Your doctor will discuss the best treatment plan for you. The most common side effects are headaches, feeling sick, indigestion and facial flushes. Tadalafil can be synthesized starting from D – tryptophan methyl ester and piperonal via a Pictet—Spengler reaction. Cialis will be available as oral tablets in 5mg, 10mg and 20mg strengths. Those with a history of blood pressure or heart issues, hormonal imbalances, mental health issues, and diabetes should consult their doctor before trying PDE5 inhibitors.About this medication. TADALAFIL (tah DA la fil) treats pulmonary arterial hypertension (PAH), a condition that causes high blood pressure in the lungs. It works by relaxing your blood vessels and lowering the blood pressure in your lungs, which makes it easier for your heart to pump blood to the rest of your body. 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. AdGet a Prescription for ED treatment, discreetly deliverED to your ive Offers · How It Works · Get More Info4/5 ( reviews)Types: Finasteride · Tadalafil · Sildenafil.