TY - CHAP M1 - Book, Section TI - Menstrual-Related Disorders A1 - Vest, Kathleen A1 - Mayer, Danielle A2 - DiPiro, Joseph T. A2 - Yee, Gary C. A2 - Haines, Stuart T. A2 - Nolin, Thomas D. A2 - Ellingrod, Vicki L. A2 - Posey, L. Michael PY - 2023 T2 - DiPiro’s Pharmacotherapy: A Pathophysiologic Approach, 12th Edition AB - KEY CONCEPTS A urine pregnancy test should be one of the first steps in evaluating amenorrhea; however, the majority of primary amenorrhea cases can be attributed to either physical anomalies of the gonads, outflow tract, or anomalies of the hypothalamic–pituitary–ovarian (HPO) axis. For hypoestrogenic conditions associated with primary and secondary amenorrhea, estrogen (with a progestin) is recommended if correction of the underlying cause does not restore menses. Heavy menstrual bleeding (HMB) is generally caused by either uterine structural abnormalities or nonstructural causes. Pregnancy, including intrauterine pregnancy, ectopic pregnancy, and miscarriage, is at the top of the differential diagnosis for any person presenting with heavy menses. The levonorgestrel intrauterine system (IUS) is associated with a 61% lower discontinuation rate and 82% fewer treatment failures when compared to other conventional pharmacotherapies for HMB. Intrauterine devices (IUD) or IUS are considered therapeutic options in a variety of menstruation-related disorders. The American College of Obstetricians and Gynecologists (ACOG) guidelines indicate that both nulliparous and multiparous females at low risk of sexually transmitted diseases are good candidates for IUS use. Abnormal uterine bleeding associated with ovulatory dysfunction (AUB-O) is caused by oligo- or anovulation, leading to irregular, heavy menstrual bleeding due to chronic unopposed estrogen on the endometrium. Polycystic ovary syndrome (PCOS) can present as AUB-O, and symptoms include amenorrhea, oligomenorrhea, intermenstrual bleeding, and HMB. Its exact definition continues to evolve, but it is a disorder of androgen excess accompanied by ovulatory dysfunction and/or polycystic ovarian morphology. Insulin resistance is often present, and PCOS is a risk factor for the metabolic syndrome, type 2 diabetes, dyslipidemia, hypertension, and possibly cardiovascular disease. Combined hormonal contraceptives (CHCs) alone should be recommended for the management of irregular menstrual cycles and clinical hyperandrogenism in adults and adolescents with PCOS. The selective serotonin reuptake inhibitors (SSRIs) are first-line pharmacologic treatment options for premenstrual dysphoric disorder (PMDD). SN - PB - McGraw Hill CY - New York, NY Y2 - 2024/04/23 UR - accesspharmacy.mhmedical.com/content.aspx?aid=1201556881 ER -