Tadalis SX 20 mg belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. It works by inhibiting the enzyme PDE5, which helps relax blood vessels in the penis. This action allows for increased blood flow to the penis, leading to improved erectile function. Before using Tadalis SX 20 mg or any medication for ED, it's important to consult with a healthcare provider. They can evaluate your medical history, current medications, and overall health to determine if Tadalis SX is suitable for you and what dosage is appropriate.