Repro Drugs Flashcards
Leuprolide
-GnRH analog with agonist properties when used in pulsatile fashion / antagonist when used continuously
Use: uterine fibroids, endometriosis, precocious puberty, prostate cx,infertility, breast cancer/androgen excess
Adverse: hypogonadism, decreased libido, ED, nausea vomiting, edema, depression, decreased bone density when >6 months
Ethinyl estradiol, DES, mestranol
-bind estrogen receptors
-hypogonadism or ovarian failure, menstrual abnormalities, hormone replacement therapy
Adverse: increase risk of endometrial cx, bleeding in postmenopausal, clear cell adenocarcinoma in vagina, increased clot risk, lipid effects (increase TG, cholesterol)
Clomiphene
Selective estrogen receptor modulator
- antagonist at estrogen receptor in hypothalamus
- prevents LH and FSH from pituitary, stimulates ovulation
- used to treat infertility due to anovulation
- may cause hot flashes, ovarian enlargement, visual disturbances, pituitary tumor
Tamoxifen
Selective estrogen receptor modulator
- antagonist at breast, agonist at bone
- increase risk of thromboembolic events and endometrial cancer
- used to treat and prevent recurrence of ER/PR positive breast cancer
Raloxifene
Selective estrogen receptor modulators
- antagonist at breast, uterus, agonist at bone
- increased risk of thromboembolic event but NOT cancer
- used to treat osteoporosis
Anastrozole, letrozole, exemestane
Aromatase inhibitors
- inhibit peripheral conversion of androgens to estrogen
- use: ER positive breast cancer in postmenopausal women
Hormone replacement therapy
- use: relief of menopausal symptoms, osteoporosis
- unopposed estrogen therapy increases risk for endometrial cancer, progesterone/progestin is added.
- possible increased CV risk
Levonorgestrel, medroxyprogesterone, etonogestrel, norethindrone, megestrol
Progestins
- bind progesterone receptors, decrease growth and increase vascularization of endometrium, thicken cervical mucus
- use: contraception, endometrial cancer, abnormal uterine bleeding,
Mifepristone, ulipristal
Anti progestins
- competitive inhibitors of progestins at progesterone receptors
- use: termination of pregnancy (mifepristone with misoprostal), emergency contraceptive (ulipristal)
Combined contraceptives
- progestin and ethinyl estradiol
- estrogen and progestin inhibit FSH/LH and prevent estrogen surge, no ovulation
- progestin=thickening of cervical mucus, limit access of sperm to uterus and endometrial proliferation is inhibited, thinner and less viable
- contraindications: smokers, pts with CV disease, migraines, breast cancer and liver disease
Copper IUD
- produces local inflammation rxn toxic to sperm and ova, preventing fertilization and implantation, no hormones
- use: long acting reversible contraception, most effective emergency contraception
- adverse: heavier, longer menses, dysmenorrhea, risk of PID with insertion
Tocolytics
Meds that relax the uterus
Terbutaline
-B2 agonist
Used to slow contraction frequency in labor and prolong time to delivery
Adverse: dizziness, drowsiness, breathing probs, irregular heartbeat, maternal hyperglycemia, pulmonary edema, hypotension, tachycardia
-Not for use for longer than 48-72 hours
Nifedipine
-Ca2+ channel blocker
-used to decrease contraction in preterm labor, peripheral vasodilator
Contraindicated: women with hypotension, caution with CHF, left sided failure
Indomethacin
NSAID
-used to slow contractions in preterm labor