Do you have problems in your life because of sex? Sildenafil is a drug used to treat ED. Generally, a person needs such medicine within 1 hour or 30 minutes during sexual intercourse. It works to achieve an erection with your partner. It works in the treatment of erectile dysfunction. Avoid taking it by running away or crushing it. You take the medicine with food. Cenforce 25 is a drug that comes in high doses.