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173 Cards in this Set
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- Back
Lispro, aspart
Soluble or regular insulin NPH Ultralente Glargine |
Ultra Rapid
Rapid Acting Intermediate acting Slow Ultraslow peakless |
|
Sulfonylureas
1st gen – Tolbutamide, Chlopropamide 2nd gen – Glyburide, Glipizide |
Stimulate insulin release from the pancreas
Requires β cell for action Binds to ATP-sensitive K+ channel ↓ its conductance → mimic normal insulin secretion from pancreas Effectively absorbed through the GI tract T2DM therapy Risk of inducing hypoglycemia → can progress to coma & death Very long half life Stimulates appetite → contribute to obesity problem |
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Glitinides
Repaglinide Nateglinide |
Similar action to sulfonylureas
Very rapid-acting & short duration Take orally @ mealtimes ↓ post prandial peak in blood glucose Flexible dosing |
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Biguanides
Metformin (Glucophage) |
Lowers blood glucose levels
Does not stimulate insulin release 2 main actions: ↓ gluconeogenesis - ↓ glucose output from liver ↓ insulin resistance - enhanced insulin action on peripheral tissues T2DM NO risk of hypoglycemia Associated anorexia may lead to weight loss May be used in combo w/ sulfonylureas GI disturbances: Lactic acidosis: o Potential fatal lowering of blood pH |
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Thiazolidinediones (TZDs) or Glitazones
Rosiglitazone (Avandia) Pioglitazone (Actos) Troglitazone |
Potentiates insulin action on peripheral tissue
↓ insulin resistance Does not stimulate insulin release Agonistic binding of peroxisomal proliferator activator receptor (PPARγ) found in white adipocytes T2DM NO risk of hypoglycemia Useful following failure of sulfonylureas and/or metformin or in combo Edema; CI in pts w/ CVD Potential hepatoxicity |
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Incretins
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Oral glucose induces release of gut hormone GLP-1 → acts on β cell to amplify insulin release
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Exenatide (Byetta)
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Newly approved GLP-1 analog from reptilian salivary glands
Longer half life than endogenous form Resistant to DPP-4 protease turnover Induces insulin release Depress glucagon releases Blunt post-prandial glucose surge Delays gastric emptying T2DM SubQ injection Significant weight losses through blunting of appetite Nausea ↑ risk of hypoglycemia when used in combo w/ sufonylureas |
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DDP-4 Inhibitors
Sitagliptin |
Newly approved
↑ half life & action of endogenous GLP-1 T2DM PO drug No associated GI disturbances No effect on weight loss Possible toxicities |
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α-Glucosidase inhibitors
Acarbose Miglitol |
↓ intestinal absorption of glucose
Slows intestinal degradation of starches & sucrose Blunt post prandial spiking of blood glucose levels T2DM Not effective as 1o therapy May be used w/ other drugs Flatulence diarrhea |
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Levothyroxine
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T4
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LiothyronineNA
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T3
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Thioureylenes
-Methimazole propulthiouracil |
Inhibit tyrosyl iodination vs competitive inhibition on thyroid perox.
takes several weeks to months due to large store and slow turnover of t3/t4 |
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High dose Iodide
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Lowers hyperthyroid only intially used presurgically reduces size and vascularity
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Proponolol for hyperthyroidism
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Sx relief (tachy card, arryth, tremor)
Used during lag period whcih follows thioureylene therapy. |
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Prednisone
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Liver to act --> prednisolone
SE: Cusingoid appearance/ lethal infections. Think skin,moon face, cataracts, atheroscler, Osteoporosis (osteoblast inh lower ca uptake and inc. excretion) |
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Immunophinin binding agents (IL-2 inhib)
Calcinuerin inhibitors |
Cyclosporin (binds cyclophins can block mitogen induced act of synovial monnuc cells)
Tacrolimus(binds FKBPs lower IgE mediated resp) Immunosup effects come from binding and inhibiting calcinuerin phosphatase inhibiting action of NF-AT. 1) T-helper 2) variable bioavailability (monitor) 3)p450/ needs bils salt for abs |
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Non calcinuerin inhibiting agent: sirolimus
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Binds immunophillins, interferes w/ signal transduction via TOR.
Limits growth factor induced prolif SE: dyslipidemia, thrombocytopenia, antifibroblast action p450 same as tacro/cyclosporin |
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Azathioprine
|
Abs. by liver X.O.
