Endo/Repro - Pharmacology Flashcards
Leuprolide is a(n) _______ _______.
Leuprolide is a GnRH agonist.
What is leuprolide used to treat?
Endometriosis;
fibroids
Clomipheme is a(n) _______ _______.
Clomipheme is an estrogen receptor antagonist (at the level of the hypothalamus, thus inhibiting subsequent release of GnRH).
True/False.
Clomiphene and leoprolide have opposite effects on GnRH effects.
True.
Leoprolide is an agonist.
Clomiphene is an antagonist.
What medication inactivates progesterone receptors, thus being useful in termination of intrauterine pregnancies?
Mifepristone
What enzyme(s) does methimazole inhibit?
Thyroid peroxidase
What enzyme(s) does propylthiouracil inhibit?
Thyroid peroxidase;
5’-deiodinase
What is metformin’s mechanism of action?
Inhibiting mitochondrial mGDP and activating AMPK
What are the main side effects of metformin use?
Lactic acidosis;
GI effects
What is the major contraindication for metformin use?
Renal insufficiency
What is the main purpose of estrogen in OCPs?
What is the main purpose of progesterone in OCPs?
Inhibit ovulation;
stop the formation of endometrial carcinoma
Why are sulfonamides and ceftriaxone associated with kernicterus?
They displace bilirubin from albumin
Pregnancy causes a(n) ________ in blood volume and a(n) ________ in renal clearance.
Pregnancy causes an increase** in blood volume and a **decrease in renal clearance.
What antibiotic is known for its deleterious side effects involving teeth and bones?
Tetracyclines
What antibiotic is contraindicated in those under 18 because of its deleterious side effects involving tendon development?
Fluoroquinolones
Increasing age (and associated changes in renal and hepatic clearance) has what effect on drug half-lives and toxicity incidence?
Decreased renal and hepatic clearance lead to longer half-lives and increased toxicity incidence
What selective estrogen receptor modulator acts at the hypothalamus to inhibit GnRH release?
Clomiphene
What selective estrogen receptor modulator acts as an antagonist at the breast and an agonist at the uterus and bone?
Tamoxifen
What selective estrogen receptor modulator acts as an antagonist at the breast and uterus and an agonist at bone?
Raloxifene
What patients should never be given estrogens?
Pregnant women (remember DES and vaginal clear cell carcinoma in the fetus);
women with a history of thromboembolic events;
smokers
True/False.
Low-dose progestins can be used to inhibit ovulation with a near-100% efficiency.
False.
Low-dose progestins can be used to inhibit ovulation with a 60 - 80% efficiency (they also thicken the cervical mucus).
What is the main selective estrogen receptor modulator used in treating osteoporosis?
Raloxifene
What antiprogestin medication can be used in termination of an intrauterine pregnancy?
Mifepristone (RU 486)
Most birth control implants release what hormone(s)?
Progestins only
(medroxyprogesterone, etonogestrel, etc.)
What two progestins are found in high-dose birth control implants?
Medroxyprogesterone;
etonogestrel
Which progestin is often found in low-dose birth control implants (mini-pills)?
Norethindrone
Which has a longer duration of action and fewer side effects, methimazole or propylthiouracil?
Methimazole
How does potassium iodide exert an effect in cases of hyperthyroidism?
Inhibition of thyroid hormone release
In what situation is propylthiouracil absolutely indicated?
Thyroid storm
What medication can be used to alter circadian rhythyms in diabetics and ‘jump-start’ the BMR and insulin sensitivity?
Bromocriptine
Metformin acts primarily on which organ(s) of the body?
The liver
Women need _______ doses of Zolpidem (Ambien) than men.
Women need lower doses of Zolpidem (Ambien) than men.
Drugs that affect QT interval length tend to have greater effects in women. Why?
Premenopausal women have a longer average QT interval than men