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59 Cards in this Set
- Front
- Back
Allopurinol MoA
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Inhibits xanthine oxidase
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Isoniazid
-MoA - SE |
MoA: Nicotinic acid derivative that inhibits synthesis of mycolic acid in mycobacteria wall
SE: Causes pyridoxine deficiency leading to peripheral neuropathy & sideroblastic anemia |
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Succinycholine
- Use - MoA - Duration of action |
Use: Depolarizing agent used as muscle relaxant during surgery
MoA: Binds to nicotinic receptors in skeletal muscle causing persistent depolarization at motor end-plate. Duration: 5-10 minutes Effects are not reversed by cholinesterase inhibitors - no pharmalogic antidote to OD. - some pts have atypical cholinesterase & can't metabolize drug. |
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Preganglionic Neurotransmitter Acetylcholine
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- activates muscarinic and nicotinic receptors
- muscarinic effects: 1) pupillary miosis (contracts iris sphincter, used after cataract surgery) 2) accomodation of lens for near vision (contracts ciliary muscles) 3) bronchconstriction 4) SA node effect (slows HR) 5) AV node effect (increase PR interval) 6) Stimulate GI secretions 7) Stim. GI motility (enteric nervous system stim) 8) Micturition (stim detrusor muscle, which relaxes internal sphincter of bladder) |
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Nitric Oxide
-Use -MoA -Acetylcholine |
Use: Potent vasodilator in endothelial cells
MoA: inactivates myosin light chain kinase in SM cells leading to vasodilation. Acetylcholine: can lead to its synthesis when injected into vessels. |
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Woman in 3rd trimester has premature contractions.
-DOC -MoA |
DOC: Terbutaline
MoA: selective Beta-2 adrenergic receptor agonist that inhibits uterine contractions. |
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Effect of aspirin on the kidney
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Decrease PGE2 synthesis (vasodilator) leading to unopposed AT II effect & renal papillary necrosis
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Methotrexate
-MoA - SE |
MoA: Blocks dihydrofolate reductase - macrocytic anemia due to folate deficiency.
- S phase inhibitor Use: interstitial fibrosis in lungs. |
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Peripheral neuropathy & cancer drug:
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Vincristine
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Nerve-ending locations affected by botulinum poison, reserpine, guinethidine
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That's it.... just a free information slide!!!! HA
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MoA of Sucralfate
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- viscous polymer of sucrose octasulfate + aluminum hydroxide that adheres to ulcer crater
- Stimulates PGE2 in mucous cells (responsible for mucous border) |
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Effect of mixing statin drugs w/niacin
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- rhabdomyolysis: each drug by itself can produce rhabdomyolysis
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MoA of Amphotericin B
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- Binds ergosterol in fungal cell membrane (increases permeability)
Note: Nyastatin has same mechanism |
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Moa of Clotrimazole
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- inhibits ergosterol synthesis
Note: other azole compounds have similar action. |
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MoA of Flucytosine
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inhibits nucleic acid synthesis
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MoA of Grisefulvin
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inhibits microtubule function & mitosis
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Define potency
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measure of efficacy in terms of a drug
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Define Efficacy
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the ability to provide a clinically measurable effect
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Propyithiouracil
- DOC - Can it be used in pregnancy? |
DOC: decreasing synthesis of thyroid hormone in Grave's disease & Agranulocytosis
Preganancy: yes |
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Fastest way to increase HR in shock:
- Best drug for to increase HR and renal vasodilation |
Meds w/decreasing effectiveness:
1) isoproterenol 2) Dobutamine 3) Dopamine - Dopamine in low doses. |
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Dapsone
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-Sulfone that inhibits synthesis of folic acid by M. Lepae
- may precipitate hemolytic anemia in G6PD deficiency - May produce methemoglobinemia, nephrotic syndrome & peripheral neuropathy. |
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Prolongation of QRS on ECG:
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Quinidine
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Anticonvulsant/antiepileptic drug w/effect on epiphyseal plate:
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phenytoin via its revving up of cytochrome system int eh liver and causing Vit D deficiency (increased metabolism of 25 hydroxylated Vit D)
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MoA of Ondansetron
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- Selective serotonin 5-HT3 receptor antagonist.
- useful in blocking chemoreceptor trigger zone (CTZ) in the area postrema, hence preventing vomiting. |
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Opioid OD
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Respiratory depression - respiratory acidosis
-miotic pupils. |
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First Rx of Alcoholic in ER
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IV thiamine to prevent acute Wernicke's encephalopathy.
