Cialis is a prescription medication used for the treatment of erectile dysfunction in men. Tadalafil is the main active ingredient of Cialis. Cialis loosens up the muscles of the vessels and increments blood flow to the blood vessels in the erectile tissue of your penis. This medicine starts working within 30 minutes to one hour depending on the Cialis dosages you are prescribed. Daily dose works around the clock. Take Cialis one hour before sex. It can take up to 1 hour to start fully working in your body. You can get Cialis online from the Pinkviva site. This is the only site where you can get all FDA-approved medicines at an affordable price.