Tadalafil is commonly used to treat erectile dysfunction (difficulty getting or keeping an erection), benign prostatic hyperplasia (enlarged prostate with symptoms such as difficulty urinating), and pulmonary arterial hypertension (high blood pressure in the blood vessels supplying the lungs)[1][2][3].
For erectile dysfunction, tadalafil works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection[3][7].
In the treatment of benign prostatic hyperplasia, tadalafil helps relax the muscles in the prostate and bladder, making urination easier and reducing related urinary symptoms[3][5][7].
When used for pulmonary arterial hypertension, tadalafil relaxes the blood vessels in the lungs, lowering blood pressure in these vessels and improving the ability to exercise[1][4][6].