-->6-MP lowers purine synth -->IL-2 Maintain organ tx. SE: mylosupression, anemia, alopecia, lethal w/ Allopurinol(blcoks XO) |
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Methotrexate (PS/RA)
|
Structural analog folic acid irrev.
effects DHFR--> effects purine/pyrimidine synth SE- Allopecia, CNS fatigue, GI |
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Cyclophosphamide (SLE, Wegeners, RA)
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Metab in liver -> 4OHphosphamide+aldophosphamide(active)
bind to enz od DNA- interfere Drug interactions 1) w/ sux up NM blockade due to lowering of psudeoCHE 2)alter hepatic microsomal enz act will alter cyclophosphamide levels 3)TC antidepressents may decrease bladder emptying and lead to prolonged bladder exposure to acrolein (hemmorhagic cystitis) Se: alopecia, anorexia, diarrhea. |
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Mycophenolate Mofetil
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Lympo specific due to inhib of de novo purine pathway. Inhibits IMPD lowering guanosine monophosphate adn increase adenosine (inhibits the PRPP).
|
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Leflunomide
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Inhibit pyrimidine synth.
Inhibit dihyroorate dehydrogenase Effective w/ Myco. Mofetil. SE: liver, kidney, tetragenic |
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3 factors that contribute to airway narrowing in asthma:
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o smooth muscle contraction
o ↑ mucous secretion o mucosal inflamm & swelling |
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Early onset/Extrinsic Asthma
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occur mostly in children and young adults
family hx common (+) skin hypersensitivity test Pathogenesis: abnormal immune response associated with allergy IgE, mast cell and Ca2+ mediated factor release (histamine, 5HT, Leuk) Leuk can recruit more inflamm cells to airway Therapeutic target is Ca2+ & cAMP mediated degranualtion |
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Late onset/Intrinsic Asthma
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Can occur at any age but most are adult pts
provoked by cold air, perfume, paint, tobacco smoke Emotional stress, infection, severe exertion no family hx (-) skin hypersensitivity test Pathogenesis: ↓ β-adrenergic responses o β2 receptor esponse normally relaxes bronchial muscle & ↓ gland secretion ↑ cholinergic responses o Muscarinic receptor response normally contracts bronchial muscle & stimulates gland secretion |
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Bronchodilators
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inhibit smooth muscle contraction and ↓ release of mediators
can rapidly reverse bronchospasm β2 agonist binding → Gs protein activation → activation of AC → ↑ cAMP o ↓ active form of MLCK = less smooth muscle contraction = bronchodilation o ↑ cAMP affects cAMP:cGMP ratio = ↓exocytosis of chemical mediators = ↓ bronchial gland secretion α receptor activation → IP3 stimulated Ca2+ release from ER → constrict bronchial mucosal vessel & ↓ blood flow → ↓ congestion & edema |
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Albuterol
(salbutamol |
short-acting
racemic mixture B2 agonist selective |
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Levalbuterol
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short-acting (R-isomer)
FDA approved for: prevention and txmt of bronchospasms in pt at least 12yo useful in pt refractory to racemic mixture of albuterol Selective β2 agonists |
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Pirbuterol
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short-acting
Selective β2 agonists |
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Formoterol
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long-acting
FDA approved for: maintance txmt prevention of exercise-induced bronchospasm Selective β2 agonists |
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Xanthines-Theopylline
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Stage I (mild asthma w/ little obstruction )
PO: Stage II (moderate obstruction) IV: Stage III (severe obstruction) & Stage IV (marked hypoxemia) ↑ cAMP by diff route than β2 agonist inhibits the actions of phosphodiestease can be used as synergistic therapy SE: Narrow therapeutic window → must monitor carefully plasma conc > 25 ug/ml o high probability of seizure o arrhythmia, hypotension, cardiac arrest Adverse effect: N/V Drug interaction/Toxic effect: Babituates → speed rate of elimination & interfere with blood level Caffeine → competes w/ common metabolic enzyme & CNS/ CV effects |
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Inhaled corticosteroids
Budesonide Fluticasone Beclomethasone Triamcinolone Propionate Mometasone furoate Flunisolide |
Fluticasone & Budesonide:
preferred agents bc their long duration of action & high local potency w/ less systemic effects indirectly act on to relieve or prevent airflow obstruction ***have NO effect on IgE-dependent secretion of mediators suppress hypothalamic-pituitary-adrenal fxn o cushion’s syndrome o growth retardation if ↓ suddenly → danger of no recovery of adrenal fxn and poor response to stress SEs more prevalaent w/ systemic administration than inhalants |
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Prednisone
Prednisolone |
Oral Corticosteroids
PO or IV dramatic relief in severe asthma – stage III and IV not effective in inhibiting IgE mediated release thought to stabilize biomembrane inhibit inflammatory rxt enhance response of B receptor to adrenergic transmission |
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Cromolyn Sodium
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Oral Corticosteroid
