Viagra vs Sildenafil: Understanding Your Options

When considering erectile dysfunction treatment, many men wonder about the difference between Viagra and sildenafil. Both contain the same active ingredient - sildenafil citrate - but differ in branding and cost. Understanding how these medications work and their key differences can help you make an informed choice. EverydayMeds offers both branded Viagra and generic sildenafil options, allowing you to select the treatment that best suits your needs and budget during our consultation process.

  • Both contain identical active ingredient (sildenafil citrate) with same effectiveness
  • Generic sildenafil typically costs significantly less than branded Viagra
  • Both work by increasing blood flow to improve erectile function
  • Available in same dosage strengths (25mg, 50mg, 100mg)
Start your free consultation

Takes less than 2 minutes to complete, 100% online

More pleasure. Less waiting. Built to last.

Get Started

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.

How Viagra and Sildenafil Work in Your Body

The Science Behind Sildenafil

Both Viagra and generic sildenafil work by blocking an enzyme called phosphodiesterase type 5 (PDE5). This action helps relax blood vessels in the penis, allowing increased blood flow when you become sexually aroused. It's important to understand that these medications don't cause automatic erections - sexual stimulation is still required for them to be effective.

Identical Active Ingredients, Different Packaging

The key point many patients don't realise is that Viagra and sildenafil contain exactly the same active ingredient. Viagra is simply the brand name created by Pfizer, whilst sildenafil is the generic version. Both undergo the same rigorous testing and meet identical quality standards set by the MHRA (Medicines and Healthcare products Regulatory Agency).

Timing and Duration of Effects

Whether you choose branded Viagra or generic sildenafil, the timing remains consistent. Both typically begin working within 30-60 minutes of taking the tablet. The effects can last up to 4-6 hours, though this doesn't mean you'll have an erection for this entire period. Food, particularly fatty meals, may delay the onset of action for both formulations.

Dosage Options Available

EverydayMeds offers both Viagra and sildenafil in three strengths: 25mg, 50mg, and 100mg. Most men start with the 50mg dose, which can be adjusted up to 100mg or down to 25mg depending on effectiveness and any side effects experienced. Your prescriber will recommend the most appropriate starting dose based on your medical history and current medications.

Cost Considerations

Generic sildenafil typically costs considerably less than branded Viagra, often representing savings of 70-80%. This makes sildenafil an attractive option for men seeking effective ED treatment whilst managing healthcare costs. Both versions require a prescription following consultation with a UK-licensed prescriber, ensuring you receive appropriate medical oversight regardless of your choice.

Safety Profile and Side Effects

Since both medications contain identical active ingredients, their side effect profiles are the same. Common side effects may include headaches, facial flushing, indigestion, and nasal congestion. These effects are usually mild and temporary. More serious side effects are rare but can include sudden vision or hearing loss, or prolonged erections lasting over four hours, which require immediate medical attention.

Who Cannot Take These Medications

Both Viagra and sildenafil have identical contraindications. Men taking nitrate medications (such as GTN spray), those with severe heart conditions, recent stroke or heart attack survivors, or men with severe liver problems should not use these treatments. This is why our online consultation process thoroughly reviews your medical history and current medications before prescribing.

Making Your Choice

When deciding between Viagra and sildenafil, consider that effectiveness remains identical. Your choice may depend on personal preference for branded medications versus cost considerations. Some men prefer the familiarity of the Viagra brand, whilst others appreciate the cost savings offered by generic sildenafil. At EverydayMeds, you can choose between both options during checkout following your approved consultation.

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.
Couple laughing together

How it works

Achieve your goals in just a few simple steps.

Step 1

Start Free Consultation

Select safe UK treatments. Quick answers.

Step 2

Review By Our Clinical Team

Our expert team will use your consultation as the basis of our recommendation and communicate with you.

Step 3

Get it delivered fast

We’ll deliver direct to you, as quickly as tomorrow.

Frequently asked questions