cialis vs viagra

A Quick Comparison of Cialis vs Viagra

V iagra and Cialis are two popular erectile dysfunction treatments. We compare several factors including how fast they work, cost, duration, effectiveness and more. Find out which treatment is more effective for you!


Cialis (Tadalafil) Viagra (Sildenafil)
Price Prices $10-$62 cap/tab Prices $2-$62 cap/tab
Prescription required? Yes Yes
Active ingredient
Tadalafil Sildenafil
Dosage Available in 2.5, 5, 10 and 20mg tablets Available in 25, 50 and 100mg tablets.
Effectiveness Works for 81 percent of men. Works for 82 percent of men.
How fast does it work? Works as quickly as 15-20 minutes. Cialis Daily is also available, which works throughout the day. Works within thirty minutes of taking the pill.
How long does it last? Effects can last up to 36 hours. Remains active for four to six hours.
How to take May be taken with or without food. Be careful to avoid taking with greasy or fatty foods, or eating or drinking grapefruit, as this can affect how the drug works. Best if taken on an empty stomach as food can slow absorption and reduce effectiveness. Be careful to avoid eating or drinking grapefruit, as this can affect how the drug works.
Selling point Is available in lower doses and is long- lasting – which means you won’t need to time your sexual activity. Has been around much longer than other treatments, and has a proven track record for safety and success.  Generic Sildenafil provides a very cost-effective treatment option.
Side effects Facial flushing, headache, indigestion, and a stuffy or runny nose. Facial flushing, headache, indigestion, and a stuffy or runny nose. May also cause a green-blue visual tinge.

What is Cialis?

Cialis is the brand name of the drug Tadalafil. Cialis Daily is a low dosage tablet which is taken once a day and allows you to achieve an erection at any time of the day or night. Cialis 36-hour is taken 15-20 minutes before sex and works for as long as 36 hours.

What is Viagra?

Viagra is the best-known treatment for erectile dysfunction and has been licensed for use for over 15 years. Millions of men across the world have found it to be a very effective treatment. Since 2013, Viagra has been available as a generic medicine called Sildenafil. As a consequence, the price for Sildenafil has fallen substantially.

How do Cialis and Viagra work?

Cialis, like Viagra (Sildenafil), is what is known as a PDE-5 inhibitor. When sexually stimulated, the PDE-5 class of drugs maintain a relaxed muscle state and increase the flow of blood to the penis to facilitate an erection. PDE-5 inhibitors do not increase interest or sexual desire and are only used to treat the physical problems associated with erectile dysfunction.


Does Cialis work more quickly than Viagra?

Although both have a fast onset of action, Cialis works slightly faster than Viagra. While Viagra usually takes about 20-30 minutes, Cialis can work in 15-20 minutes. Cialis is also available as Cialis Daily, which is taken once a day, and will enable you to achieve an erection anytime throughout the day.

Winner: Cialis


Does Cialis last longer than Viagra?

Cialis has a longer duration of action than Viagra, and can remain in the body for up to 36 hours. This has earned it the reputation of “The Weekend Pill”. This benefits you because you don’t need to pre-plan your dosage close to any expected sexual activity, but instead can utilise its effects up to 12, and sometimes 36 hours after taking it.

Winner: Cialis


Is Viagra more effective than Cialis?

Both medications have a high success rate, helping the majority of men to regain control over their erection. In clinical trials for Viagra, Viagra 100mg was effective at treating 82 percent of patients; while in clinical trial data for Cialis, 81 percent of patients found that Cialis improved their erections. The clinical trial data indicates that both are effective and there is no significant difference between the two drugs.

Winner: Draw


Does Cialis have fewer side effects than Viagra?

As both drugs work in the same way, they share many of the same side effects. These include face flushing, headaches and indigestion.  However, Viagra also has a few other effects that don’t seem to affect users of Cialis to the same extent, such as rash, visual disturbance and diarrhea.  Headaches also occur more commonly with Viagra, but may last longer with Cialis.  If any of these affect you after taking a dose of Viagra, Cialis may be a better option.

Winner: Cialis


Conclusion: Which is Better – Cialis vs Viagra?

Cialis is a more modern, effective treatment for erectile dysfunction. Cialis appears to offer advantages over Viagra for most desirable attributes for an erectile dysfunction medication, including duration of action, onset of action, and side effects. However, Viagra is available at a substantially lower cost, as the generic medicine Sildenafil. Both treatments have their advantages, so weigh up the pros and cons carefully and make your choice.