Hormone therapy involves taking medication that prevents cancer cells from getting the hormones they need in order to grow, which may be given orally (in pills that you swallow) or injected into a muscle in your hip, thigh, arm, leg, or belly. Some frequently used hormone therapy drugs are abiraterone, anastrozole, exemestane, fulvestrant, letrozole, leuprolide, and tamoxifen. In some cases, your doctor may also remove the gland responsible for hormone production with surgery.