Cialis and Viagra are both prescription medications used to treat erectile dysfunction (ED), a condition where a man has difficulty achieving or maintaining an erection sufficient for sexual activity. While they have a similar purpose, there are some differences between the two drugs in terms of how they work, how long they last, and how they are taken.
1.Active Ingredient:
Cialis: The active ingredient in Cialis is tadalafil.
Viagra: The active ingredient in Viagra is sildenafil.
2.Mechanism of Action:
Cialis: Tadalafil, the active ingredient in Cialis, is a phosphodiesterase type 5 (PDE5) inhibitor. It works by increasing blood flow to the penis, which helps a man achieve and maintain an erection when sexually aroused.
Viagra: Sildenafil, the active ingredient in Viagra, also works as a PDE5 inhibitor and increases blood flow to the penis in response to sexual stimulation.
3.Onset of Action:
Cialis: Cialis is often referred to as the "weekend pill" because its effects can last up to 36 hours after taking a single dose. This extended duration allows for more spontaneity in sexual activity.
Viagra: Viagra typically starts working within 30 minutes to an hour after ingestion and its effects can last for around 4 to 6 hours.
4.Dosage Timing:
Cialis: Because of its long duration of action, Cialis can be taken on an as-needed basis, allowing men to plan sexual activity more flexibly.
Viagra: Viagra is also taken on an as-needed basis, but its shorter duration of action may require more precise timing.
5.Dosage Strengths:
Both Cialis and Viagra come in various dosage strengths, allowing doctors to prescribe the appropriate dose based on individual needs.
6.Food Interaction:
Cialis: Cialis can be taken with or without food. Food consumption does not significantly affect its absorption.
Viagra: Taking Viagra with a heavy or fatty meal can delay its onset of action, as the absorption of sildenafil may be slower.
