Payment options: Consider how you’d like to pay. Here’s how much the increase will be. The side effects of each medication also differ. Usually, Cialis will start to work within 30 to 60 minutes, so take it at least a half hour before you plan to have sex. From there, you have the ability to follow up with your physician at any time should the need arise. While Viagra works for three to five hours, a typical dose of Cialis keeps working for 24 to 36 hours in your body. · Generic Cialis is called Tadalafil and you could save up to 90% on the price of your medication by buying brand or generic Cialis online through Canadian Pharmacy Meds. Buying Tadalafil may offer even better savings and comes in the same strengths of 20mg, 10mg, 5mg or mg. You do not need a Cialis coupon to pay our great price. Yes. Cialis is approved by the FDA to treat erectile dysfunction (ED). Our medical team can prescribe Cialis 5mg, 10mg, and 20mg. The starting dose we generally recommend is 10mg. Tadalafil is the name for the active chemical ingredient in Cialis. PDE-5 inhibitors is the name of the group of medicines. Cialis is the brand name. Generic Cialis, or Tadalafil, is available in several doses in tablet form: milligrams (mg), 5 mg, 10 mg, and 20 mg. Depending on the dose for ED, you can use it as needed before sexual.