What is the difference between Sildenafil and Tadalafil?

Sildenafil and Tadalafil are both highly effective prescription treatments for erectile dysfunction, but they work over different timeframes.

Sildenafil, which is the active ingredient in Viagra, typically lasts for about four hours and is best taken one hour before sexual activity.

Tadalafil, the active ingredient in Cialis, is often called the weekend pill because it can remain effective in your system for up to thirty six hours.

Your choice depends entirely on whether you prefer to plan ahead or want a treatment that allows for more spontaneity.