Viagra vs Cialis: Which Treatment is Right for You?

Choosing between Viagra and Cialis for erectile dysfunction treatment can be challenging. Both medications are effective PDE5 inhibitors, but they differ in onset time, duration, and dosing flexibility. Understanding these differences can help you make an informed decision with your healthcare provider. EverydayMeds offers both branded Viagra and generic sildenafil options to suit different preferences and budgets.

  • Viagra typically works within 30-60 minutes and lasts 4-6 hours
  • Cialis can work for up to 36 hours, offering more spontaneity
  • Both require sexual stimulation to be effective
  • Generic sildenafil provides the same benefits as branded Viagra at 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 Cialis Differences

How Viagra and Cialis Work

Both Viagra (sildenafil) and Cialis (tadalafil) are PDE5 inhibitors that work by increasing blood flow to the penis during sexual arousal. They block the enzyme phosphodiesterase type 5, which helps maintain an erection when sexually stimulated. Neither medication causes automatic erections - sexual stimulation is still required for effectiveness.

Timing and Duration Differences

Viagra typically begins working within 30-60 minutes of taking and remains effective for 4-6 hours. This makes it suitable for planned sexual activity. Cialis offers two approaches: the standard dose works within 30 minutes and can remain effective for up to 36 hours, whilst daily low-dose Cialis provides continuous readiness. The longer duration of Cialis may appeal to those seeking more spontaneous intimacy.

Dosage and Flexibility

Viagra is available in 25mg, 50mg, and 100mg strengths, with 50mg being the typical starting dose. It should be taken as needed, with a maximum of one dose per 24 hours. Cialis comes as 5mg, 10mg, and 20mg tablets for as-needed use, or 2.5mg and 5mg for daily use. Your prescriber will recommend the most appropriate dosage based on your health profile and preferences.

Food and Alcohol Considerations

Viagra's effectiveness may be reduced by large or fatty meals, which can delay absorption. Cialis is less affected by food, making it more convenient around mealtimes. Both medications can be taken with moderate alcohol consumption, though excessive alcohol may reduce their effectiveness and increase the risk of side effects.

Side Effects and Safety Profile

Both medications share similar side effects, including headaches, facial flushing, nasal congestion, and indigestion. These effects are usually mild and temporary. Viagra side effects typically last 4-6 hours, whilst Cialis side effects may persist longer due to its extended duration. Neither medication is suitable for men taking nitrates or those with certain heart conditions.

Cost Considerations

Branded Viagra is typically more expensive than generic sildenafil, which contains the same active ingredient and offers identical effectiveness. EverydayMeds provides both options, allowing patients to choose between the branded version or the more cost-effective generic alternative. Cialis prices vary depending on whether you choose as-needed or daily dosing.

Making Your Choice

The decision between Viagra and Cialis often depends on lifestyle preferences and individual response. Those who prefer planned intimacy might favour Viagra's shorter window of effectiveness, whilst those seeking spontaneity may prefer Cialis's longer duration. Both require a prescription following consultation with a UK-licensed prescriber who can assess your suitability and recommend the most appropriate option based on your medical history and current medications.

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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