Vidalista 20 mg is primarily used to treat erectile dysfunction in men. You can take this medicine if you are suffering from a mild, moderate, or severe case of erectile dysfunction. This drug is Tadalafil which mainly works by dilating the blood vessels near the genital areas. It relaxes the penile muscles and increases blood flow to the penis, stimulating an erection. This medicine is only prescribed for men 18 years of age or older and should be taken only on the advice of their medical doctor.