Cialis is one of the best-known treatments for erectile dysfunction in the UK. Its popularity comes largely from the long window in which it can work, giving couples more flexibility and reducing the pressure to plan sex around a narrow timetable.
What exactly is Cialis?
Cialis is a prescription medicine used to treat erectile dysfunction in adult men. Erectile dysfunction means having difficulty achieving or maintaining an erection firm enough for sex. Cialis supports blood flow to the penis during sexual stimulation, making an erection easier to achieve.
The Cialis brand was developed by Eli Lilly and Company. After becoming successful in the United States, it was introduced in other markets and grew into one of the leading erectile dysfunction treatments in Europe and the UK.
The active ingredient in Cialis is tadalafil, which belongs to a group of medicines called PDE5 inhibitors.
The key ingredient: tadalafil
During sexual stimulation, the body releases nitric oxide. Tadalafil blocks the PDE5 enzyme and allows levels of cGMP to remain higher in the erectile tissue. This relaxes smooth muscle and increases blood flow into the penis.
Compared with the other commonly used PDE5 inhibitors—sildenafil and vardenafil—tadalafil stands out because of its long duration. It may remain effective for up to 36 hours, while sildenafil and vardenafil generally provide a shorter window. This is why tadalafil is sometimes called the “weekend pill”.
Tadalafil may be prescribed for:
- erectile dysfunction
- urinary symptoms caused by benign prostatic enlargement
- pulmonary arterial hypertension, using a different specialist dosing schedule.
How does Cialis work?
After sexual stimulation, Cialis helps the blood vessels in the penis relax so that more blood can enter. This can make it easier to achieve and maintain an erection.
Cialis does not work without sexual stimulation. It is not an aphrodisiac and will not improve sexual performance in someone who does not have erectile dysfunction.
Taking a tablet does not guarantee an immediate erection. Arousal, timing, health, stress and the dose all affect the result.
How to use Cialis
Take Cialis as instructed by the doctor, pharmacist or online prescriber who assessed you. Ask for advice if anything in the directions is unclear.
On-demand tadalafil is usually swallowed with water at least 30 minutes before sexual activity. It can be taken with or without food.
Cialis dosage
For on-demand use, 10mg is a common starting dose in the UK. It may be increased to 20mg or reduced depending on effectiveness and side effects. Do not take more than one on-demand dose in 24 hours.
Some men who expect sexual activity at least twice a week may be prescribed a low daily dose of 2.5mg or 5mg. Daily treatment is not the same as taking a 20mg tablet every day.
Do not increase the dose to 40mg or 60mg for erectile dysfunction. If the recommended maximum dose does not work, speak to a clinician about another treatment rather than taking more.
To support the best possible result:
- do not smoke
- limit alcohol
- eat a balanced diet
- exercise regularly
- check the patient leaflet or ask a pharmacist about grapefruit, as it may affect how some medicines are processed.
Expiry and storage
Do not take Cialis after the expiry date shown on the packaging. Return unused or expired medicines to a pharmacy rather than flushing them away or placing them in household waste.
Store the tablets in their original packaging, below the temperature stated in the leaflet and away from moisture and children.
Cialis vs Viagra
Customers often compare Cialis with Viagra, generic tadalafil and Levitra.
The key difference is the active ingredient. Viagra contains sildenafil, while Cialis contains tadalafil. Viagra generally works for around four to six hours. Cialis may remain effective for up to 36 hours.
Both require sexual stimulation and can cause similar effects such as headache, flushing, indigestion and nasal congestion. Tadalafil is also more likely to cause back or muscle pain in some users.
Cialis or Viagra? The better choice depends on how long you want the treatment to last, how your body responds and which side effects you experience.
Note: no PDE5 inhibitor works for every man. If sildenafil or tadalafil does not provide the expected result after several correctly timed attempts, speak to a clinician. Another option may be vardenafil, found in Levitra, or avanafil.
Original Cialis vs generic tadalafil in the UK
Original Cialis was developed by Eli Lilly. Once the relevant patent protection expired, other manufacturers were able to produce generic tadalafil.
“Generic” does not mean counterfeit or lower quality. A legitimate generic contains the same active ingredient and must meet applicable quality standards. Its colour, shape, packaging and inactive ingredients may differ from the original brand.
The main practical difference is often price. Generic manufacturers do not have to recover the original drug-development and brand-marketing costs, so generic tadalafil is usually considerably less expensive.
What do customers say about Cialis?
Many customers have shared their experiences of Cialis and tadalafil. Reviews can help with practical details such as delivery and duration, but individual results vary and customer comments should not replace medical advice.
Excellent result
★★★★★It worked very well for me. My erection difficulties were not severe, but the result in my case was excellent. I ordered on Sunday and it arrived on Tuesday. Andrea
Excellent service and products
★★★★★Impeccable service and excellent products. Recommended. Romeo
A good product
★★★★★I had never tried anything similar before, but this worked well for me. Stefano
Longer lasting than expected
★★★★★The effect was pleasant and lasted much longer than I expected. Massimiliano
Positive reviews do not mean that Cialis is right for everyone. Read the precautions and complete a proper medical assessment before taking it.
What should you know before taking it?
Speak to a doctor or pharmacist before using original Cialis, particularly if you have heart disease. Sexual activity places additional strain on the heart and may be unsafe in some circumstances.
You should also seek advice if you have:
- a penile deformity
- serious kidney problems
- serious liver problems
- sickle-cell anaemia
- multiple myeloma
- leukaemia.
Never take tadalafil with nitrates or recreational nitrites. Stop taking it and seek medical advice if you experience a concerning reaction. Chest pain, sudden loss of vision or hearing, or an erection lasting longer than four hours requires urgent medical attention.
Where can you buy Cialis safely online in the UK?
Buy Cialis here. In the UK, tadalafil is a prescription medicine. It can be obtained from a high-street or online pharmacy after an appropriate assessment.
Online ordering can offer fast, discreet delivery and competitive prices. Use an established supplier with clear company information, secure payment, customer support and transparent product details.
Original Cialis price
The price of original Cialis in the UK depends on the strength, pack size, supplier and any consultation or delivery charges.
Online promotions can reduce the cost, but extremely low prices may indicate a counterfeit or untraceable product. Do not judge authenticity by price alone; check the supplier and packaging as well.
Cialis 20mg prices vary. As an approximate conversion of older pricing, a four-tablet pack may cost around £31 and a 12-tablet pack around £52. Check the current product page before ordering.
Ready to explore the available options?
Below you can read reviews from customers who have used our products:
Similar-looking products may be available online at much lower prices, but a bargain can become expensive if the tablets are counterfeit or of uncertain origin. Before ordering, make sure you are buying a traceable, good-quality product. Seek medical advice before using any treatment that affects your body.
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IMPORTANT: AlfaMedic.co.uk works with established suppliers and aims to source products directly through traceable channels. Our satisfaction and refund policies are explained on the website.

