Tadalafil is a prescription treatment used in the UK to treat erectile dysfunction by improving blood flow and supporting long-lasting erections. It is known for its extended duration of action, working for up to 36 hours, which allows for greater spontaneity.
Tadalafil is a trusted treatment for erectile dysfunction (ED). Known widely as the active ingredient in Cialis, Tadalafil helps men achieve and maintain an erection when sexually stimulated. In this guide, we explain its uses, recommended dosage, side effects, and how to buy Tadalafil online safely in the UK.
Tadalafil is a trusted treatment for erectile dysfunction (ED). Known widely as the active ingredient in Cialis, Tadalafil helps men achieve and maintain an erection when sexually stimulated. In this guide, we explain its uses, recommended dosage, side effects, and how to buy Tadalafil online safely in the UK.
How Tadalafil Works
Tadalafil works by relaxing blood vessels in the penis. This allows more blood to flow during sexual arousal. Unlike some treatments, Tadalafil can last up to 36 hours, earning it the nickname “the weekend pill.”
It is important to note that Tadalafil only works with sexual stimulation. It does not cause an automatic erection.
Uses of Tadalafil
Tadalafil is used primarily for erectile dysfunction. It can also be prescribed for benign prostatic hyperplasia (BPH) or high blood pressure in the lungs.
Men using Tadalafil report improved sexual confidence, better performance, and a higher quality of life. Always follow your doctor’s instructions for safe and effective use.
Men using Tadalafil report improved sexual confidence, better performance, and a higher quality of life. Always follow your doctor’s instructions for safe and effective use.
Recommended Dosage
Tadalafil comes in different strengths, usually 5 mg, 10 mg, and 20 mg.
As needed: Take 10 mg about 30 minutes before sexual activity. Do not exceed 1 dose per day.
Daily use: 2.5–5 mg once daily at the same time each day, regardless of sexual activity.
Dosage may vary based on age, health conditions, and other medications. Always consult a healthcare professional before starting Tadalafil.
Side Effects and Safety
Tadalafil is generally safe when taken as prescribed. Common side effects include:
Headache
Flushing
Indigestion
Muscle aches
Dizziness
Do not take Tadalafil if you use nitrate medications or have severe heart problems. Always disclose your full medical history to your doctor before taking this medicine.
Buying Tadalafil Online Safely
Buying Tadalafil online in the UK is convenient, but safety is key. Always choose:
Licensed pharmacies with verified registration
Prescription-based sales to ensure correct dosage
Discreet and secure delivery
Avoid unverified websites, as counterfeit Tadalafil can be dangerous and ineffective. Trusted online pharmacies offer affordable prices and professional guidance.
Tadalafil vs Cialis
Generic Tadalafil contains the same active ingredient as Cialis. The effect is identical, but generics are usually more affordable. Both options are safe if purchased from licensed sources.
Conclusion
Tadalafil UK is a safe, effective, and reliable solution for erectile dysfunction. Understanding its uses, dosage, side effects, and how to buy it online safely helps men make informed decisions.
Choose licensed pharmacies, follow dosage instructions, and enjoy improved sexual health confidently.
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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). Tadalafil (Cialis) – Summary of Product Characteristics (SPC)
- Medicines and Healthcare products Regulatory Agency (MHRA). Guidance on prescription medicines and buying medicines online safely
- European Association of Urology (EAU). Guidelines on Sexual and Reproductive Health
