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37 Cards in this Set
- Front
- Back
Are H1 blockers reversible or irreversible inhibitors of H1 histamine receptors?
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Reversible
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3 first generation H1 blockers
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Diphenhydramine, dimenhydrinate, chlorpheniramine
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3 second generation H1 blockers
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Loratadine, fexofenadine, desloratadine, cetirizine
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Clinical uses of 1st generation H1 blockers
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Allergy
Motion sickness Sleep aid |
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Clinical uses of 2nd generation H1 blockers
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Allergy
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Why are 2nd generation H1 blockers less sedating?
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Decreased entry into the CNS
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This drug blocks both H1 and H2 receptors; used for anaphylactic reactions (and as an antidepressant)
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Doxepin
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Bronchoconstriction is mediated by two things
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Inflammatory processes
Sympathetic tone |
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6 types of asthma drugs
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Beta-agonist (nonspecific and beta-2s)
Methylxanthines Muscarinic antagonists Cromolyn sodium Corticosteroids Antileukotrienes |
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Which nonspecific beta agonist is used is asthma?
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Isoproterenol
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Adverse effect of isoproterenol
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Tachycardia
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Two beta-2 agonists used in asthma
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Albuterol and salmeterol
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Which beta-2 agonist is used for acute asthma exacerbations?
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Albuterol
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Which beta-2 agonist is used as a long-acting agent for prophylaxis
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Salmeterol
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Adverse effects of salmeterol (2)
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Tremor
Arrhythmias |
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Example of a methylxanthines
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Theophylline
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Mechanism of theyphylline-induced bronchodilation?
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Inhibits phosphodiesterase --> decreases cAMP hydrolysis
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2 serious toxicitis of theophylline
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Cardiotoxicity
Neurotoxicity |
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Theophylline blocks action of?
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Adenosine (antiarrhythmic that increases K+ efflux)
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Theophylline cardiotoxicity is treated with?
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Beta blockers
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Muscarinic antagonists used in asthma
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Ipratropium
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Ipratropium is also used for
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COPD
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Mechanism of cromolyn sodium
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Prevents release of mediators from mast cells
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Is cromolyn sodium used for prophylaxis or treatment of asthma?
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Prophylaxis (not effective during an acute attack)
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1st line therapy for chronic asthma
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Corticosteroids
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2 corticosteroids used in asthma
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Beclomethasone
Prednisone |
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2 mechanisms of corticosteroids in asthma
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Inhibit synthesis of cytokines
Inactivate NF-kappa beta, the TF that induces production of TNF-alpha |
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3 antileukotrienes used in asthma
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Zileuton, zafirlukast, montelukast
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Mechanism of zileuton
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5-liposygenase pathway inhibitor (Blocks conversion of arachidonic acid to leukotrienes)
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Mechanism of zafirlukast and montelukast
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Block leukotriene receptors
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Best treatment for aspirin-induced asthma
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Zafirlukast, montelukast
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2 expectorants
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Guaifenesin
N-acetylcysteine |
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Mechanism of guaifenesin
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Removes excess sputum (doesn't suppress cough reflex)
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N-acetylcysteine has 2 clinical uses
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Expectorant/ mucolytic
Antidote for acetaminophen toxicity |
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N-acetylcysteine is used as an expectorant in which pts
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CF patients (can loosen mucous plugs)
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Bosentan is used to treat
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Pulmonary hypertension
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Mechanism of bosentan
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Competitive antagonist of endothelin-1 receptors --> decreases pulmonary vascular resistance
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