A man who cannot strengthen his penis can be called a man suffering from impotence. The only cure for male impotence is to take tadalista medicine. The active ingredient in this drug tadalafil, increases blood flow to the blood vessels in the penis and helps in prolonged sex. So that you can enjoy sex for a longer period of time during sexual activity. The drug is taken 1 hour before sex, after which the effect lasts for 36 hours.