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42 Cards in this Set
- Front
- Back
What is the definition of : relationship b/w amount of drug in the body w/ serum concentration |
Volume of distribution
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How many half lives of a drug does it take to reach 97% of its final steady state plasma concentration?
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5 half lives **
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How many half lives does it take for a drug to reach 90% of steady state concentration?
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3 half lives
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When do u use epi during resuscitiation?
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Bradycardia, pulseless arrest
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What are alternate routes of epi?
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IV, IO, IM, ETT
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Whats mechanism of action of alpha agonist?
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Sympathomomimetic agents; acitivating alpha 1, 2 inihibits adenylate cyclase which then activates cAMP and induces smooth muscle and blood vessel constriction
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Whats mechanism of action of beta agonist?
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Beta 2 receptor stimulation; leads to bronchodilation
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How does albuterol exert its primar side effect of tachycardia?
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Stimulation f cardiovascular beta receptors
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What does epi do to smooth m.?
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Relaxation of bronchial smooth muscle , cardiac stimulation; vasodilation at low doses; vasoconstriction at high doses
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What are side effects of beta agonists?
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Tacky, hyperglycemia, hypokalemia, agitation, anxiety, cardiac arrhythmias
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How long do mixed adrenergic agents lasts?
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Inhaled: 3-4 hours; IV/IO/ET: < 20 min
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What are side effects of mixed adrenergic (epi)?
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Arrhythmias, tacky, htn, anxiety, tremor, vasoconstriction, vasodilation
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What med indicated for nocturnal asthma and is an alternative but not preffered long term prevenative asthma tx?
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Theophylline
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Whats mechanism of action of theophylline?
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Inhibits 2 isoenzymes of enzyme: phosphodiesterase (PDE) resulting in increased cAMP
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What are side effects of theophylline?
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Tacky, H/A, insomnia, GER, nausea, vomiting, tremor, mental status change, sz
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What kind of lung effects does theophylline have?
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Bronchodilating; smooth ms. Relaxer; dilates pulm arteries, diuresis;
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What are signs of acute theophylline overdose?
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Over 20 mcg/mL : get nausea, vomiting, tremor, agitation; then tacky; later sz, coma, mental status changes, sz
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When do u use anticholinergic w/ lung diz
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Adjunctive for acute asthma and COPD tx
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Whats mechanism of ipratropium and tiotropium? And what’s their class?
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Anticholinergic; blocks action of Ach at parasympathetic sites in bronchial smooth m.
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Whats clinical effects of ipratropium and tiotropium ?
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Bronchodilation and drying effects of airway secretions
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What are side effects of ipratropium and tiotroprium ?
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Tacky, mydirasis, urinary retention; hyperthermia, constipation, dry mucous membranes; disorientation
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Why does ipratropium have less side effects than atropine?
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atropine are directly related to its antimuscarinic action. Dryness of the mouth, blurred vision, photophobia and tachycardia commonly; iptratropium has anticholinergic effects: relax muscles and dilate airways and very little is absorbed, travels directly to airway!!
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What kind of inflammatory effects do steroids have/ mechanism of action6?
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Suppression of cytokine generation, airway eosinophil, recruitment, inflammatory mediator release
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What are the clinical effects of steroids? +
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Resotre beta adrengergic responsiveness, block lae reaction to allergens, reduce airway hyper-responsiveness
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What are major side effects of systemic steroids?
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HPA suppression; immunospression; growth suppression; osteoporosis; cataract
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What are side effects of inhaled steroids?
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HPA suppression; immunospression; growth suppression; cataract; cushings, steroid withdrawal
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How does montelukast work? And last
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Selective LTRA (Cys T1); 24 hrs
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How does zafirulukast work? And last
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Selective LTRA of cys LT C4,D4, E4); 12 hrs
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How does zilueton work? And last
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5 lipoxygenase inhibirotr- inhibits leukotriene formation; 6-12 hrs
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Which leukotriene modifier affects liver? /hepatotoxicity?
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Zileuton and zafirlukast (z~ liver changes)
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When is appropriate therapeutic drug monitoring of theophylline when a pt is receiving a SR prep? Steady-state peak; steady state trough; steady state random; any consistent time w/in dosing interval
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any consistent time w/in dosing interval
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What are effects of loop diuretics/furosemide?
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Increases excretion of water, na, K, cl, mg, ca
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MOA of loop?
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Inhibits reabosroption of na, cl in ascending loop of henle and distal renal tubule
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Which drugs cause ototoxicity, lyte imbalance, nephrocalcinosis, renal insufficiency?
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Furosemide; ototox also due to combo w/ aminoglycoside
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Which drug inhibitis na reabsorption in distal tubules?
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Thiazide
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Which drug does everything that loop does, but also increases excretion f bicarb ?
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Thiazide
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Which drug competes w/ aldo for receptor at distal renal tubule?
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K sparing: spironolactone; increases excretion of water, na, cl
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Which drug inhibits carbonic anhydrase?
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Acetazolamide
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Which drug causes tinnitus, nephrolithiasis, renal insuff?
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Carbonic anhydrase inhib (acetazolimade)
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What do loop and thiazide diuretics do to acid base balance? And how?
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Metabolic alkalosis; depletion of k, cl, na
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Whats MOA of xolair/omalizumab?
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IgG monoclonal Ab which binds to free IgE , prevents binding to surface of mast cells, basophils, limting release of allergic mediators;
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What’s effect of omalizumab? Duration of action?
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Decreased asthma exacerbation, steroid use; duration: 2-4 wks
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