Tadalafil is a PDE5 inhibitor primarily used for erectile dysfunction (ED), benign prostatic hyperplasia (BPH), and pulmonary arterial hypertension. Standard doses are 2.5, 5, 10, and 20 mg. Higher strengths (40, 60, 80 mg) are generally not approved for typical ED treatment, as the maximum recommended daily dose is 20 mg, and higher doses carry increased risk of side effects.
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