used extensively for prophylactic tx of mild to moderate asthma stabizes membrane of mast cell to prevent release of mediators probably block Ca channel inhibit Ca influx across mast cell membrane does not relax smooth muscle NOT to be used for acute bronchospasm Few SEs → sore throat, dry mouth, skin rash, head ache, dizziness |
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Alprostadil (PGE1)
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Still in experimental stages, not yet in clinical use activate AC → ↑ cAMP
have effects on airway smooth muscle relaxation |
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Anticholinergenic Asthma agents
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Anticholinergic agents
Historically Atropine was used to treat bronchial asthma but have severe cholinergic SEs w/ the availability of β agonists these anticholinergic agents are no longer used to treat bronchial asthma ***KNOW THIS*** inhalational analogs may used for chronic bronchitis & COPD Ipratropium bromide o Short acting bronchodilator for patients with chronic bronchitis and COPD Tiotropium bromide o Long acting anti-cholinergic drug approved by FDA for once-daily txmt of bronchospasm associated with COPD |
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Zileuton
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affect the allergic reactions upstream of inflammatory cascade
Not used anymore Freq doses req for effectiveness Leukotriene synthesis inhibitor |
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Zafirleukast
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affect the allergic reactions upstream of inflammatory cascade
Not used anymore Leukotriene synthesis inhibitor Interacts w/ food in the stomach |
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Montelukast (Singular)
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affect the allergic reactions upstream of inflammatory cascade
PO drug Used for asthma, seasonal allergic rhinitis and perennial allergic rhinitis in adults & children Cysteinyl Leukotriene D4 receptor antagonist |
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Omalizumab (Xolair)
|
affect the allergic reactions upstream of inflammatory cascade
SQ Used for pts at least 12yrs old Moderate to sever asthma Inhibits IgE |
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Xanthines
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Theopylline
|
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Theopylline
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Stage I (mild asthma w/ little obstruction )
PO: Stage II (moderate obstruction) IV: Stage III (severe obstruction) & Stage IV (marked hypoxemia) ↑ cAMP by diff route than β2 agonist inhibits the actions of phosphodiestease can be used as synergistic therapy NarrowSE: therapeutic window → must monitor carefully plasma conc > 25 ug/ml o high probability of seizure o arrhythmia, hypotension, cardiac arrest Adverse effect: N/V Drug interaction/Toxic effect: Babituates → speed rate of elimination & interfere with blood level Caffeine → competes w/ common metabolic enzyme & CNS/ CV effects |
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Methimazole
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Thiourelene
Inhibit tyrosyl iodination vs competitive inhibition on thyroid perox. takes several weeks to months due to large store and slow turnover of t3/t4 |
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Glipizide
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2nd gen Sulfonylureas
Stimulate insulin release from the pancreas Requires β cell for action Binds to ATP-sensitive K+ channel ↓ its conductance → mimic normal insulin secretion from pancreas Effectively absorbed through the GI tract Risk of inducing hypoglycemia → can progress to coma T2DM therapy & death Very long half life Stimulates appetite → contribute to obesity problem |
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Glyburide
|
2nd gen sulfonylureas
Stimulate insulin release from the pancreas Requires β cell for action Binds to ATP-sensitive K+ channel ↓ its conductance → mimic normal insulin secretion from pancreas Effectively absorbed through the GI tract Risk of inducing hypoglycemia → can progress to coma T2DM therapy & death Very long half life Stimulates appetite → contribute to obesity problem |
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Tolbutamide
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1st gen Sulfonyurea
Stimulate insulin release from the pancreas Requires β cell for action Binds to ATP-sensitive K+ channel ↓ its conductance → mimic normal insulin secretion from pancreas Effectively absorbed through the GI tract Risk of inducing hypoglycemia → can progress to coma T2DM therapy & death Very long half life Stimulates appetite → contribute to obesity problem |
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Chlopropamide
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1st gen Sulfonyurea
Stimulate insulin release from the pancreas Requires β cell for action Binds to ATP-sensitive K+ channel ↓ its conductance → mimic normal insulin secretion from pancreas Effectively absorbed through the GI tract Risk of inducing hypoglycemia → can progress to coma T2DM therapy & death Very long half life Stimulates appetite → contribute to obesity problem |
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Norepinephrine (levarterenol
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ADRENERGIC AGONISTS
Direct Acting mostly α agonist, some β1 vasoconstrict = ↑systolic and diastolic BP, reflex ↓HR. Maybe tx for shock; NEVER used for asthma |
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▫Isoproterenol
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ADRENERGIC AGONISTS
