Viagra® and generic Viagra® comprise sildenafil, which is similar medication found in another drug called Revatio®. Revatio® is made use of to deal with a unusual illness called pulmonary arterial hypertension (PAH).Góc s?c kho?Tra c?u thu?cTra c?u d??c ch?tTra c?u d??c li?uB?nh th??ng g?pB?nh vi?n??i ng? chuyên mônHo?t ??ng xã h?iTin t?c t