Hormone-modulating medications are drugs that are used to alter the levels of hormones in the body. Such medications are used to treat a variety of conditions, including infertility, menopause, and hormonal imbalances. These medications work by either increasing or decreasing the production of hormones in the body. They can also be used to block the effects of certain hormones, such as estrogen or testosterone. Hormone-modulating medications are often prescribed for conditions such as polycystic ovarian syndrome (PCOS), endometriosis, and precocious puberty. Hormone-modulating medications can be either synthetic or natural. Synthetic hormones are produced in laboratories, while natural hormones are derived from plants or animals. Synthetic hormones are typically more potent than natural hormones and can cause more intense side effects. Common synthetic hormones include estrogens, progestins, and androgens. Estrogens are responsible for female characteristics such as breast development, while progestins are responsible for maintaining pregnancy. Androgens are responsible for male characteristics such as facial hair growth and deepening of the voice. Common natural hormones include progesterone and testosterone. Progesterone helps regulate the menstrual cycle and maintains pregnancy, while testosterone is responsible for male characteristics such as facial hair growth and deepening of the voice. Hormone-modulating medications can have a variety of side effects, including nausea, headaches, weight gain, and mood swings. These side effects are typically mild and can be managed with lifestyle changes, such as increasing physical activity or eating a healthy diet. More serious side effects, such as liver damage or an increased risk of certain cancers, can occur with long-term use of these medications. It is important to discuss potential risks and benefits with a doctor before starting hormone-modulating medications.