Strength Comparison Guide

When considering how to order Viagra on the internet, understanding the different strengths available is crucial for safe and effective treatment. Viagra and its generic equivalent, sildenafil, are available in three strengths: 25mg, 50mg, and 100mg. EverydayMeds offers both branded Viagra and generic sildenafil options, allowing patients to choose based on their preferences and budget. Our UK-licensed prescribers assess each patient individually to determine the most appropriate starting dose and strength for their specific needs.

  • Three available strengths: 25mg, 50mg, and 100mg for both Viagra and sildenafil
  • 50mg is typically the recommended starting dose for most men
  • Dose can be adjusted up to 100mg or down to 25mg based on effectiveness and side effects
  • Generic sildenafil offers the same active ingredient as Viagra at a lower cost
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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.

Understanding Viagra and Sildenafil Dosage Options

Available Strengths and Starting Doses

Both Viagra and sildenafil are available in three standardised strengths: 25mg, 50mg, and 100mg tablets. The 50mg dose is typically recommended as the starting point for most men experiencing erectile dysfunction. This middle-strength option provides an effective balance between therapeutic benefit and potential side effects. Our clinical team at EverydayMeds evaluates each patient's medical history, current medications, and individual circumstances to determine the most appropriate starting dose.

When Lower Doses May Be Recommended

The 25mg strength may be more suitable for certain patients, particularly those who are older, have underlying health conditions, or take medications that could interact with sildenafil. Men with mild kidney or liver impairment may also benefit from starting with a lower dose. Additionally, some patients find that 25mg provides sufficient effectiveness with fewer side effects such as headaches or facial flushing. The lower dose can be particularly appropriate for men who are new to ED treatment or have concerns about potential side effects.

Higher Strength Options

The 100mg strength represents the maximum recommended dose and may be prescribed when 50mg proves insufficient. However, increasing to 100mg should only be considered after at least four attempts with the 50mg dose. It's important to understand that higher doses don't automatically mean better results, and the 100mg strength may increase the likelihood of experiencing side effects. Our prescribers carefully assess whether the potential benefits outweigh the risks before recommending the higher dose.

Branded Viagra vs Generic Sildenafil

EverydayMeds offers both branded Viagra and generic sildenafil, giving patients the choice between options. Both contain the same active ingredient - sildenafil citrate - and work in exactly the same way. The main difference lies in cost, with generic sildenafil typically offering significant savings compared to the branded version. Clinical studies have demonstrated that generic sildenafil has equivalent effectiveness and safety profiles to Viagra. The choice between branded and generic often comes down to personal preference and budget considerations.

Dosing Guidelines and Safety

Regardless of the strength chosen, important dosing guidelines must be followed. Only one tablet should be taken within any 24-hour period, and the medication should be taken approximately 30-60 minutes before sexual activity. Taking sildenafil with fatty meals may delay its effectiveness. The medication's effects can last up to 4-6 hours, though this doesn't mean an erection will last this long. Sexual stimulation is still required for the medication to work effectively.

Clinical Assessment and Personalised Treatment

Before prescribing any strength of Viagra or sildenafil, our UK-licensed prescribers conduct a thorough clinical assessment. This evaluation considers cardiovascular health, current medications, medical history, and potential contraindications. Certain conditions and medications, particularly nitrates used for heart conditions, make sildenafil unsuitable. Our online consultation process ensures that each patient receives a personalised treatment plan with the most appropriate dosage for their individual circumstances, prioritising both effectiveness and safety.

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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