Respiratory Drugs Flashcards
Name the 1st generation H1 blockers
“-en/-ine” or “-en/-ate”
diphenhydramine, dimenhydrinate, chlorpheniramine
Uses of 1st gen H1 blockers
allergy, motion sickness, sleep aid
Toxicity of 1st gen H1 blockers
sedation, antimuscarinic, anti-alpha-adrenergic
Name the 2nd gen H1 blockers
“-adine”
loratadine, fexofenadine, desloratidine
Uses of 2nd gen H1 blockers
allergy
Toxicty of 2nd gen H1 blockers
far less sedating than 1st gen because of decreased CNS entry
Guaifenesin use
expectorant
things respiratory secretions; does NOT suppress cough reflex
N-acetylcysteine use
mucolytic - can loosen mucus plugs in CF patients by disrupting disulfide bonds
also used as antidote for acetaminophen overdose
Mechanism of of dextromethorphan
antitussive (antagonizes NMDA glutamate receptors)
synthetic codeine analog
Use of dextromethorphan
has mild opioid effect when used in excess
Toxicity of detromethorphan
naloxone can be given for overdose
mild abuse potential
may cause serotonin syndrome if combined with other serotonergic agents
Mechanism of pseudoephedrine, phenylephrine
alpha-adrenergic agonist
Use of pseudoephedrine, phenylephrine
nasal decongestant (reduce hyperemia, edema) open obstructed eustachian tubes
Toxicity of pseudoephedrine, phenylephrine
hypertension
can also cause CNS stimulation/anxiety (pseudoephedrine)
Name the pulmonary HTN drug classes
Endothelin receptor antagonists
PDE-5 inhibitors
prostacyclin analogs
Name the endothelin receptor antagonists
bosentan
Mechanism of endothelin receptor antagonists
competitively antagonize endothelin-1 receptors –> decrease pulmonary vascular resistance
Toxicity of endothelin receptor antagonists
hepatotoxic (monitor LFTs)