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Treatment strategy for DM-1
- low-sugar diet
- insulin replacement
- DM-1
- early onset
- loss of beta cells-->absolute dependence on insulin
- ketoacidosis prone!
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Treatment strategy for DM-2
- diet modify
- exercise (lose weight)
- oral hypoglycemics
- insulin replacement
- DM-2
- adult onset
- decrease response to insulin--> diet-->oral hypoglycemics +/- insulin
- NOT ketoacidosis prone! more Hyperosmolar coma from hyperglycemia
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Insulin release increased by:
- Glucose
- Sulfonylureas
- M-agonists
- B2-agonists
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Insulin release decreased by:
Alpha-2 agonists
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Mechanism of Insulin binding
- Bind insulin receptor (RTK)--> autophosphorylate tyr-kinase--> bind/ phosphorylate IRS-1--> bind/phosphorylate SH2-domain proteins-->-->
- activate phosphatases, induce gene expression of LPL, FA-sythase, Glucokinase...
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Lispro (Novolog)
- rapid acting insulin (IV!)
- -bind insulin receptor
- -Liver: increase glucose stored as glycogen
- -Muscle: increase glycogen synthesis, K+ uptake
- -Fat: increase TG storage
- USE- DM-1, DM-2
- life-threatening hyperkalemia
- stress induced hyperglycemia
SE- hypoglycemia
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Regular
- rapid acting insulin (IV)
- -bind insulin receptor
- -Liver: increase glucose stored as glycogen
- -Muscle: increase glycogen synthesis, K+ uptake
- -Fat: increase TG storage
- USE- DM-1, DM-2
- life-threatening hyperkalemia
- stress induced hyperglycemia
SE- hypoglycemia
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Aspart (Apidra, Humalog)
- rapid acting insulin
- -bind insulin receptor
- -Liver: increase glucose stored as glycogen
- -Muscle: increase glycogen synthesis, K+ uptake
- -Fat: increase TG storage
- USE- DM-1, DM-2
- life-threatening hyperkalemia
- stress induced hyperglycemia
SE- hypoglycemia
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NPH
- intermediate acting insulin
- -bind insulin receptor
- -Liver: increase glucose stored as glycogen
- -Muscle: increase glycogen synthesis, K+ uptake
- -Fat: increase TG storage
- USE- DM-1, DM-2
- life-threatening hyperkalemia
- stress induced hyperglycemia
SE- hypoglycemia
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Glargine
- long acting insulin analog
- -NO peak!
- -supply constant background level insulin
- -NO risk of hypoglycemia
USE- DM-1, DM-2(?)
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Detemir (Levemir)
- long acting insulin analog
- -NO peak!
- -supply constant background level insulin
- -NO risk of hypoglycemia
USE- DM-1, DM-2(?)
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Diabetic ketoacidosis
- Ketones: (made from high ATP from burning fat)
- beta-hydroxybutyric acid--> NADH + 2 acetyl-CoA
- acetoacetate--> 2 acetyl-CoA
- acetone--> breath out (fruity breath)
- Symptoms:
- -polyuria, polydipsia
- -nausea, fatigue
- -Kussmaul breathing (wanna rid of acidosis!)
- -dehydration
- -elevated serum K+, low intracellular K+ (b/c acidosis, and low insulin)
- Rx- IV regular Insulin!
- -give w/ glucose to prevent hypoglycemia
- -give w/ K+ to prevent hypokalemia!!
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Hypoglycemic symptoms
- lip/tongue tingling
- lethargy
- confusion
- sweat
- tremor
- tachycardia
- coma
- seizures
- RX- oral glucose, IV-dextrose (if unconscious)
- glucagon (IM or inhalation)
- - IM glucagon in non-medical setting, or IV dextrose in medical setting. but NOT IM-glucose!
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Mechanism of insulin release from pancreas
eat-->glucose--> go thru GLUT-2 (low affinity) in pancreas beta cell--> increase ATP--> close ATP-dependent K-channel--> depolarize--> open vol-Ca channel--> Ca in--> exocytosis of insulin
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Acetohexamide
- first gen Sulfonylurease (secretologue)
- -close ATP-dep K channel in beta cells--> depol--> Ca influx--> insulin release
- -decrease glucagon release
- -increase insulin receptor sensitivity (?)