Direct Acting β1& β2 agonist, synthetic ↑↑HR, contraction = ↑CO = tx. AV block or cardiac arrest; dilates dilates sk. musc. aa = ↓BP Up Sys down Dias can lower CO if pooling of blood too much |
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Dobutamine
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ADRENERGIC AGONISTS
Direct Acting β1> β2 agonist used to ↑CO in congestive heart failure w/o affecting HR or myocardial O2 demands ↑atrial conduction, so beware if pt. has atrial fibrillation |
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Phenylephrine
|
ADRENERGIC AGONISTS
Direct Acting α1>α2 agonist, synthetic ↑syst & diast BP w/o effect on heart, but causes reflex bradycardia; also nasal decongestant, mydriatic, shock not catechol derivative, so not substrate for COMT |
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Methoxamine
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ADRENERGIC AGONISTS
Direct Acting α1>α2 agonist vasoconstricts →↑peripheral resistance; has good effect on vagus = tx for supraventricular tachycardia or to overcome hypotension induced by halothane in surgery |
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▫Clonidine(catapress)
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ADRENERGIC AGONISTS
Direct Acting α2 agonist tx. HTN, or to minimize withdrawal from opitates/benzodiazos sudden withdrawal = HTN crisis; drymouth is very common side effect |
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▫Methyldopa(aldomet)
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ADRENERGIC AGONISTS
Direct Acting α2> α1> β met. by DD, then DBH to α-methyl NE, which has ↓affinity for , but for ; stored and released with NE; controls CNS and JG of kidney to ↓renin = ↓BP penetrates BBB |
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▫Terbutaline, ▫Albuterol, ▫Ritodrine
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ADRENERGIC AGONISTS
Direct Acting β2 agonist bronchodilator, or ↓ uterine contractions in premature labor also ▫Orciprenaline |
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Dopamine
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ADRENERGIC AGONISTS
Direct Acting activates β1 in heart = ↑CO, at high dose, activates α = vasoconstriction; dilates renal and splanchnic BVs via D receptors = independent of adrenergic action = tx. shock much better than NE b/c NE blocks blood to kidney and may lead to kidney shutdown |
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Cocaine
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Indirect Acting
reversibly binds NET = potentiates NE and Epi = CNS stimulation; has local anesthetic action @ high doses |
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▫Amphetamine
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Indirect Acting
branched chain = high affinity for MAO, but poor substrate accum. in nerve release of NE non-exo = tx for narcolepsy & ADD; but OD=psycho, BP, angina, arrhythmia; lasts 3 hrs crosses BBB, CNS arousal, tolerance dev. to amphets “tachyphylaxis” |
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Tyramine
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Indirect Acting
decarboxylation of tyrosine, found in wine/cheese, given IV accum. by NET in neuronrelease of NE, causes dose-dep HR, BP, resembles NE; lasts 3 minutes NO BBB, Ca independent, substrate for MAO = don’t give w/ MAOIs, delays oxidation of NE |
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tricyclic antidepressants
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Indirect Acting
(imipramine, desipramine, amitryptyline) very potently block NET, also block 5HT, and at high conc, block receptors for muscarinic, histamine and 1 cause tremor, insomnia, blurry vision, orthostatic HTN |
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Ephedrine
|
Direct and Indirect Acting (Mixed)
similar to amphet, but has adrenergic effects too. 3hrs tx. asthma; mydriatic; decongestant OD=confusion, anxiety, BP, angina, arrhythmia, ↓appetite, ↓sleep |
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Metaraminol
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Direct and Indirect Acting (Mixed)
has actions similar to NE; tx. shock or HTN |
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Phenoxybenzamine
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ADRENERGIC ANTAGONISTS
Alpha Blockers irrev. & noncomp. blocks all alphas, ACh,5HT,histamine prevents vasoconstriction, reverses alpha effects of EPI; tx. pheochromocytoma, Raynaud’s disease adverse = postural hypotension, nausea, vomiting, may HR, impotence |
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Phentolamine
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ADRENERGIC ANTAGONISTS
Alpha Blockers irrev. & noncomp. blocks all alphas same as phenoxybenzamine, may be used to dx pheochromocytoma, or to tx. HTN crisis after eating tyramine |
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Prazosin
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ADRENERGIC ANTAGONISTS
Alpha Blockers comp. block α1 ↓peripheral resistance, ↓BP w/o affecting heart or kidney = good HTN tx.; tx. benign prostatic hypertrophy by urine flow; ↓preload and afterload = tx. congestive heart failure prazosin often leads to edema = give with a diuretic; Doxazosin (Cardura) = newer analog w/ longer t1/2 |
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▫Tamsulosin (flomax)
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ADRENERGIC ANTAGONISTS
Alpha Blockers selective for α1a blocks a1a, which is all over prostate = tx. ben. pros. hypertrophy |
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Yohimbine
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ADRENERGIC ANTAGONISTS
Alpha Blockers blocks a2 only tx. for impotency (actual effectiveness is questionable.) |
