Tadalafil belongs to the class of drugs known as phosphodiesterase 5 (PDE5) inhibitors. PDE5 medications stop specific phosphodiesterase type-5 enzymes from acting too quickly on the penis. It is difficult for a person suffering from erectile dysfunction to obtain and maintain an erection. While Tadalafil can treat ED, it has to be prescribed by a doctor and taken under a doctor’s supervision. See a doctor if you experience ED all the time or most of the time when you want to have sex.
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