By blocking the activity of particular enzymes, Tazzle lowers blood flow to the penis (PDE5). Consequently, it relaxes the blood arteries supplying the penis and improves blood flow and oxygen delivery. Tazzle relaxes the blood vessels that supply the lungs, enabling blood to flow more freely and with less pressure from them, so reducing the symptoms of pulmonary arterial hypertension.

The prescription medication Tazzle contains the PDE5 inhibitor tadalafil, which is used to treat:

An erection can be achieved and maintained by men with erectile dysfunction (ED). Benign prostatic hyperplasia (BPH) reduces urinary symptoms caused by an enlarged prostate.