- (useless in DM-1)
USE- DM-2
- SE- long acting!! watch out in renal disease pt
- -weight gain, hypoglycemia
- -drug interactions w/ Cimetidine (induce cyps), Salicylates, Sulfonamides
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Tolbutamide
- first gen Sulfonylurease (secretologue)
- -close ATP-dep K channel in beta cells--> depol--> Ca influx--> insulin release
- -decrease glucagon release
- -increase insulin receptor sensitivity (?)
- (useless in DM-1)
USE- DM-2
- SE -NO worries for kidney!
- -weight gain, hypoglycemia
- -drug interactions w/ Cimetidine (induce cyps), Salicylates, Sulfonamides
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Chlorpropamide
- first gen Sulfonylurease (secretologue)
- -close ATP-dep K channel in beta cells--> depol--> Ca influx--> insulin release
- -decrease glucagon release
- -increase insulin receptor sensitivity (?)
- (useless in DM-1)
USE- DM-2
- SE- long acting!! watch out in renal disease pt
- -disulfram-like effects! SIADH!
- -weight gain, hypoglycemia
- -drug interactions w/ Cimetidine (induce cyps), Salicylates, Sulfonamides
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Glipizide
- second gen Sulfonylureas
- -close ATP-dep K channel in beta cells--> depol--> Ca influx--> insulin release
- -decrease glucagon release
- -increase insulin receptor sensitivity (?)
- (useless in DM-1)
USE- DM-2
- SE- watch out in liver disease pt
- -weight gain, hypoglycemia
- -drug interactions w/ Cimetidine (induce cyps), Salicylates, Sulfonamides
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Glyburide
- second gen Sulfonylureas (secretologue)
- -close ATP-dep K channel in beta cells--> depol--> Ca influx--> insulin release
- -decrease glucagon release
- -increase insulin receptor sensitivity (?)
- (useless in DM-1)
USE- DM-2
- SE- active metabolite! watch out in kidney disease
- -weight gain, hypoglycemia
- -drug interactions w/ Cimetidine (induce cyps), Salicylates, Sulfonamides
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Glimepiride
- second gen Sulfonylureas (secretologue)
- -close ATP-dep K channel in beta cells--> depol--> Ca influx--> insulin release
- -decrease glucagon release
- -increase insulin receptor sensitivity (?)
- (useless in DM-1)
USE- DM-2
- SE-weight gain, hypoglycemia
- -drug interactions w/ Cimetidine (induce cyps), Salicylates, Sulfonamides
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Metformin
- Euglycemic (Biguanides)
- -decrease postprandial glucose (decr liver glucose!)
- -does NOT cause hypoglycemia or weight gain!inhibit intracellular enzymes
- -decrease gluconeogenesis
- -increase glycolysis
- -increase glucose uptake by GLUT-4 in SKM (insulin sensitivity) (maybe activate PPAR transcription factors)
- USE- (oral) monotherapy or combo DM-1, DM-2 can be used in pts w/out islet fxn.
- -synergistic w/ sulfonylureas!
- SE- Lactic acidosis!! , GI distress
- DO NOT use in renal failure!!
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Acarbose
- alpha-glucosidase inhibitor
- -block intestinal brush-border alpha-glucosidase
- -decrease glucose absorption-->decrs postprandial glucose-->insulin demand
- -NO hypoglycemia!
USE- monotherapy or combo for DM-2
SE- GI! diarrhea (osmotic), hepatotoxity
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Miglitol
- alpha-glucosidase inhibitor
- -block intestinal brush-border alpha-glucosidase-decrease glucose absorption-->decrs postprandial glucose-->insulin demand
- -NO hypoglycemia!
USE- monotherapy or combo for DM-2
SE- GI! diarrhea (osmotic), hepatotoxity
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Pioglitazone
- Glitazone/ Thiazolidinedione
- -insulin sensitizer (like metformin)
- -bind PPAR-gamma transcription factor (nuclear receptor) for insulin-response genes (bypass insulin-receptor/signaling)--> sensitize to insulin
- -decrease liver gluconeogenesis
- -increase insulin receptor #s!
