Sildenafil vs Cialis: Which ED Treatment Is Right for You?

When choosing between ED treatments, sildenafil and Cialis (tadalafil) are two popular options with different characteristics. Sildenafil, available as both generic tablets and branded Viagra, works within 30-60 minutes and lasts 4-6 hours. Cialis offers longer duration (up to 36 hours) but takes similar time to work. Understanding their differences can help you make an informed decision about which treatment may suit your needs better.

  • Sildenafil tablets work within 30-60 minutes with effects lasting 4-6 hours
  • Cialis (tadalafil) provides longer-lasting effects of up to 36 hours
  • Generic sildenafil offers significant cost savings compared to branded options
  • Both treatments require sexual stimulation to work effectively
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.

Understanding the Key Differences Between These ED Treatments

How Sildenafil and Cialis Work

Both sildenafil tablets and Cialis 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 be effective.

Duration and Timing Differences

The most significant difference between these treatments lies in their duration of action. Sildenafil tablets typically provide effects for 4-6 hours after taking, making them suitable for planned sexual activity. Cialis, on the other hand, can remain effective for up to 36 hours, earning it the nickname "the weekend pill" among some users.

Both medications generally start working within 30-60 minutes of taking them. Food, particularly fatty meals, can delay the onset of action for both treatments, so taking them on an empty stomach or with a light meal is often recommended.

Dosage Options and Flexibility

Sildenafil is available in 25mg, 50mg, and 100mg strengths. Most men start with a 50mg dose, which can be adjusted up to 100mg or down to 25mg based on effectiveness and any side effects experienced. EverydayMeds offers both generic sildenafil tablets and branded Viagra, allowing patients to choose their preferred option at checkout.

Cialis comes in different dosing options including 2.5mg and 5mg for daily use, or 10mg and 20mg for on-demand use. The daily dosing option allows for more spontaneous sexual activity since the medication is always in your system.

Cost Considerations

Generic sildenafil tablets offer excellent value compared to branded alternatives. Since sildenafil contains the same active ingredient as Viagra but at a lower cost, many men choose the generic option for economic reasons. The price difference can be substantial over time, especially for regular users.

Cialis tends to be more expensive per tablet, but some men find the longer duration of action provides better value despite the higher cost per dose.

Side Effects and Tolerability

Both medications share similar potential side effects, including headaches, flushing, nasal congestion, and indigestion. However, some men may tolerate one medication better than the other. Cialis may be associated with back pain in some users, which is less common with sildenafil.

Neither medication should be taken with nitrate medications (such as GTN spray) as this can cause a dangerous drop in blood pressure. Both require a clinical assessment to ensure they're safe and appropriate for your individual circumstances.

Lifestyle Compatibility

Your lifestyle and preferences may influence which treatment works better for you. If you prefer planning sexual activity and want a medication that works for a specific timeframe, sildenafil tablets might be more suitable. If you value spontaneity and don't want to time medication with sexual activity, Cialis might be preferable.

Some men find that alternating between treatments or trying both under medical supervision helps them determine which works best for their situation. At EverydayMeds, our clinical team can help guide this decision through a comprehensive consultation process.

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