Cialis (tadalafil) is a highly-efficient medicine that received the approval of the FDA and can be sued for the treatment of erectile dysfunction, as well as other health conditions as prescribed by your health care provider. If you are taking the regular Cialis you can use it when needed, about an hour before you are planning to have sex. Cialis makes it possible for you to have sex at any time within the next 36 hours, while other medications of the kind offer only 4-5 hours of efficiency. There is also Cialis for every day use that contains the same active ingredient and remains efficient during the entire day. You need to consult your health care provider to learn about both options to make sure you will benefit from the treatment. Some people may not be able to take Cialis because of their health condition (heart problems) and some drugs they have to take regularly.