- -increase HDL
USE- monotherapy for DM-2 or combo
- SE- less hypoglycemia than sulfonylurease
- -weight gain, edema
- -CV toxicity, hepatotoxicity
- -bone fractures..
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Rosiglitazone (Avandia)
- Glitazone/ Thiazolidinedione
- -insulin sensitizer (like metformin)
- -bind PPAR-gamma transcription factor for insulin-response genes (bypass insulin-receptor/signaling)--> sensitize to insulin
- -decrease liver gluconeogenesis
- -increase insulin receptor #s!
- -increase HDL
USE- monotherapy for DM-2 or combo
- SE -less hypoglycemia than sulfonylurease
- -weight gain, edema
- -CV toxicity, hepatotoxicity
- -bone fractures..
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Important genes that are altered by PPAR-Y?
- ultimately decreases resistance to insulin!
- -increase Adiponectin (cytokine sec by fat cells)
- -increase FA transport protein
- -increase Insulin receptor substrate
- -increase GLUT-4
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GLP-1 normal action?
- released by L-cells in GI in response to food
- -GPCR--> Gs--> cAMP!
- induce satiety
- decrease gastric emptying
- increase insulin release
- -very short half life, so GLP-1 meds are analogs
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Exenatide
- GLP-1 (incretin) receptor agonist
- -normally: eat--> SI-->GLP-1-->pancreas--> increase insulin release, decrease glucagon--> decrease glucose
- -enhance glucose-dependent insulin secretion
- USE- (injected) DM-2
- -decrease appetite!! great for losing weight too.
SE- nausea, vomiting, hypoglycemia w/sulfonylureas, pancreatitis!
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Sitagliptin (Jenuvia)
- GLP-1 enhancer
- -block DPP-4 (dipeptidyl peptidase)--> inhibit breakdown of endogenous GLP-1
USE- DM-2
SE- not much..
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Pramlintide
- synthetic amylin
- -slow GI absorption
- -decrease glucagon
- -decrease appetite
- USE- DM-2
- -decrease appetite!
SE- hypoglycemia, nausea, diarrhea
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treatment for gestational diabetes?
- Insulin!
- oral hypoglycemic meds are generally avoided in GDM b/c risk of fetal hyperinsulinemia and hypoglycemia.
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Hypoglycemia can occur w/ use of Insulin and Sulfonylurease, unlike Metformin and TZDS..
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Modes of action of DM drugs
Inhibit glucose absorption: Acarbose, Miglitol
Inhibit glucose production: Metformin, Pioglitazone, Rosiglitazone
Enhance glucose uptake: Metformine, Pioglitazone, Rosiglitazone
Increase insulin release: Sulfonylureas, Exenatide, Sitaglipin
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Adrenal insufficiency? Adrenal crisis?
-signs? what do you immediately give?
vomiting, abdominal pain, weight loss, anorexia, hypotension, hypoglycemia, hyperpigmentation
Rx-Corticosteroids (stress dose of hydrocortisone)!!
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Propylthiouracil
- thioamide
- -block thyroid peroxidase
- -high dose block 5'deiodinase
- -block organification of iodied and coupling of thyroid hormone synthesis
- -cross placenta, but highly protein bound, so safer
USE- hyperthyroidism
SE- maculopapular rash, aplastic anemia, agranulocytosis (rare)
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Methimazole
- thioamide
- -block thyroid peroxidase
- -block organification of iodied and coupling of thyroid hormone synthesis
- -cross placenta, high free form, so do NOT use in pregnancy. Use Proplthiouracil
USE- hyperthyroidism
SE- maculopapular rash, teratogen, aplastic anemia, agranulocytosis (rare)
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Propranolol
- nonselective beta blocker
- -also blocks 5'deiodinase (block T3-->T3)
USE- hyperthyroidism
SE- sedation, bradycardia, AV block, hypotension, bronchospasm, vasospasm.. (look at b-blockers)
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Perchlorate/ pertechnetate
- block Na/Iodide symporter on thryoid follicular cell (basolateral side)
- -competative inhibition
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Iodide (Lugol's solution)
- KI + I2 (Lugol's solution)
- -inhibit release of T3 and T4 from Thyroglobulin
- -decrease thyroid gland size, vascularity
USE- preOP use in thyrotoxicosis
SE- no long term use b/c thyroid gland "escapes" from effect afte 2wks..
