Vidalista Black 80 belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors, which also includes medications like Viagra (Sildenafil) and Cialis (Tadalafil). It is typically prescribed to men who have been diagnosed with erectile dysfunction and is taken in tablet form. The medication works by blocking the PDE5 enzyme, which increases the amount of cyclic guanosine monophosphate (cGMP) in the body. This, in turn, relaxes the blood vessels in the penis, allowing for increased blood flow and improving erectile function.