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104 Cards in this Set

  • Front
  • Back
Specifically cytotoxic to the adrenal cortex.
Generally restricted to use in adrenal carcinoma
Selective for mets
Mitotane
This enzyme inhibitor shuts down 11-beta hydroxylase.
Has some function to diagnose primary and secondary adrenal dysfunction
Metyrapone-adrenal enzyme inhibitor
This enzyme inhibitor blocks cholesterol side chain cleavage--the rate limiting step in the synthesis of ALL steroid hormones
Not selective for adrenal gland
Has been used as an adjunct in the treatment of breast cancer
Aminoglutethimide
Nonspecific inhibition of all steroidogenic CYP450s--as well as hepatic 450s.
Ketoconazole
Inhibits 11-beta hydroxlase and aldosterone synthase at high doses
Spironolactone
This corticosteroid receptor antagonist may have utility in the management of neoplasms that are glucocorticoid receptor positive.
Good for glucocorticoid-excessive situations
Can block progestrone receptor at much lower concentrations
RU 486 (Mifepristone)
Aldosterone receptor antagonist that can also be used as a potassium sparring diuretic

At high doses, can block the androgen receptor
Spironolactone
Eplerenone
Testosterone propionate
Androgenic ester
Testosterone cypionate
Androgenic ester
testosterone enanthate
androgenic ester
fluoxymesterone
androgenic alkyl
methyltestosterone
androgenic alkyl
oxymetholon
anabolic steroid
oxandrolone
anabolic steroid
nadrolone
anabolic steroid
stanozolol
anabolic steroid
calusterone
anabolic steroid
Testosterone converted into..
17 Beta-estradiol
Androstenedione converted into...
estrone
Nine Therapeutic Applications of Androgens/anabolic steroids
1) hypogonadism
2) infertility
3) osteoporosis
4) mild anemia
5) breast carcinoma in women
6) anabolic disorders/debilitating disorders
7) promotion of athletic performance
8) treatment of short stature
9) heriditary angioedema
Adverse effects of special consideration in HRT in older men (6)
1) fluid retention
2) gynecomastia
3) sleep apnea
4) increased erythropoiesis
5) C/V disease
6) prostate
Aminoglutethimide actions
inhibits testosterone synthesis
nonselective
works thru cholesterol side chain cleavage
Cyanoketone
inhibitor of testosterone synthesis
Trilostane
inhibitor of testosterone synthesis
Ketoconazole
non-selective inhibitor of cytochrome P450
Finasteride actions and mechs
-inhibitor of activation
-androgen antagonist
-5-alpha reductase inhibitor
-offers the selectivity of treating DHT dependent abnormalities such as prostatic carcinoma, acne, hirsutism, baldness, without affecting testosterone driven functions (sex differntiation, sex drive, skeletal muscle growth)
Name the two Androgen Receptor Antagonist
1. flutamide
2. bicalutamide
Flutamide actions and mechs
-non steroidal
-devoid of any intrinsic androgenic activity
-limited usefulness in men due to compensatory increases in LH and testosterone
-useful in inhibiting adrenal androgens in men on GnRH therapy (prostate cancer), women, and castrate men.
-Blocks initial disease flare.
Bicalutamide
-non steroidal
-devoid of any intrinsic androgenic activity
-limited usefulness in men due to compensatory increases in LH and testosterone
-useful in inhibiting adrenal androgens in men on GnRH therapy (prostate cancer), women, and castrate men.
-Blocks initial disease flare.
Cyproterone acetate
-Androgen receptor antagonist
-actually a progestin that inhibits gonadotropin secretion
-a MALE CONTRACEPTIVE holy shit
-limited clinical use to sex offenders
-orphan drug status for hirsutism that is really, really nasty
Name the "mixed inhibitor" of androgen antagonism
spironolactone. It inhibits steroidogenic P450, and it is a weak androgen receptor antagonist
When do you give glucocorticoids?
1) hypercalcemia of sarcoidosis
2) To increase renal calcium excretion
3) To decrease the expression of renal vitamin D 1-alpha hydroxylase
When do you NOT give glucocorticoids?
1) primary hypercalcemia/hyperparathyroidism
Ergocalciferol
Pure vitamin D2.

give when PTH and 1-a-hydroxylase are intact
Cholecalciferol
Pure Vitamin D3
Calderol

Give when PTH and 1-a-hydroxylase are intact
Calcitrol
pure 1, 25 dihydroxyvitamin D3.

Use if patient has 1a-hydroxylase deficiency OR rapid fluctuations
Dihydrotachysterol
Reduced Vitamin D2.

Use if 1a-hydroxylase deficient

Only needs -OH added at C25 for activation
Doxercalciferol
1a-hydroxyvitamin D2.

