Not getting a strong erection during sex. This means you suffer from erectile dysfunction. If you too are suffering from this problem, you should try tadacip 20 medicine. This pill facilitates the blood flow in the blood vessels in the male penis. This pill should be taken 40 minutes before sex. It should not be used by women and children. This pill is only for men 18 and older. If you are going to take this pill, you should avoid taking alcohol and high-fat food.