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. Furthermore, the longer half-life is the basis for tadalafil’s daily therapeutic use in treating pulmonary arterial hypertension. Your doctor will discuss the best treatment plan for you. You can buy it from a store-based pharmacy or reputable online pharmacy with a prescription. How can I buy tadalafil?Brand-name Cialis: Generic Cialis (tadalafil) Daily generic Cialis (tadalafil) Hims: $ per month (5mg) starting at $40 per month (5mg, 10mg, 20mg) starting at . heart attack symptoms – chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating. Common tadalafil side effects may include: headache; flushing (warmth, redness, or tingly feeling); nausea, upset stomach; stuffy nose; or. muscle pain, back pain, pain in your arms, legs, or back. This is not a complete list of side. Viagra (sildenafil) tends to get all the attention. After all, it was the first FDA-approved oral erectile dysfunction (ED) medication, and it became a household name soon after. But its close cousin, Cialis (tadalafil), is also an effective option for many men who experience ED. Cialis is a longer-acting option that some men prefer over other ED .