Biochemistry



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Desmopressin


-V2 selective

-DOC central diabetes insipidus




8-arginine vasopressin

-More specific for subtype of vasopressin receptor

-Hemophilia




Antithyroid drugs

-PTU

-Methimazole

-Block coupling reactions

-Block some peripheral conversion

-Slow onset

-Uncomplicated hyperthyroid condition

-PTU safer in pregnancy

-maculopapular rash is common

Antithyroid drugs

-Iodine

-Short term use, possible use in thyrotoxicosis. Decreases gland side, fragility, vascularity.

-No long term use







Adrenal steroid antagonists

-Spironolactone

-Blocks aldosterone and androgen receptors







Adrenal steroid antagonist

-Mifepristone

-Blocks glucocorticoid and progestin receptors

-RU-486







Estrogen drugs

-Conjugated equine estrogens

-Ethnyl estradiol

-Diethylstilbesterol

-Increase feedback inhibition of FSH and LH

-Contraception

-Hormone replacement

-Female hypogonadism

-Nausea, breast tenderness, gall bladder disease, endometrial hyperplasia

-Blood coagulation

-Increased risk of endometrial cancer unless progestins are added

-DES in pregnancy increases risk of vaginal adenocarcinoma

Danazol


-Inhibition of ovarian steroid synthesis

-Useful in endometriosis and fibrocystic breast disease




Clomipherene

-Decreases feedback inhibition

-Increases FSH/LH

-Increases ovulation

-Partial estrogen agonist via blockade of negative feedback to pituitary

-Increase fertility

-Adverse effects include multiple births

SERMs

-Tamoxifen

-E receptor agonist at bone

-E receptor antagonist at breast

-E receptor partial agonist at endometrium

-Useful for breast CA (estrogen sensitive)

-Risk of endometrial CA

SERMs

-Raloxifene

-E receptor agonist at bone

-Antagonist at breast and uterus

-Used for osteoporosis

-No increased CA risk

Progestin


-Major natural progestin

-Increase feedback inhibition of gonadotropins

-Depot contraception

-HRT


-Decrease HDL

-Increased LDL
-Glucose intolerance


-Breakthrough bleeding


OCPs

-Combination of estrogens and progestins in varied dose.

-contraception

-Nausea/bloating

-Headache

Androgen antagonists

-Leuprolide

-Finasteride

-Ketoconazole

***Recall that alpha antagonists are used for BPH***

-Leuprolide is a GnRH analogue that is used for prostate CA

-Finasteride is a 5a reductase inhibitor used for BPH and male pattern baldness

-Ketoconazole is a synthesis inhibitor used in androgen receptor positive cancer

-Finasteride stops conversion of testosterone to DHT

Insulin

-Lispro and regular insulin are usually used at meal time

-Lente and ultralente are more “basal” types of insulin

-Lente and ultralente usually given sometime during the day to mimic insulin secretion from the pancreas

-Ultralente is the longest acting insulin

-Antihypoglycemia

-Hypoglycemia

Sulfonyureas

FIRST GENERATION:
-Acetohexamide


-Chlorpropramide

SECOND GENERATION:

-Tolbutamide

-Glipizide

-Glyburide


-Glucose acts asan insulonogen by increasing intracellular Atp. Closure of K channels leads to Ca influx leading to insulin release

-Sulfonyureas block K channels causes membrane depolarization, influx of calcium.

-Sulfonyureas are insulin secreteagogues.

-Antihypoglycemic

-Hypoglycemia is biggest problem; more of an issue with first generation drugs

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