NCLEX Review Guide: Estrogens and Progestins

Mechanism of Action

• Estrogens bind to estrogen receptors in target tissues, promoting secondary sexual characteristics and maintaining reproductive function. They also affect bone density, cardiovascular health, and lipid metabolism.
• Progestins are synthetic forms of progesterone that prepare the endometrium for implantation and maintain pregnancy. They counteract estrogen's proliferative effects on the endometrium.

Primary Indications

• Hormone Replacement Therapy (HRT) for menopausal symptoms including hot flashes, vaginal dryness, and osteoporosis prevention
• Contraception through combined oral contraceptives or progestin-only methods
• Treatment of abnormal uterine bleeding and amenorrhea
• Management of endometriosis and dysmenorrhea

Absolute Contraindications

• Thromboembolic disorders including history of DVT, PE, or stroke
• Estrogen-dependent cancers such as breast cancer or endometrial cancer
• Undiagnosed abnormal vaginal bleeding
• Active liver disease or liver tumors

Common Adverse Effects

• Cardiovascular effects include increased risk of thromboembolism, hypertension, and stroke, especially with higher doses and in older patients
• Gastrointestinal effects such as nausea, vomiting, and gallbladder disease
• Breast tenderness, weight gain, and mood changes
• Breakthrough bleeding and changes in menstrual patterns

Priority Nursing Actions

1. Assess for contraindications before administration
2. Monitor vital signs, especially blood pressure
3. Educate about proper administration timing
4. Teach recognition of adverse effects
5. Schedule regular follow-up appointments

Knowledge Check

• ☐ I can identify absolute contraindications to estrogen therapy
• ☐ I understand the difference between estrogen and progestin effects
• ☐ I can recognize signs of thromboembolism
• ☐ I know when to use combined vs. estrogen-only therapy
• ☐ I can educate patients about proper medication administration