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Heparin: MCC of _____ in hospital
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MCC of thrombocytopenia in hospital
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Acute Rx for Coumarin OD when bleeding is life-threatening:
- what about when it is less serious bleeding? |
fresh frozen plasma best choice.
-Use IM Vit K for less serious bleeds. |
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Nitrofurantoin:
-Where concentrated - Class |
- Concentrated in urine
- Urinary tract antiseptic |
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Cyclophosphamide:
- SE - Where activated? |
- Hemorrhagic cystitis, transitional cell carcinoma
- Activated (not metabolized) in the liver. |
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Doxorubicin & Prednisone is metabolized where?
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Liver
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How do you prevent gout after cancer therapy?
What is the danger? |
Prevent by giving allopurinol (xanthine oxidase inhibitor)
Danger of urate nephropathy |
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What drug would prevent muscle fasciulations after neuromuscular block?
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Initial effect of succinycholine
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MoA of Levodopa
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Blocks peripheral dopa decarboxylase
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Bronchial Asthma
-Mild/Mod - Severe |
Mild/Moderate: Albuterol
Severe: Corticosteroid |
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Rx of paroxysmal supraventricular tachycardia
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Adenosine, including its association w/WPW syndrome
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MoA of Clonidine:
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Activates Alpha2-adrenergic and imidazole receptors in the CNS which reduces sympathetic outflow from the vasomotor center in the medulla.
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Captopril
- SE |
Bradykinin SE include cough & angioedema - ACE normally degrades bradykinin.
- cough is not seen in Losartan |
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Hydralazine
- Preggo or no Preggo? - What drug induced Autoimmune DO can this cause? |
- Can be used in preggos
- Cause of drug-induced SLE |
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Pts w/HTN, hypernatremia & hypokalemia
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Losartan, an ATII receptor antagonist, is DOC.
- corrects HTN & elecrolyte problem (blocks release of aldosterone, hence sodium is lost in teh urine & potassium retained). |
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Rx for Pulmonary edema
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Loop diuretics to decrease preload.
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Urinary retention in prostrate hyperplasia
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Selective Alpha1-blocker, relax smooth muscle in bladder neck & prostate.
- examples: Prazosin & Terazosin |
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MoA of saw palmetto
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Anti-androgen effect - blocks androgen uptake & availability w/o altering serum levels.
- causes shrinking of transitiona zone of prostate around urethra |
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Narcolepsy
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Rx w/amphetamines
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Premature labor & must deliver baby
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Give glucocorticoids to increase surfactant synthesis
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Drug used to eliminate Calcium in pt w/hypercalcemia
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Loop diuretic
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Drug used to remove calcium from urine in a calcium stone former.
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Hydrochlorothiazide
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Pt w/respiratory alkolosis & then metabolic acidosis:
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Salicylate intoxication
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S-phase drug used in tx of acute lymphoblastic leukemia:
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methotrexate
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Analog of hypoxanthine requiring HGPRTase for bioactivation:
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6-mercaptopurine... allopurinol could cause toxicity since the drug is a purine.
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Drug that competes w/dUMP for thymidylate synthase:
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5-fluorocuracil
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Drug used in Rx of Wilm's tumor:
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actinomycin D (dactinomycin)
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Antimetabolite that together w/an antibiotic is used in Rx of acute myelogenous leukemia:
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cytarabine + daunomycin (anthracycline antibiotic)
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Nephron site responsible for ACE inhibitors causing increase in serum creatinine:
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Block in AT II (works as vasoconstrictor of efferent arteriole in glomerulus) by ACE inhibitor removes importatnt control for maintaining intrarenal blood flow causing potential for renal failure (particularly w/bilateral renal artery stenosis)
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Nephron site of action of thiazides:
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Na/Cl pump in cortical ascending limb.
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Vitamin given in Rx of TB.
- Potential risks? |
Pyridoxine (B6)- used up when using isoniazid.
- Risk of peripheral neuropathy & sideroblastic anemia. |
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Drugs that are generally safe in pregnancy
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1) methyldopa
2) hydralazine 3) Low dose of propylthiouracil 4) cephalosporins 5) penicillin |
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Drugs that are not safe:
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1) methotrexate
2) ACE inhibitor 3) retinoic acid 4) sulfur containing drugs |
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Why is gentamicin ineffective in Legionella infections:
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- aminoglycosides affect the 30S ribosomal subunits
- resistance to any drugs that are protein synthesis inhibitors may be due to inactivation of the drug by bacterial enzymes. - decreased binding of drug to 30S ribosomal subunit. |