Cialis is a prescription treatment for erectile dysfunction that helps improve blood flow, making it easier to achieve and maintain an erection when sexually stimulated. Its key benefit is long-lasting action, with effects that can last up to 36 hours, allowing for greater flexibility and spontaneity compared to some other treatments.
Erectile dysfunction (ED) is very common.
Many men experience it at some point in their life.
Cialis is a well-known treatment for erectile dysfunction.
It is effective, long-lasting, and trusted by doctors worldwide.
This guide explains Cialis in a simple way.
No medical jargon.
Just clear answers.
Erectile dysfunction (ED) is very common.
Many men experience it at some point in their life.
Cialis is a well-known treatment for erectile dysfunction.
It is effective, long-lasting, and trusted by doctors worldwide.
This guide explains Cialis in a simple way.
No medical jargon.
Just clear answers.
What Is Cialis?
Cialis is a tablet used to treat erectile dysfunction.
It helps men get and keep an erection.
The active ingredient is tadalafil.
This improves blood flow to the penis.
Cialis only works when you are sexually stimulated.
It does not increase sex drive.
How Does Cialis Work?
Cialis relaxes blood vessels.
This allows more blood to flow to the penis.
Better blood flow helps create an erection.
It also helps keep the erection firm.
Cialis works naturally with your body.
Sexual arousal is still needed.
How Long Does Cialis Last?
This is one of the main benefits of Cialis.
Cialis can work for up to 36 hours.
This is much longer than most other ED treatments.
Because of this, Cialis is often called
“the weekend pill.”
You do not need to rush.
Sex can happen more naturally.
How Quickly Does Cialis Work?
Cialis usually starts working within 30 to 60 minutes.
For some men, it may take slightly longer.
You do not need to time it exactly.
This gives more flexibility.
Cialis Dosage Options
Cialis comes in different strengths.
The right dose depends on your needs.
Common doses include:
- 2.5 mg – daily low dose
- 5 mg – daily use
- 10 mg – taken when needed
- 20 mg – maximum dose
Your prescriber will decide what is best for you.
This is based on your health and response.
Daily Cialis vs As-Needed Cialis
Some men take Cialis every day.
Others take it only before sex.
Daily Cialis:
- Taken once a day
- Lower dose
- Allows spontaneous sex
As-needed Cialis:
- Taken before sexual activity
- Higher dose
- Long-lasting effect
Both options are effective.
Your prescriber will guide you.
Who Can Use Cialis?
Cialis is suitable for many men with ED.
It can help if ED is caused by:
- Stress or anxiety
- Age-related changes
- Poor circulation
- Diabetes (in some cases)
Cialis may not be suitable if you:
- Take nitrate medicines
- Have serious heart problems
- Have very low blood pressure
- A medical consultation is always required.
Cialis Side Effects
Most men tolerate Cialis well.
Common side effects include:
- Headache
- Indigestion
- Back pain
- Muscle aches
- Facial flushing
These side effects are usually mild.
They often improve with time.
Get medical help if you have:
- Chest pain
- Sudden vision or hearing loss
- An erection lasting over 4 hours
Cialis vs Viagra – What’s the Difference?
Both medicines treat erectile dysfunction.
But they work slightly differently.
Cialis:
- Lasts up to 36 hours
- More flexible timing
- Can be taken daily
Viagra:
- Lasts around 4 hours
- Needs more planning
- Works faster for some men
Neither is “better.”
It depends on your lifestyle and needs.
Is Cialis Safe?
Yes, when prescribed properly.
Cialis has been used for many years.
It is approved for use in the UK.
The key is medical supervision.
Never buy from unregulated websites.
Fake medicines are common online.
They can be dangerous.
How to Buy Cialis Online in the UK Safely
Cialis is a prescription-only medicine in the UK.
To buy it legally, you must:
- Complete a medical consultation
- Be reviewed by a qualified prescriber
A safe online clinic like London Luton Clinic will:
- Ask health questions
- Check current medications
- Issue a prescription if suitable
- Deliver medication discreetly
Why Use an Online London Luton Clinic?
Online treatment is simple and private.
Benefits include:
- No GP appointment
- No pharmacy queues
- Discreet home delivery
- Fast access to treatment
- Everything is done securely online.
Final Thoughts
Erectile dysfunction is common.
You are not alone.
Cialis is an effective treatment.
It is long-lasting and flexible.
When used correctly, it can improve confidence,
relationships, and quality of life.
If ED is affecting you, help is available.
Safe, legal treatment starts with a consultation.
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About the Author
Rupesh Shah, Independent Prescriber & Pharmacist
GPhC Registered | 20+ years clinical experience
Rupesh Shah is a UK-registered pharmacist and independent prescriber with extensive experience in men’s health, erectile dysfunction treatments, and online prescribing services. He is the Clinical Lead at London Luton Clinic and is committed to providing safe, evidence-based care.
Medical Review
Medically reviewed by: Rupesh Shah, Independent Prescriber
Last reviewed: 13 January 2026
This article has been medically reviewed to ensure clinical accuracy, safety, and compliance with UK prescribing guidelines.
Medical Disclaimer
This article is for general information only and does not replace a consultation with a qualified healthcare professional. Always seek medical advice before starting treatment.
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Sources & References
- NHS. Erectile dysfunction (impotence)
- NICE Clinical Knowledge Summaries – Erectile Dysfunction
- British National Formulary (BNF). Tadalafil
- Electronic Medicines Compendium (EMC). Cialis (tadalafil) – SPC
- MHRA guidance on prescription medicines and online safety
- European Association of Urology Guidelines on Sexual and Reproductive Health