Use if 1a-hydroxylase deficient

Only needs -OH added at C25 to be active
Name the analogs of Vit D that suppress PTH (2)
1) 22-oxacalcitriol
2) paricalcitol
22-oxacalcitriol
1, 25 dihydroxy-22-O-Vit D3.

Reduces PTH levels while having little activity in the GI tract and bone

No hypercalcemia, no hyperphosphatemia

For use in Primary Hyperparathyroidism ( cancer)
and Secondary Hyperparathyroidism associated with chronic renal failure
Paricalcitol
19-nor dihydroxyvitamin D2

Reduces PTH levels while having little activity in the GI tract and bone

No hypercalcemia, no hyperphosphatemia

For use in Primary Hyperparathyroidism ( cancer)
and Secondary Hyperparathyroidism associated with chronic renal failure
Cinacalcet
Calcium sensor mimetic
Cinacalcet uses
1) hypercalcemia of parathyroid cancer
2) hyperparathyroidism of renal failure

does not effect bone density
more effective in primary than secondary HPT.

start low and titrate upwards to lower risk of hypocalcemia
Bisphosphonates all end with...
-dronate
Bisphosphonates mech and actions
1)Potency AND selectivity for osteoclasts increase
2) bone toxicity decreases, for each consecutive generation
3) increases bone density correlated to decreased risk of atraumatic fractures only with 2nd and 3rd generations
4) decreases the recruitment of osteoclasts
Hypocalcemic agents and calcitonin are used in combination with what else?
1. dietary restriction of calcium
2. volume expansion
3. + or - diuretic
Most likely cause of hypophosphatemia?
Aluminum or carbonate containing antiacid
Hyperphospatemia treatment?
sevelamer--a phosphate binding polymer gel
Antiresorptive agents in Post-Menopausal Osteoporosis (7)
1. calcium
2. thiazide
3. estrogen
4. SERM (raloxifene)
5. Vit D
6. Calcitonin
7. Biphosphonate
Bone-Forming Agents (6)
1. fluoride
2. androgens
3. PTH cyclic administration
4. Statins
5. GH
6 IGF-1
Thyroid Peroxidase functions
1. activates Iodide
2. Catalyzes iodination of tyrosyl residues of thyroglobulin
3. Condensation of monoiodinated and diiodinated tyrosine to T3 and T4.
T4 is activated by what enzyme and where?
Type 1 iodothyronine 5' deiodinase ( 5'D-I) in liver
Sodium levothyroxine preparation
synthetic T4

Relative dosage: 4 (100 micrograms)
Sodium liothyronine
synthetic T3.
Faster onset
shorter duration of action
Relative dose: 1 (25 micrograms)
Used when faster onset is required, ie myxedema coma.
Thyroid drug with increased risk of cardiotoxicity?
Liothyronine
Liotrix
4:1 mix of T4:T3.
Antithyroid drugs (2)
Methimazole
PTU (prototype)
Can cause fatal aplastic anemia
Perchlorate
Lithium mechanism
inhibits thyroid secretion, but thyroid generally escapes.
Risk of interfering with calcium metabolism
Primary action of iodide
Inhibits T4 and T3 release.
simple dose causes an acute, transient inhibition of hormone secretion.
Indications for iodide
1. preop for thyroidectomy
2. In conjunction with PTU or methimazole
Untoward rxns of iodide
1. hypersensitivity
2. iodism
131 I (radioactive iodide)
emits beta and gamma rays. Provides definitive treatment. Beta particles are absorbed, leading to necrosis.
123 I (radioactive iodide)
used for thyroid scans
CI of radioactive iodide
1. pregnancy
2. less than 25 of 30 y/o due to risk of inducing cancer
3. coexisting, severe opthalmopathy
High doses of this drug can inhibit hepatic 5'-D I
Propranolol
Glucocorticoid effects on hyperthyroidism.
Decrease peripheral conversion of T4 to T3.
Increase conversion of T4 to rT3.
Inhibits TSH secretion
Inhibits iodide uptake and T4/T3 release.
Cholestyramine
Bile acid resin that will bind thyroid hormone conjugates secreted in bile and prevent their enterohepatic recycling
Uses of iodinated radiocontrast media
1. reduction of T4
2. Inhibits 5'-DI, thus limiting peripheral conversion of T4 to T3.
PTU mechanism of action
accumlates in the thyroid gland and IRREVERSIBLY inhibits the peroxidase enzyme.

