Tadalafil is a highly effective, long-acting selective phosphodiesterase type 5 (PDE5) inhibitor widely prescribed for the management of erectile dysfunction (ED) and the signs and symptoms of benign prostatic hyperplasia (BPH). By blocking the degradation of cyclic guanosine monophosphate (cGMP) in smooth muscle cells, Tadalafil enhances the vasodilatory effects of nitric oxide, facilitating increased blood flow to the corpus cavernosum of the penis during sexual stimulation, as well as relaxing the smooth muscles of the bladder and prostate.