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Vidalista 20mg is a drug used to treat erectile dysfunction in men. It is a PDE5 inhibitor, which means it inhibits the enzyme that breaks down cGMP, the substance that relaxes smooth muscles and allows blood to flow into the penis. This results in increased blood flow to the penis, which leads to an erection. Vidalista 20mg is available in tablet form and should be taken orally with water. It should be taken 30-60 minutes before sexual activity, and the effects last for 4-6 hours.