You could get dizzy, faint or have a heart attack or stroke. Cialis has a longer duration of action, up to 36 hours, compared to other ED medications. Tadalafil stops the breakdown of a chemical responsible for relaxing muscles. Persons surnamed “Cialis” objected to Eli Lilly and Company’s so naming the drug, but the company has maintained that the drug’s trade name is unrelated to the surname. You can report an adverse event either online, by regular mail or by fax, using the contact information at the bottom of this page. Your doctor will discuss the best treatment plan for you. If Cialis is too weak for you, then with Cialis Professional you will be completely satisfied.headache. indigestion. back pain. muscle pain. flushing. stuffy nose. Patients who get back pain and muscle aches usually get them 12 to 24 hours after taking Cialis and these usually go away by. Tadalafil is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). It is sometimes known by its generic name tadalafil, and sometimes known by its trade name, Cialis. There are also other brands of this medicine available.  · You can lower the cost of Cialis to $ for 30, 20mg Tablet of generic Cialis. You’ll find free Cialis coupons below from SingleCare to save even more money on your next prescription or refill. Brand vs. Generic. Generic. Form. Dosage. Quantity. count. Price alert. Unlock members-only prices. Free sign-up. $ This price includes.