Spermicide is a type of contraceptive that contains chemicals designed to kill sperm and prevent them from fertilizing an egg. It is available in various forms, including gels, foams, films, and suppositories. Spermicide is often used alone or in combination with other contraceptive methods, such as condoms or diaphragms, to enhance effectiveness. When using spermicide, it is important to apply it correctly and allow it time to take effect before engaging in sexual intercourse. While spermicide can help reduce the risk of pregnancy, it does not protect against sexually transmitted infections (STIs), so additional protection may be necessary.