Sildenafil Citrate Dosage Strengths Guide

Sildenafil citrate is available in three dosage strengths: 25mg, 50mg, and 100mg tablets. Understanding the correct dosage is essential for safe and effective treatment of erectile dysfunction. The typical starting dose is 50mg, taken approximately one hour before sexual activity. EverydayMeds offers both generic sildenafil and branded Viagra options, allowing you to choose based on your preferences and budget during checkout.

  • 25mg tablets - lower strength for those who experience side effects
  • 50mg tablets - standard starting dose for most men
  • 100mg tablets - maximum strength for enhanced effectiveness
  • Maximum one dose per 24-hour period regardless of strength
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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 Sildenafil Dosage Options

Standard Sildenafil Dosage Recommendations

Sildenafil citrate tablets are manufactured in three distinct strengths to accommodate different patient needs and tolerances. The 50mg dose serves as the standard starting point for most men experiencing erectile dysfunction. This moderate strength typically provides effective results while minimising the risk of side effects. Healthcare providers may adjust the dosage based on individual response and tolerability.

When 25mg Strength May Be Recommended

The lower 25mg dose is typically prescribed for men who experience side effects with higher strengths or those taking certain medications that may interact with sildenafil. Older adults or individuals with liver or kidney impairment may also benefit from starting with this reduced dose. Despite being the lowest available strength, 25mg can still provide effective treatment for many patients.

Maximum 100mg Dosage

The 100mg tablet represents the maximum recommended dose of sildenafil citrate within a 24-hour period. This higher strength may be considered for men who do not achieve satisfactory results with lower doses and experience minimal side effects. However, increasing the dose does not necessarily improve effectiveness for all individuals and may increase the likelihood of adverse reactions.

Timing and Administration Guidelines

Regardless of the chosen strength, sildenafil should be taken approximately 30-60 minutes before anticipated sexual activity. The medication requires sexual stimulation to be effective and does not cause automatic erections. Fatty meals may delay the onset of action, so taking sildenafil on an empty stomach or with a light meal is generally recommended for optimal results.

Choosing Between Generic and Branded Options

EverydayMeds provides both generic sildenafil and branded Viagra in all three dosage strengths. Both contain the same active ingredient and are equally effective. The choice between generic and branded versions often comes down to personal preference and cost considerations. Patients can select their preferred option during the checkout process following a successful clinical assessment.

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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