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▫Propanolol
▫Carteolol, ▫Nadolol ▫Levobunolol, ▫Pindolol, ▫Timolol ▫Penbutolol |
Beta Blockers
blocks b1 & b2 ↓HR, ↓force=↓CO; ↓conduction; blocks renin release = tx. HTN, angina and arrhythmias; also tx. coronary artery disease b/c blocks stress-induced demands for 02 by heart; useful to tx. heart probs in hyperthyroidism; tx. migraines, anxiety, glaucoma via ↓ prod of aq. humor. not for pts. w/ COPD or asthma; must withdraw gradually; NEVER use w/ verapamil or diltiazam = AV block note: Pindolol doesn’t block renin, but is still good tx. for HTN |
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Acebutolol
▫Betaxolol, ▫Esmolol ▫Atenolol, ▫Metoprolol |
Beta Blockers
blocks only b1 = cardiac selective remember A BEAM of b1 blockers |
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Labetelol
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Alpha AND Beta Blockers
competitively blocks b1,b2,a1 (but not a2) tx. HTN w/ angina, pheochromocytoma; not as potent as individual or blockers; mem. stabilizer = local anesthetic action; also can block neuron uptake of NE = cocaine-like action |
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Guanethidine
(ismalin) |
Synthetic, oral ↓BP, ↓HR, ↓renin; taken up by NET, blocks exocytosis independent of Ca: 1. enters neuron, blocks transmission (acute); 2. blocks NET (acute); 3. ↓NE stores (chronic)
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Reserpine(serpasil)
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alkaloid, oral, irreversible binding; no effects on cholinergics=parasymp tone progressive loss of NE tissue stores =↓↓↓autonomics; blocks NE transport; MAO oxidizes the NE; also blocks DA trans=↓ DA in brain; also ↓5HT from nerves, ↓histamine from platelets lasts 1 wk; also miosis, salivation, gastric sec., ↓HR, ↓BP, depression, diarrhea, peristalsis, tremor, suicide
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alpha-methyl-tyrosine (metyrosine)
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TH inhibitor, competes w/ tyrosine, blocks formation of DOPA = depletes NE stores. Former tx. for pheochromocytoma no longer used. Crystallizes out in urine = renal damage
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Colchicine, Vinblastine & Vincristine (Vinca Alkaloids)
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depolymerize cell cytoskeleton, block fast axonal transport = blocks NE from cell body going to synapse
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Acetylcholine
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AGONISTS
direct intracoronary injection to dx. vasospastic angina pectoris |
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▫Pilocarpine
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AGONISTS
natural, tertiary, M -topical miotic for glaucoma -tx. drymouth in cancer or Sjogren’s synd. (autoimmune salivary dysfxn) |
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▫Cevimeline (Exovac)
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AGONISTS
M tx. for drymouth met. by CYP2D6 and 3A3/4= maybe toxic w/ ketoconazole etc |
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Methacholine
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AGONISTS
synthetic, quaternary, M in heart -old tx for tachycardias -aerosol to dx. bronchial hyperreactivity not met. by cholinesterases = longer duration than ACh |
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▫Carbamylcholine (Carbachol)
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AGONISTS
synthetic, quaternary, M & N topical miotic agent not met. by AChE |
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▫Bethanechol (Urecholine)
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AGONISTS
synthetic, quaternary, M in GI & UT -tx. stasis conditions of bladder or GI, esp. post-partum and after general anesthesia -not. met by cholinesterases -don’t give if GI obstruction (P) |
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Nicotine
|
AGONISTS
natural, lipid soluble tertiary, N -leads to conversion from activation to depolarizing blockade -tx. for nicotine withdrawal sx. -maybe good for cognition in Alzheimer’s, ↓Parkinson’s BEWARE acute poisoning = ANS stim, CNS excitation, convulsions, depression, sk. m. paralysis -crosses placenta, sec. in milk -widely dist. in CNS -highly addictive |
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▫Physostigmine (Antilirium)
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REVERSIBLE CHOLINESTERASE INHIBITORS
natural, tertiary, M & N topical miotic for glaucoma met. by plasma ester hydrolysis -can cause seizures |
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▫Neostigmine (Prostigmin)
|
REVERSIBLE CHOLINESTERASE INHIBITORS
synthetic, quaternary, N -Anticholinesterase AND agonist action = tx myasthenia gravis -motility of GI or UT -reverses sk. m. blockade by competitive antagonist (d-tubocurarine) -oral abs. 15X less than parenteral met. by plasma ester hydrolysis |
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Pyridostigmine
|
REVERSIBLE CHOLINESTERASE INHIBITORS
same as neo, but longer duration = most common oral tx for myasthenia |
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Edrophonium
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REVERSIBLE CHOLINESTERASE INHIBITORS
synthetic, quaternary -Anticholinesterase AND agonist action at motor endplate = systemic action is almost totally on sk. m. = diagnostic for myasthenia only lasts 5 min |
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Tacrine
|
REVERSIBLE CHOLINESTERASE INHIBITORS
not used much anymore -tx. cognitive sx. of Alzheimer’s (but not dementia) -crosses BBB, hepatotoxic |
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Donepezil
|
