As you take 20 mg of Tadarise, you must follow your doctor's directions exactly. It is not advised for anyone under the age of 18 to use this product. This medication should not be used by anyone with low blood pressure, a history of heart or liver disease, or a recent stroke or heart attack. If you have any additional medical conditions, let your doctor know before using this medication. Prescription medication One medication for male impotence is tadarise 20mg. By increasing blood oxygen levels, it enhances blood flow to the penis. This may be used by men to aid in erection initiation and maintenance. Medications known as PDE 5-inhibitors stop phosphodiesterase type 5.