Megalis 20 mg belongs to a class of medications known as phosphodiesterase type 5 (PDE5) inhibitors. It works by inhibiting the enzyme PDE5, which regulates blood flow to the penis. By inhibiting PDE5, Megalis 20 mg promotes the relaxation of smooth muscles in the penile blood vessels, allowing for increased blood flow and the attainment of a firm erection. Clinical studies have demonstrated the effectiveness of Megalis 20 mg in improving erectile function and overall sexual satisfaction in men with ED.

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