REVERSIBLE CHOLINESTERASE INHIBITORS
piperidine-based -tx. cognitive sx. of Alzheimer’s w/ long duration = once daily dose milder side effects, no hepatotoxicity met. by CYP2D6 and 3A3/4 |
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▫Rivastigmine (Exelon)
|
REVERSIBLE CHOLINESTERASE INHIBITORS
carbamate structure Alzheimer’s tx that is met. slower, also inhibits pseudoChE good if poor response to donepezil |
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▫Galantamine (Reminyl)
|
REVERSIBLE CHOLINESTERASE INHIBITORS
tertiary alkaloid Alzheimer’s Tx |
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Echothiophate
|
IRREVERSIBLE CHOLINESTERASE INHIBITORS (ORGANOPHOSPHATES)
very polar, exc. in urine, lipid soluble, so can be abs. thru skin topical miotic agent for eye (effects last 3 days) |
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malathion
|
IRREVERSIBLE CHOLINESTERASE INHIBITORS (ORGANOPHOSPHATES)
very polar, exc. in urine, lipid soluble, so can be abs. thru skin common home and garden insecticide, controls lice topically can be met. by mammals |
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Parathion
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IRREVERSIBLE CHOLINESTERASE INHIBITORS (ORGANOPHOSPHATES)
very polar, exc. in urine, lipid soluble, so can be abs. thru skin must first be conv. in liver to active form, paraoxon; only for pros is NOT met. by mammals |
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Sarin
|
IRREVERSIBLE CHOLINESTERASE INHIBITORS (ORGANOPHOSPHATES)
very polar, exc. in urine, lipid soluble, so can be abs. thru skin “nerve gas” for war, terrorism |
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Atropine
|
MUSCARINIC ANTAGONISTS
natural alkaloid tx for motor symptoms of Parkinson’s -can block vagal afferents to heart = tachycardia = tx. for sinus bradycardia after MI -↓motility in GI, threshold volume for sensory micturation reflex -sustained cyclopegia and mydriasis topically on eye “atropine flush” @ toxic levels -mainly met. in liver, some exc. unchanged in urine "Dry as a bone, red as a beet, blind as a bat, mad as a hatter" |
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Scopolamine
|
MUSCARINIC ANTAGONISTS
100X more potent than atropine in ascending reticular core =produces somnolence and hypnosis with amnesia may produce delerium and hallucinations -anti motion sickness (abs. thru skin well enough to give as patch) |
|
Tolterodine
|
MUSCARINIC ANTAGONISTS
tertiary tx. for urinary urgency met. by liver |
|
Oxybutinin
|
MUSCARINIC ANTAGONISTS
tertiary tx. for post-operative bladder spasm, also tx for urinary urgency met. by liver, available as patch |
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Tropicamide
|
MUSCARINIC ANTAGONISTS
tertiary short-duration mydriatic/cycloplegic topical on eye |
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Ipratropium
|
MUSCARINIC ANTAGONISTS
quaternary tx. as aerosol for COPD, asthma, etc… |
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Propantheline
|
MUSCARINIC ANTAGONISTS
quaternary spasmolytic for GI tract, tx. for GI hypermotility |
|
▫Benztropine (Cogentin)
|
MUSCARINIC ANTAGONISTS
tertiary -tx parkinson’s motor sx. |
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Pirenzepine
|
MUSCARINIC ANTAGONISTS
tertiary, M1 under investigation for peptic ulcer. No heart side effects |
|
▫d-tubocurarine
|
NICOTINIC COMPETITIVE ANTAGONISTS
natural alkaloid -↓BP initially due to: 1. ANS ganglia block, 2. Histamine from Masts t0.5=3.8hr, ½ met., ½ exc kidney |
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vecuronium
|
NICOTINIC COMPETITIVE ANTAGONISTS
synthetic, steroid-based slight ganglionic blockade can reduce GI tract motility, very popular no histamine release biliary excretion |
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atracurium
|
NICOTINIC COMPETITIVE ANTAGONISTS
synthetic only a little Histamine release, intermediate duration of action landanoside, a breakdown. product, may excite the CNS inactivated by spont. breakdown. since unstable at plasma pH = safe for renal and hepatic failure |
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doxacurium
|
NICOTINIC COMPETITIVE ANTAGONISTS
specific for neuromuscular jxn = few side effects, no Hist., long action exc. by kidney |
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mivacurium
|
NICOTINIC COMPETITIVE ANTAGONISTS
shortest duration, slow onset, only a little Histamine release met. by pseudoChE’s in plasma |
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Succinylcholine
|
DEPOLARIZING BLOCKERS
synthetic rapid onset, 5 min duration; significant hyperkalemia best for relaxing laryngeal mm. to insert an airway pseudoChE met. to succinic acid and choline some hist release |
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▫Trimethaphan (Arfonad)
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GANGLIONIC BLOCKADE AGENTS
blocks early EPSP and thus ganglionic transmission tx. HTN emergencies, or create hypotension for brain surgery |
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Hexamethonium
|
GANGLIONIC BLOCKADE AGENTS
quaternary amine possible HTN drug |
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Mecamylamine
|
GANGLIONIC BLOCKADE AGENTS
secondary amine possible use for nicotine-sensitive CNS disorders like Tourette’s |
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▫Botulinum Toxin A (Botox)
|
ACh RELEASE BLOCKERS
local injection to tx strabismus, torticollis, wrinkles, possibly migranes |
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Dantrolene
|
blocks Ca from sarcoplasmic reticulum. Used only for spasticity tx. in pts w/ upper motor neuron lesions, malignant hyperthermia
|
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Cromolyn Sodium
|
Block Ca influx and release of hitamine.