Can cross the placenta

inhibits the peripheral conversion of T4 to T3.
Methimazole mechanism of action
accumlates in the thyroid gland and IRREVERSIBLY inhibits the peroxidase enzyme.

works faster than PTU

Can cross the placenta, this one more so than PTU
Side effects of PTU and Methimazole
1. Mild rash
2. Nausea, headache, pain/stiffness in joints
3. mild, transient leukopenia is common in children
4. agranulocytosis/leukopenia
Name the Rapid Acting Insulins (3)
1. Lispro
2. Aspart
3. Glulisine

LAG
Name the short-acting insulin
Regular Insulin (Zinc)
Name the intermediate acting Insulin
Isophane Insulin (NPH)
Name the 2 long acting insulins
1. insulin Glargine
2. Insulin Detemir
Other forms of insulin
Inhaled insulin
Rapid acting insulin characteristics
1. rapid onset, short duration
2. used to control prandial glucose
3. taken immediately before mealtime
4. Risk of hypoglycemia
5. Requires a prescription
Short acting insulin (regular zinc) characteristics.
1. complex, concentration dependent injection kinetics
2. taken 30-45 minutes before meal
Intermediate acting insulins (Isophane/NPH) characteristics
1. protamine causes delayed absorption
2. 6 insulin molecules, 1 protamine
Long acting insulins- Insulin glargine characterisitcs
1. Two Arg residues makes this insoluable at neutral pH.
Long acting insulins-Insulin detemir
1. myrisitic acid moiety increases self-aggregation and binding to albumin
Inhaled Insulin (exubera) characteristics
Not used for background coverage
can cause pulmonary fibrosis
Name the insulin secretagogues, First Generation, sulfonylureas
1. Tolbutamide
2. Cholorproamide
3. Tolazamide
Name the insulin secretagogues, Second Gen, Sulfonyureas
1. Glyburide
2. Glipizide
3. Glimperidide
Name the insulin secretagogues, Meglitinides
1. Repaglinide
2. nateglinide
Mechanism of sulfonyureas
Increase insulin release from the pancreas by binding to a high affinity receptor on B-cells that is associated wtih an ATP-sensitive K+ channel. Inhibits K+ efflux leading to depolarization. Ca++ influx occurs and insulin is released
Tolbutamide
1st gen sulfonyureas. Inhibits K+ efflux, leading to Ca++ influx and insulin release

-well absorbed, short mech of action, rapidly metabolized by liver

Treats DMII
Chlorpropamide
1st gen sulfonyureas. Inhibits K+ efflux, leading to Ca++ influx and insulin release

-long half-life, slow metabolism
Tolazamide
1st gen sulfonyureas. Inhibits K+ efflux, leading to Ca++ influx and insulin release
Glimepiride
2nd gen sulfonyureas. Much better at reducing glucose than first gen, but cause problems with hypoglycemia.
Not recommended in the elderly, those with hepatic or C/V disease

Most potent and longest duration of action
Glyburide
2nd gen sulfonyureas. Much better at reducing glucose than first gen, but cause problems with hypoglycemia.
Not recommended in the elderly, those with hepatic or C/V disease

Less potent with fewer side effects
Glipizide
2nd gen sulfonyureas. Much better at reducing glucose than first gen, but cause problems with hypoglycemia.
Not recommended in the elderly, those with hepatic or C/V disease

Short half life, more potent
Repaglinide
2nd gen sulfonyurea.

Fast onset of action
Nateglinide
2nd gen sulfonyurea
D-phenylalanine derivative

Amplifies insulin secretion in response to glucose but has little effect in the prescence of normal glycemic levels.

Lowest incidence of hypoglycemia.

Safe in individuals with renal dysfunction.
Metformin (biguanide)
Euglycemic agent
Works for Type 1 and Type 2 DM
No hypoglycemia
Insulin-sensitizer
No weight gain
May prevent onset of DMII
4 mechanisms of action of Metformin
1. Reduces hepatic gluconeogenesis
2. Slows glucose absorption from GI
3. Stimulates glycolysis in tissues
4. Reduces plasma glucagon levels
Adverse effects of metformin
1. GI
2. Inhibits Vit B12 absorption
Thiazolidinediones (2)
Pioglitazone
Rosiglitazone
Thiazolidinedione mech of action
1. Decrease insulin resistance by altering genes controlling glucose and lipid metabolism and adipocyte differentiation.
2. Ligands of PPAR gamma
Pioglitazone
PPAR alpha and PPAR-gamma.
Greater trigylceride lowering capacity than its counterpart
can alter other drugs metabolism
Rosiglitazone
Does not alter metabolism of other drugs.

Increased risk of C/V disease
Alpha-Glucosidase Inhibitors (2)
Acarbose

Miglitol
Alph-Glucosidas Inhbitors mechanisms
Disrupt transport of monosaccharides out of the intestine by competitively inhibiting the breakdown of starches, oligosaccharides, and disaccharides in the intestine.