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Drugs that decrease peripheral conversion of T4-->T3?
- Propylthiouracil
- Glucocorticoids
- Amiodarone (hypothyroidism in iodine sufficient regions, thyrotoxicosis in iodine defficient regions)
- Iopanoic acid
- Propranolol (non selective beta-blockers)
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What do you give to Grave's disease patient with severe Opthalmopathy?
- Glucocorticoids!
- -decrease severity of inflammation and decrease extraocular volume.
- -conventional antithyroid drugs do NOT improve opthalmopahty (edema+ lympthocyte, mac infiltration+ fibroblasts make too much PGs)
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Levothyroxine
- Thyroxine analog
- replace thyroxine
USE- hypothyroidism, myxedema
SE- tachycardia, heat intolerance, tremor, arrhythmia
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Triiodothyronine
- Thyroxine analog
- replace thyroxine
USE- hypothyroidism, myxedema
SE- tachycardia, heat intolerance, tremor, arrhythmia
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Growth hormone
Hypothalamic/pituitary drug
USE-GH deficiency, Turner syndrome
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Somatostatin (Octreotide)
Hypothalamic/ Pituitary drug
USE-Acromegaly, Carcinoid syndrome, Gastrinoma, Glucagonoma
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Oxytocin
Hypothalamic/Pituitary drug
USE- Stimulate labor, uterine contractions, Milk let-down, Uterine hemorrhage.
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Desmopressin (ADH)
ADH analog
- USE- central diabetes incipidus
- -Hemophlia A, vWF disease
(stimulate endothelial release of vWF + VIII)- -Enuresis!
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not much effect on V1 receptors so no vasoconstiriction-
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Demeclocycline
- ADH antagonist
- -member of tetracycline
USE- SIADH (syndrome of inappropriate ADH)
SE- Nephrogenic diabetes insipidus, Photosensitivity, bone + teeth abnormalities
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Hydrocortisone
Predisone
Triamcinolone
Dexamethasone
Beclomethasone
- Glucocorticoids!
- -inhibit PLA2, block expression of COX-2
- -decrease production of leukotriens and Prostaglandins
USE- Addison's disease, inflammation, immune suppression, asthma
SE- Iatrogenic Cushing's syndrome- buffalo hump, moon facies, truncal obesity, muscle wasting, think skin, easy bruisability, osteoporosis adrenocortical atrophy, peptic ulcers, diabetes ( if chronic) - -Adrenal insufficiency if drug is stopped after chronic use!
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Leuprolide
- GnRH analog
- -agonist properties when used in pusatile fashion
- -antagonist properties when used continuously.
- USE- infertility (pusatile)
- - Prostate cancer (continuous, use w/ Flutamide)
- -Uterine fibroids, Endometriosis, DUB (continuous)
SE- Antiandrogen, nausea, vomiting
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Testosterone (methyltestosterone)
Androgen receptor agonist
- USE- Hypogonadism, pormote development of secondary sex characteristics
- -stimulate anabolism for recovering burns, injury
- -treat ER-positive breast cancer (exemestane)
- SE- masculinization in females, reduce intratesticular testosterone in males (inhibit LH release)--> gonadal atophy
- -Premature closure of epiphyseal plates
- -increase LDL, decrease HDL
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Testosterone---5-alpha reductase--> DHT (more potent)
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Finasteride
- 5apha-reductase inhibitor
- -block Testosterone--> DHT
USE- BPH, hair growth
to prevent male patterin hair loss, give a drug that'll promote female breast growth
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Flutamide
- testosterone, DTH receptor blocker
- nonsteroidal, competitive inhibitor of androgens
USE- Prostate carcinoma
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Ketoconazole
- Inhibit steroid synthesis
- -block Desmolase
USE- PCOS (polycystic ovarian syndrome) to prevent Hirsutism
SE- gynecomastia, amenorrhea
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Spironolactone
- K-sparing diuretic
- -block Aldosterone receptor
- -also block other androgen receptors
USE- PCOS to prevent hirsutism
SE- gynecomastia, amenorrhea
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Estrogens
-Ethinyl estradiol
-DES
-Mestranol
Estrogen receptor agonists
- USE-hypogonadism, ovarian failure, mesntrual abnormalities, HRT in postmenopausal women
- -Men: androgen dependent prostate cancer
- SE-increase risk for endometrial cancer, bleeding in postmenopausal women
- -DES exposure in utero--> clear cell carcinoma of vagina
- -hypercoagulability
- DO NOT use in ER-positive breast cancer, History of DVT!
