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Cialis Tablets

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What is Cialis?

Cialis, manufactured by Eli Lilly, is a medication used to treat erectile dysfunction.

Tadalafil, the active ingredient, works in as little as 30 minutes and stays in your system for up to 36 hours. Often called 'the weekend pill', Cialis lasts a lot longer than other ED medications like Viagra, which lasts for about 4-6 hours. This allows you to be spontaneous without worrying about the effects wearing off.

The European Medicines Agency (EMA) approved Cialis in November 2002. Since then, it has become one of the most widely used erectile dysfunction treatments, helping millions of men improve their erections.

At euroClinix, we prescribe 10 mg or 20 mg tablets specifically to treat erectile dysfunction.

2.5 mg and 5 mg tablets can also be obtained for once-daily use, although only the 5 mg version is available at euroClinix. When taken regularly, these lower doses maintain a steady level of the active ingredient in your body, allowing for more spontaneous sexual activity without the need to plan ahead.

Is Tadalafil the same as Cialis?

Cialis is just the branded version of generic Tadalafil. The active ingredient, mechanism of action, and intended use are all the same. Some people prefer Cialis over generic versions since it is a well-known brand with a reputation for quality and effectiveness, whereas others prefer generic Tadalafil because of the cheaper price tag.

When deciding on treatment, choose whichever is more suited to your needs. If you are unsure which treatment to choose, use our interactive test here to find the perfect fit.

How does Cialis work?

The active ingredient in Cialis, tadalafil, increases blood flow to the penis when you are sexually aroused.

It works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which normally restricts blood flow by tightening blood vessels. By blocking this enzyme, tadalafil allows the blood vessels to remain relaxed, improving blood flow to the penis.

With blood flow improved, men who take this medicine will find themselves able to achieve and maintain an erection, allowing for more success in the bedroom.

Contrary to popular belief, this medicine only works when you are sexually stimulated, so you won’t experience unexpected or random erections after taking it.

Cialis timeline

What are the benefits of Cialis?

Taking this medication for erectile dysfunction provides several health benefits:

Key benefits of Cialis

Effective for longer Effective for longer

The effects of Cialis can be experienced for up to 36 hours after taking it, earning it the nickname "the weekend pill". In comparison, Viagra lasts for only 4-6 hours

Fast onset of action Fast onset of action

This medicine begins working within 30-60 minutes, giving you the freedom to take it on short notice.

High success rate High success rate

Cialis boasts a high success rate in men who take the medicine to treat their erectile dysfunction.

Convenient dosing Convenient dosing

Cialis is taken as needed, meaning your dosing schedule is not too time-consuming or difficult to maintain.

How effective is Cialis?

Cialis is a proven and effective treatment for erectile dysfunction, as demonstrated in clinical studies.

In one review involving 1,112 men with erectile dysfunction, those taking Cialis reported significantly better results.

According to patient surveys, 81% of men taking Cialis reported improved erections, compared to just 35% in the placebo group.

Efficacy of Cialis

Cialis study results

Percentage of men reporting improved erections

Cialis

81% of men

Placebo

35% of men

Study duration: 12 weeks

Participants: 1,112 men

NOTE: The effectiveness of this medicine may vary between individuals. Factors such as age, overall health, and underlying medical conditions may influence how well it works.

Who can and cannot take Tadalafil?

This medication may not be suitable for everyone. When you complete a consultation, our UK-registered doctors will be able to determine if it is safe for you.

Who can take it?

This medication is suitable for men over 18 experiencing erectile dysfunction.

Who cannot take it?

Do not take Tadalafil if you:

  • Are allergic to any ingredient found in this medicine
  • Have serious heart disease
  • Had a heart attack within the last 90 days
  • Had a stroke within the last 6 months
  • Have low blood pressure or uncontrolled high blood pressure
  • Ever had loss of vision due to stroke of the eye (non-arteritic anterior ischaemic optic neuropathy)

Cautions

While not necessarily contraindications, some conditions mean the safety of this medicine will need to be determined during your consultation. Tell our medical team if you have:

  • Sickle cell anaemia (an abnormality of red blood cells)
  • Multiple melanoma (cancer of the bone marrow)
  • Leukemia (cancer of the blood cells)
  • Any deformation of your penis
  • A serious liver problem
  • A severe kidney problem
  • Had pelvic surgery
  • A removal of all or part of the prostate gland

Please disclose your health status during your online consultation with euroClinix. One of our doctors will evaluate whether Tadalafil is suitable for you and may adjust your medications if needed.

