Oral contraceptives, known as 'the pill,' are hormone-based methods used by women to prevent pregnancy, containing either combined hormones (estrogen and progesterone) or progesterone alone. Various types include combination pills, mini-pills, and emergency contraceptive pills, with additional hormonal methods for males emerging. While effective, oral contraceptives can have side effects, such as weight gain and mood changes, and may have drug interactions with various medications.