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Clomiphene
- SERMs (selective estrogen receptor modulators)
- Estrogen partial agonists in hypothalamus
- -prevent normal feedback inhibition
- -increase release of LH and FSH--> ovulation
USE- infertility, PCOS
SE- hot flashses, ovarian enlargement, multiple simultaneous pregnancies, visual disturbances
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Tamoxifen
- Estrogen partial agonists
- SERM
- -antagonist on breast tissue -partial agonist in bone, endometrium
- USE-
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Raloxifene
- Estrogen partial agonist
- SERM
- -agonist on bone
- -reduce bone resorption
USE- Osteoporosis
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HRT- Hormone replacement therapy
- USE-relief or prevention of menopausal symptoms
- (hot flashes, vaginal atrophy)
- -Osteoporosis (increase Estrogen, decrease osteoclast)
- SE- unopposed estrogen replacement therapy increase risk of endometrial cancer (so add progesterone)
- -possible increase of CV risk
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Anastrozole/ Exemestane
aromatase inhibitors
USE- postmenopausal women w/breast cancer
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Progestins
- -progesterone receptor agonist
- -increase vascularization of endometrium
- USE- oral contraceptive addjunct
- - endometrial cancer
- -abnormal uterine bleeding
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Mifepristone
(RU-486)
- -competitive inhibitor of Progestins
- -block progesterone receptor
- USE- Termination of pregnancy
- -given w/ Misoprostol (PGE1-analog: PG cause uterine contraction + cervical dilation)
SE- heavy bleeding, GI effects ( nausea, vomiting, anorexia), abdominal pain (b.c anti-pregestin effects stimulate release of endogenous prostaglandins and sensitize myometrium to effects of hormone)
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Oral contraceptives
- Synthetic progestin+ estrogen
- -prevent estrogen surge, LH surge does NOT occur--> NO ovulation
Advantages- reliable, decrease rick of endometrial, ovarian cancer, decrease incidence of ectopic pregnancy, decrease pelvic infections, regulation of meses
Disadvantages- taken daily, NO protection against STDs, Increase TGs, Depression, weigh gain, nausea, HTN, hypercoagualability
Do NOT use in smokers>35 y.o (increase CV events), hx of DVT, stroke or hx of estrogent-dependent tumor!!
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Dinoprostone
- PGE2 analog
- -cause cervical dilaiton, uterine contraction
USE- induce labor
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Ritodrine/ Terbutaline
- beta-2 agonist
- -relax urterus
USE- reduce premature uterine contractions
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Tamsulosin
- alpha-1 blocker
- -inhibit smooth muscle contraction
- -selective for alpha-1 A,D receptors in prostate!
- (vascular- alpha-1 B)
USE- BPH
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Sildenafil
- block cGMP PDE--> increase cGMP
- -relax smooth muscle of corpus cavernosum
- -increase blood flow, penile erection
USE- erectile dysfunction
SE- headache, flushing, dyspepsia, impaire blue-green color vision, risk of life-threatening hypotension if on nitrates!!
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Vardenafil
- block cGMP PDE--> increase cGMP
- -relax smooth muscle of corpus cavernosum
- -increase blood flow, penile erection
USE- erectile dysfunction
SE- headache, flushing, dyspepsia, impaire blue-green color vision, risk of life-threatening hypotension if on nitrates!!
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