How do I take Cialis?

To use this medicine correctly, follow the dosage and treatment course our medical team prescribes. This ensures the drug's effectiveness and helps avoid side effects.

For best results, take your tablets:

  • With a glass of water
  • On an empty stomach*

*Cialis can be taken with food if necessary, so long as you avoid fatty meals, as high-fat food can make the medicine less effective.

For more detailed advice on how to take this medication, refer to the patient information leaflet sent with your order.

Dosage

Cialis erectile dysfunction tablets are available in four dosages: 2.5 mg, 5 mg, 10 mg, and 20 mg.

The recommended starting dose is one 10 mg tablet before sexual activity, but your doctor may prescribe you more or less depending on your individual circumstances. The maximum dose of Cialis per day is 20 mg. Do not take more than this and do not take more than one dose in a 24-hour period.

Cialis Dosages
Dosage When to use Consideration
2.5 mg* Daily as a continuous treatment Lower dosage to be used if you have underlying conditions
5 mg Daily as a continuous treatment Average dose for daily treatment
10 mg As needed (30-60 minutes before sexual activity), not for daily use Recommended starting dose for as-needed treatment
20 mg As needed (30-60 minutes before sexual activity), not for daily use Higher dose if 10 mg is ineffective

*At euroClinix, we do not currently stock the 2.5 mg dosage. Consult our medical team to explore all of your treatment options.

When do I take it?

You should take your tablet 30-60 minutes before sexual activity.

You do not need to take it if you are not trying to have sex, and you should not use it more than once a day.

Cialis Once Daily

Take one tablet (2.5 mg or 5 mg) at the same time every day.

How long does Cialis take to work?

How long Cialis works can differ between individuals. Usually, you should start to notice the effects within 30-60 minutes, but results peak at 1-2 hours after you take your tablet.

The effects of this medicine can last for up to 36 hours. Do not take more within this timeframe, even if you plan to have sex again; the medicine should still be effective.

Once-daily tablets should work within 3-5 days of daily use.

What lifestyle changes should I make while taking Cialis?

While effective on its own, you can make some lifestyle changes alongside treatment to improve your condition further. Follow these tips to get the maximum effect from Cialis.

Lifestyle guide for Cialis

Maintain a healthy weight Maintain a healthy weight

Excess body weight can negatively impact cardiovascular health and blood flow. Aim for a balanced diet to improve sexual performance.

Calculate your BMI to determine if you are a healthy weight and could benefit from weight loss.

Stop smoking Stop smoking

Smoking can damage blood vessels and reduce blood flow to the penis. Quitting smoking can improve erections.

Erectile dysfunction is no more common in former smokers than it is in non-smokers, which implies that quitting now can reverse any damage done.

Maintain a healthy diet Maintain a healthy diet

Certain foods can support sexual function and make Cialis more effective.

Include more fatty fish and leafy greens while avoiding saturated fats.

Exercise regularly Exercise regularly

Consistent physical activity improves cardiovascular health and boosts testosterone, possibly improving sexual function.

Aim for at least 150 minutes of moderate exercise per week if possible.

Manage stress Manage stress

Stress can increase cortisol levels, which are responsible for lowering testosterone. This can lower your sex drive and affect your ability to maintain an erection.

Practice stress-reducing techniques like meditation, yoga, and deep breathing if you feel overly stressed.

Consult with a healthcare professional before making significant lifestyle changes

Eat a diet rich in fruits, vegetables, whole grains, lean proteins, and healthy fats to improve blood flow and heart health, which are important for erectile function. Avoid high-fat, processed foods, as these can contribute to heart problems and worsen ED.

Silvia Fonda Nutritionist

What are the side effects of Cialis?

This medication may produce side effects. These are usually mild and should go away in a few days.

Cialis’ side effects are usually mild and should go away in a few days.

Consult your doctor if side effects are persistent or unmanageable.

Common side effects (may affect up to 1 in 10 people)
  • Headache
  • Back pain
  • Muscle aches
  • Pain in arms and legs
  • Facial flushing
  • Nasal congestion
  • Indigestion
Uncommon side effects (may affect up to 1 in 100 people)
  • Dizziness
  • Stomach ache
  • Feeling or being sick
  • Blurred vision
  • Eye pain
  • Difficulty breathing
  • Blood in urine
  • Prolonged erection
  • Pounding heartbeat
  • Fast heart rate
  • High or low blood pressure
  • Nose bleeds
  • Ringing in the ears
  • Swelling of the hands, feet or ankles
  • Tiredness
Rare side effects (may affect up to 1 in 1,000 people)
  • Fainting
  • Seizures
  • Swelling of the eyelids
  • Red eyes
  • Hearing loss
  • Skin changes
  • Bleeding of the penis
  • Increased sweating

The following side effects may be a sign of something serious. If you experience any of these symptoms, stop using this medicine and seek immediate medical help.

