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42 Cards in this Set

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What is the definition of : relationship b/w amount of drug in the body w/ serum concentration

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