|
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Compound 48/80
Polymixin B |
Ionophores result in influx of Ca release of hist
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Morphine and Turbocurarine
|
Also stimulate histamine release
Dissoc histamine from heparin-chondotrin complex inside granules |
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H1 receptors
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Smooth muscle of gut and bronchi, endothelium, and in brain PLC pathway
|
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H2 receptors
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Gastic mucosa and cardiac muscle cells, brain cAMP pathway
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First Generation Antihistamines
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Diphenhydramine
Dimenhydrinate Chlorpheniramine Hydoxazine Meclizine Promethazine |
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Second Generatin AntiHist
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Fexfenadine
loratadine cetirizine |
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Serotonin Clinc signficiance
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Migraine and cluster headaches
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Effects of Aluminum
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Constipation
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effects of Magnesium
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Diarrhea
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Antihistamines: (to reduce gastric acidity)
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H2 Antagonists effective in healing of gastric and duodenal ulcers.
Dine w/ FRANC Famotidine, Ranitidine, Nizatidine, Cimetidine |
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Famotidine
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H2 Antagonists effective in healing of gastric and duodenal ulcers.
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Ranitidine
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H2 Antagonists effective in healing of gastric and duodenal ulcers.
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Nizatidine
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H2 Antagonists effective in healing of gastric and duodenal ulcers.
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Cimetidine
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H2 Antagonists effective in healing of gastric and duodenal ulcers.
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Proton Pump Inhibitors
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-prazole; activated in acid enviroment of secreteory canaliculus of parietal cell. Useful in gastric and duodenal ulcers, severe gastroesophogeal disease, and Zollinger-Ellisons
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Somatostatin Analog
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Octreotide
Somatostatin suppresses the release of gastrointestinal hormones Gastrin Cholecystokinin (CCK) Secretin Motilin Vasoactive intestinal peptide (VIP) Gastric inhibitory polypeptide (GIP) Enteroglucagon |
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Sucralfate
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Directly inhibits pepsin and bile action w/ out changing pH of stomach.Not an antacid. Coats ulcerbed
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Bismuth Subsalicylate
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Ulcer, coating, and protection from acid and pepsin.
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Prostaglandins In GI
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May prevent Gastric acid secretion by blocking histamine stim cAMP. Misoprostol is crug of choice esp when ulcers from NSAID.
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Metoclopramide
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Choinomimetic, increase resting ton eof lower esophageal sphinc. and stomach that makes the compoud useful in reflex esoph. accelerates gastric emptying and shortens bowel transit time. Dopamine antagonist so strong antiemetic properties.
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Treatment H.pylori
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2 ab w/ a proton pump inhbitor
= Amox, Clarithro+ propumpI oor bismuth, metronidazole, h2 blocker, tetracycline |
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Apomorphine
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Emetic Agent
potent DA agonist binds CTZ on 4th vent->Reticular Medulla |
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Vommiting Physiology
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Sensor->CTZ (DA rec 4th vent)->reticular core medulla-> vomit
Inc pulse, salivation,dilation of pupils, pallor. contract of pylorus and relax of gi smooth muscle, tensing of abdominal and intercostal m, reverse paristalis in lower esophogus. After: reflex bradycardia, fall in bp, faintness. |
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Ipecac syrup
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Stomach irritant and some direct CTZ action
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Antiemetics
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Most are Da Antagonists at CTZ
Chlorpromazine prochlorperazine trimethobenzmide metochlopramide ondansetron |
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Chlorpromazine
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Antiemetics
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prochlorperazine
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Antiemetics
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trimethobenzmide
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Antiemetics
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metochlopramide
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Antiemetics
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Dimenhydrinate
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Anti motion sickness agent Block H1 receptor
anti histaminic and acts by blocking synaptic relay along 8th cranial nerve. |
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Castor Oil
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TAG of ricinoleic acid from castor beans. Acid stimulates GI tract motility by irritant action from the small intest on. Premotes evac of small and large intest. Used prior to surgery should not be used during pregnancy may induce premature labor
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Dipheylmethanes-phenolphthalein
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motility stimulant
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Emodin alkaloids
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aloes cascara, senna stimulate peristalsis metabolized by bacteria.