Serious side effects
  • Allergic reactions - symptoms include difficulty breathing, a skin rash, fever, or swelling of the face or throat.
  • Chest pain - do not use nitrates as they can drop blood pressure dangerously low.
  • A prolonged and possibly painful erection - contact a doctor if an erection lasts for longer than 4 hours.
  • Sudden loss of vision - seek immediate medical help, as this could become permanent if not treated.

How to manage side effects

Most side effects, like headaches, flushing, and indigestion, are usually mild and subside after a few hours. To manage these side effects, drink plenty of water and avoid alcohol.

For muscle aches or back pain, try not to overstrain yourself. Get plenty of rest and avoid intense exercise for the duration of the side effects.

Mild side effects shouldn’t require medical help, but some side effects are more serious.

To manage common side effects like headaches or flushing, stay hydrated and avoid excessive quantities of alcohol. If your symptoms are persistent or severe, consult your doctor for professional help

Dr. Caroline Fontana Lead Prescribing Doctor

For more detailed information, please refer to the patient information leaflet.

What interacts with Cialis?

Some medicines may interfere with the effectiveness of Cialis or increase the risk of side effects. Tell your doctor about any medication you take, including the following:

Can increase tadalafil levels

The following medicines may increase the levels of tadalafil (the active ingredient) in the blood.

  • Antifungals (e.g., Ketoconazole, Itraconazole)
  • Antibiotics (e.g., Erythromycin, Clarithromycin)
  • HIV medications (e.g., Ritonavir)
  • Grapefruit or grapefruit juice

Can lower tadalafil levels

The following medicines may lower the levels of tadalafil in the blood.

  • Drugs that speed up drug breakdown (e.g., Rifampicin, Phenytoin, Carbamazepine)

Can significantly lower blood pressure

The following medicines may dangerously lower blood pressure.

  • Blood pressure medications (e.g., nitrates, Doxazosin)
  • Pulmonary hypertension medications (e.g., Riociguat)

This list does not cover all possible interactions. For a comprehensive list, please visit the interactions checker on the BNF website.

What safety advice should be followed when taking Cialis?

Category Safety Advice
Alcohol Caution Alcohol can temporarily impair your ability to get and maintain an erection. Limit your alcohol intake before sexual activity.
Lactose Consult your doctor This medicine contains lactose. Consult your doctor before use if you have been told you are lactose intolerant.
Driving Caution This medicine can cause dizziness and affect your vision. You should be aware of how you react to this drug before driving or operating machinery.
Hydration Important Proper hydration can positively affect blood circulation, possibly improving the drug’s effectiveness and reducing the risk of side effects.

How should I store Cialis?

This medication does not require any special storage instructions. To safely store your tablets, follow these general guidelines:

  • Do not use this medicine after the expiry date
  • Keep this medicine out of the sight and reach of children
  • Do not throw away medicines via wastewater or household waste.*

*Take any unused medication to your local pharmacy for proper disposal. These measures help to protect the environment.

Can I buy Cialis without a prescription?

No, Cialis can only be obtained with a prescription from a licensed healthcare provider.

Prescriptions are necessary because they:

  • Ensure appropriate use for your specific condition.
  • Prevent potential misuse and associated health risks.
  • Allow for monitoring of side effects and interactions with other medications.

How do I buy Cialis online from euroClinix?

Ordering Cialis online from euroClinix is convenient.

Follow these simple steps:

  1. Complete a quick online consultation to check your eligibility.
  2. UK-registered doctors review your responses to ensure the medication is right for you.
  3. Upon approval, an e-prescription will be issued.
  4. Enjoy free delivery from our licensed pharmacy with tracking details.

Your privacy is our top priority. euroClinix uses secure, encrypted transactions and complies with UK medical standards to keep your information confidential.

Start your online consultation today to enjoy professional care from the comfort of your home.

