Cialis vs Tadalafil: side-by-side comparison
Cialis and Tadalafil share the same active ingredient — Tadalafil — which makes them direct alternatives. The practical differences are brand, manufacturer (Eli Lilly vs Various generics), available strengths and price. This comparison summarises what is the same, what differs, and when each is typically preferred.
| Property | Cialis | Tadalafil |
|---|---|---|
| Active ingredient | Tadalafil | Tadalafil |
| Manufacturer | Eli Lilly | Various generics |
| Class | Erectile Dysfunction (ED) | Erectile Dysfunction (ED) |
| Strengths | 2.5mg, 5mg, 10mg, 20mg | 5mg, 10mg, 20mg |
| Forms | tablet | tablet |
What's the same
Both medications contain Tadalafil. Clinical efficacy is comparable at equivalent doses, and the choice usually comes down to brand, price and availability.
Key differences
Although both contain Tadalafil, they differ in brand (Cialis vs Tadalafil), manufacturer (Eli Lilly vs Various generics), excipients, tablet appearance, available strengths (2.5mg, 5mg, 10mg, 20mg vs 5mg, 10mg, 20mg) and price.
Mechanism and action
Cialis: During sexual stimulation, nitric oxide is released in the corpus cavernosum and activates an enzyme that produces cyclic GMP. Tadalafil: The mechanism is identical to original Cialis: tadalafil selectively inhibits PDE5 in penile and vascular smooth muscle, allowing cyclic GMP produced during sexual arousal to accumulate.
When Cialis is preferred
Cialis is indicated in adult men for the treatment of erectile dysfunction.
When Tadalafil is preferred
Generic tadalafil shares the indications of the originator: erectile dysfunction in adult men, lower urinary tract symptoms associated with benign prostatic hyperplasia, and pulmonary arterial hypertension at adapted doses.
Frequently asked questions
Is Cialis or Tadalafil better? ▾
Neither is universally better — they share the same active ingredient Tadalafil and are clinically equivalent at comparable doses. The choice usually comes down to brand, available strength, supply and cost.
Can I switch from Cialis to Tadalafil? ▾
Switching between Cialis and Tadalafil is usually straightforward as both share Tadalafil. Equivalent dose and schedule are confirmed by the prescriber or pharmacist.
Do Cialis and Tadalafil have the same side effects? ▾
Generally yes. Sharing Tadalafil, the side-effect profile is comparable. Minor differences can come from excipients and formulation.
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The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.