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Mineral Oil
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Stool softener-promote laxation by coating and lubricating fecal matter, prevent norm absorption water.
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Glyercerin
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Administered as rectal supposityro, lubricate and produces local irriation of the rectum that helps initate defecation reflex
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Opiates in Gi
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Anti diarrheal-sustained contract of intesting and interrup normal seq of peristaltic contractions.
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Diphenoxylate and atropine
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Antidiarhetic
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Loperamide
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Inhib ach from presynaptic opiod recep. in ENS Antidiarrhetic motility agent
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Absoben powders
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absorb water and toxins to provide protective coating to inflamed intestine-kaolin,pectin,bismuth subsalicate
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Aspirin(acetyl sialicylic acid)
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Irreversible
Absorbed/accumulate in stomach lining Metab by liver, 0 order @ pharm doses, excreted kidney Inhibits cox 1> cox 2 irrevsibly acetylates enz. Limitations- gastric irritation- inhibits cox 1 PG imp in mucin secretion Percipitates gouty attacks, reyes syndrome, renal tox, allergy OD: tinnitis, vertigo, hypervent ->resp alkalosis->metabolic acidosis tx to alk urine. |
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Acetameniphen (not nsaid)
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Nonspecific cox inhibitor
Analgesic, antipyretic, not anti inflam. can cause irrev hepatotoix/renal tox prompt treat w/ acetylcystine |
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Nonselective cox inhibitors- Antiinflam,analgesic,antipyretic
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Ibuprofen, Naproxen, indomethacin
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Ibuprofen, Naproxen (longer 1/2 life than ibu)
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Milder GI effects than other cox inhibitors. rare hematological,renal comp.
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Indomethacin
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Powerful NSAID
SE: GI, ANemia,Coronary artery, Hyperkalemia Used in gout short term, not in children unless ductus arteriosus |
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Celecoxib
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Cox 2 inhibitor- reversible
Lower GI irritability Increase Prothrombin time High incidense of MI/sudden cardiac death |
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Misoprostol
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Synthetic Prostoglandin, prevent ulcers when used w/ NSAID/ sever diarrhea +miscarrige
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NSAID renal effect and DDI
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lowers renal PH synth-> lowers BF->fluid retention
lowers effictivness of b-blockers, diuretics, ACE inhibitors, increases tosix effects of many drugs |
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Methotrexate
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Standard for RA
Lymphocytes ( lowers cytokine prolife) PMN's (lower chemo, free rda) Inhibit DHFR-> thymidine def SE:GI, HEmatological,Hepatic, teratogenic |
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Hydroxychloroquinone
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Malaria/Ameoba's (also RA)
Reduce chemotaxis,phagocyt,superox in PMN's 3-6 months no mylosupression not for G6PD def. monitor vision |
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Sulfasalazine
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Inflam bowel disease/RA
split in GI-> Aminosialic acid+sulfapyridin (active) SE:rashes, GI,photosen NOT for G6PD |
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Leflunomide
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Hepatic Metab to act p450 (used in RA)
Inhibit Dihydrorotate dehydrogenase Pyrimidine def Diarrhea, hair loss, Hepatic damage |
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Azathioprine
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Converted to 6-MP
Inhibit purine synth |
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TNF-a Inhibitors
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T(adal) N(et) F(lix)
Adalimumab- human Ig Etanercept- TNF rec/ IgG Fc Imfliximab- chimera human mouse anti tnf SE: MS, Heart failure,SLE |
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Anakinra
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IL-1 rec competitive antagonist
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Abatacept
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T lymp asoc Ag 4 +Fc
RA-inhibit T cell Dont give w/ TNF inhitors-Infection COPD pulm effects |
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Rituximab
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RA-Chimeric Ab B cell cd20->apop
used w/ methotrexate when resist to TNF-a SE: infusion reactions, act hep B, Viral infections |
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Gout
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Xanthine->Hypoxanthine->uric acid(recurrent inflam)
Ibuprofin, Indomethacin Tx |
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Allopurinol
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Inhibit XO, prevent attacks no relief. SE: skin rxn.Gi, marrow sup
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Probenecid
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Inhibit urate prox reabsorption
(asprin inhbits urate exretion raises gouty attacks) SE: aplastic anemia, dermititis |