Sildenafil 50mg vs Cialis: Comparing Your Options

Choosing between sildenafil 50mg and Cialis (tadalafil) for erectile dysfunction treatment? Both are effective PDE5 inhibitors, but they differ in duration, onset time, and cost. Sildenafil, available as generic or branded Viagra, typically works for 4-6 hours and costs less than Cialis. Understanding these differences can help you make an informed choice with your healthcare provider about which treatment may be more suitable for your needs.

  • Sildenafil 50mg works within 30-60 minutes and lasts 4-6 hours
  • Cialis (tadalafil) can last up to 36 hours but costs more
  • Generic sildenafil offers the same effectiveness as Viagra at lower cost
  • Both require prescription following clinical assessment by UK prescriber
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.

Detailed Comparison: Sildenafil vs Tadalafil

How Sildenafil and Cialis Work

Both sildenafil 50mg and Cialis (tadalafil) belong to a class of medications called PDE5 inhibitors. They work by blocking the phosphodiesterase type 5 enzyme, which increases blood flow to the penis during sexual arousal. Neither medication causes automatic erections - sexual stimulation is still required for them to work effectively.

Onset Time and Duration Differences

Sildenafil typically begins working within 30-60 minutes of taking it, with effects lasting approximately 4-6 hours. This doesn't mean an erection lasts this entire time, but rather that the medication remains active in your system. Cialis, on the other hand, can take 30 minutes to 2 hours to work but may remain effective for up to 36 hours, earning it the nickname "the weekend pill".

Cost Comparison and Value

Generic sildenafil offers significant cost savings compared to both branded Viagra and Cialis. At EverydayMeds, patients can choose between generic sildenafil or branded Viagra at checkout, providing flexibility based on personal preference and budget. Cialis generally costs more than both options due to its longer duration of action and patent protection.

Food and Alcohol Interactions

Sildenafil can be affected by food, particularly high-fat meals, which may delay its onset of action. Cialis is less affected by food intake, making it more flexible for meal timing. Both medications can interact with alcohol, potentially increasing the risk of side effects like dizziness or low blood pressure.

Side Effect Profiles

Common side effects for both medications include headache, flushing, indigestion, and nasal congestion. Sildenafil may cause temporary visual disturbances in some patients, while Cialis might cause back pain or muscle aches. Most side effects are mild and temporary, but serious side effects, though rare, require immediate medical attention.

Which Option Might Suit You Better?

Sildenafil 50mg may be preferable if you prefer a shorter duration of action, want a more cost-effective option, or are trying ED medication for the first time. The 50mg dose is typically the starting point, which can be adjusted to 25mg or 100mg based on effectiveness and tolerability. Cialis might be better suited for those wanting more spontaneity in their intimate relationships due to its longer window of effectiveness.

Getting Your Prescription

Both medications require a prescription following consultation with a UK-licensed prescriber. This involves completing a clinical assessment that evaluates your cardiovascular health, current medications, and medical history. At EverydayMeds, this process is straightforward and confidential, with the option to choose between generic and branded versions where available.

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