Why should I choose euroClinix?

euroClinix is trusted by thousands of users in the UK for its safe and convenient service. Here’s why:

  • Experienced doctors manage your consultations and prescriptions.
  • Online consultations, swift approvals, and discreet doorstep delivery make ordering quick and convenient.
  • A supportive team is on hand to answer treatment-related questions or concerns.
  • Patients can manage their prescriptions hassle-free through our secure platform.

Join thousands who trust euroClinix for their healthcare needs and take control of your health today.

How much does Cialis cost?

The price of Cialis at euroClinix includes everything you need:

  • Free online consultation with our experienced doctors
  • Free prescription, if approved
  • Free delivery straight to your door

Our pricing is transparent, with no hidden fees. Order today and benefit from our complete, all-inclusive service.

What alternatives are available?

If this treatment is not right for you, there are other erectile dysfunction tablets available to treat your condition.

Medication Key features Time to work Effect duration Price range When to take Typical dose Efficacy Ideal for
Cialis Longest-lasting effects, the “weekend pill” 30-60 minutes Up to 36 hours - 30-60 minutes before sex 10 mg Up to 64% effective Long-lasting treatment
Sildénafil Same as Viagra, lower price 30-60 minutes Up to 4 hours - 1 hour before sex 50 mg Up to 84% effective Reliable treatment at a lower price
Viagra Most well-known and studied 30-60 minutes Up to 4 hours - 1 hour before sex 50 mg Up to 84% effective A trustworthy and popular treatment
Tadalafil Same as Cialis, lower price 30-60 minutes Up to 36 hours - 30-60 minutes before sex 10 mg Up to 64% effective Long-lasting treatment at a low price
Cialis Daily Taken daily, ongoing effects 3-5 days of daily use Continuous - At the same time each day 5 mg Up to 96% effective Daily dosing and ongoing effects
Vardenafil Highly tolerable for most people 30-60 minutes Up to 5 hours - 25-60 minutes before sex 10 mg Up to 80% effective Those not suited to other treatments
Spedra Fastest-acting 15-30 minutes Up to 5 hours - 15-30 minutes before sex 100 mg Up to 85% effective Fast-acting treatment
ED trial pack Includes Sildenafil, Tadalafil, and Vardenafil Varies per medication Varies per medication - Varies Varies Efficacy varies Exploring multiple treatment options

Cialis FAQs

Is 20 mg Cialis equal to 100 mg Viagra?
Can women take Cialis?
Does Cialis lower blood pressure?
Does Cialis make you last longer?
Can you take Viagra and Cialis together?
How many years can you take Cialis for?
How long does Cialis stay in your system?
Is Tadalafil (generic Cialis) used for benign prostatic hyperplasia (enlarged prostate)?
Are there any discounts for being a new user?
Is it safe to order online?
Will my order be confidential?
What are the delivery options available?

Note: You must complete a short online consultation so that our doctor can ensure that the treatment is suitable for you. The above pricing should only be used as a reference. The final decision to issue this treatment lies with the prescribing doctor.

Medically reviewed by Dr. Caroline Fontana Written by our editorial team Last reviewed 06-02-2025
Cialis information
Type of medicinePDE5 Inhibitor
Used forTreatment of erectile dysfunction
Active ingredient(s)Tadalafil
Works byTemporarily increasing blood flow to the penis when you are sexually aroused
Effective within30-60 minutes
Available asTablets
Available dosage(s)5 mg, 10 mg, 20 mg
Usage instructionsTake one tablet 30-60 minutes before sexual activity
ManufacturerEli Lily
Generic available?Yes (Tadalafil available as generic)
StorageKeep at room temperature in the original packaging. Protect from moisture and direct heat
Prescription required?Yes, get it with our FREE online consultation
Who is suitable for an online consultation*Men over 18 with erectile dysfunction

*Note: Our medical team must review your online consultation before approving this treatment. They will determine if the requested treatment and quantity are safe, appropriate, and effective for you.

Cialis reviews
Box of Cialis® 20mg tadalafil 4 film-coated tablets Excellent 4.6 801 patients have reviewed Cialis on Trustpilot
24 Jan

Good stuff

Fred Macey
12 Jul

first class service with next day delivery

Kaupp Thomas c/o Safram SA
16 May

all in really perfect

Kaupp Thomas c/o Safram SA

Further reading

Viagra and how it reacts with other medicines

Viagra and how it reacts with other medicines

Reviewed by Dr. Caroline Fontana
Viagra: the side effects explained

Viagra: the side effects explained

Reviewed by Dr. Caroline Fontana
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