Respiratory Flashcards
Albuterol Pirbuterol Terbutaline Metaproterenol Description
Short acting beta 2 agonists
Albuterol, Pirbuterol, Terbutaline, Metaproterenol
Mechanism
Increase in cAMP ->relaxation of bronchial smooth muscle and subsequent bronchodilation
Inhalation minimizes side effects (poor absorption through the lungs)
Albuterol, Pirbuterol, Terbutaline, Metaproterenol
Indication
DOC for acute relief of bronchospasm
Adrenergic agonist drugs
Albuterol, Pirbuterol, Terbutaline, Metaproterenol
Salmeterol, Formoterol
Epinhephrine
Isoproterenol
Adrenergic agonist adverse
Tremor
Tachycardia
Arrhythmia
Tolerance with excessive use
Salmeterol and Formoterol description
Long acting beta 2 agonists
Salmeterol and Formoterol indication
LABA used mainly for prophylaxis
Salmeterol and Formoterol mechanism
Increase in cAMP -> relaxation of bronchial smooth muscle and subsequent bronchodilation
Inhalation minimizes side effects (poor absorption through lungs)
Epinephrine mechanism
Increase in cAMP -> relaxation of bronchial smooth muscle and subsequent bronchodilation
Inhalation minimizes side effects (poor absorption through lungs)
Isoproterenol mechanism
Increase in cAMP -> relaxation of bronchial smooth muscle and subsequent bronchodilation
Epinephrine description
Non specific beta agonist
Epinephrine indication
Asthma with anaphylactic shock or other specifric drugs have failed
Isoproterenol description
Non specific beta agonist
Not available via inhalation
Isoproterenol indication
Bronchodiolation via beta 2
Primary use: heart block and bradycardia (beta 1)
Theophylline class
methylxanthine derivative
bronchodilator
Theophylline description
PDE inhibitor
Also blocks adenosine receptors
Theophylline mechanism
Blocks the metabolism of cAMP resulting in bronchodilation
Theophylline indication
Limited role due to small TI
Metabolized by CYP -> inducers decrease effect, inhibitors increase effect
Theophylline adverse
Seizure and arrhythmia
Tremor, insomnia and GI issues
Hypokalemia
Hyperglycemia
Ipratropium class
muscarinic antagonist
bronchodilator
Ipratropium description/mechanism
inhaled
block PS -> decrease bronchoconstriction and mucus secretion
Ipratropium indication
drug induced bronchospasm
Tx of asthma and COPD
Ipratropium adverse
Dry mouth and sedation (poor adsorption)
Tiotropium class
muscarinic antagonist
bronchodilator
Tiotropium description/mechanism
long acting
Block PS -> decrease bronchoconstriction and mucus secretion
Anti inflammatories for respiratory (classes)
Corticosteroids
Leukotriene antagonists
Antibody
Mast cell stabilizers
Cromolyn and Nedocromil
Cromolyn and Nedocromil description
Mast cell stabilizers
Oral, aerosol and droplets
Also used for food allergies and hay fever and rhinitis
Cromolyn and Nedocromil mechanism
Mast cell stabilizers
Prevent release of inflammatory mediators from mast cells
Cromolyn and Nedocromil indication
Prophylaxis: allergen and exercise induced bronchoconstriction
NOT for acute attacks
Cromolyn and Nedocromil adverse
Cromolyn: laryngeal edema, cough, wheezing
Nedocromil: unpleasant taste
Beclomethasone, Flunisolide, Fluticasone, Budesonide
Description
Inhaled steroids used in the treatment of chronic asthma
Beclomethasone, Flunisolide, Fluticasone, Budesonide
Mechanism
Inhibit PLA2 -> decrease AA -> decreased synthesis of cytokines, prostaglandins and other inflammatory mediators
Bind to glucose response elements (GRES) -> decrease inflammation
Beclomethasone, Flunisoloide, Fluticasone, Budesonide
Indication
Maintenance: inhalation steroids are used to suppress inflammation and reduce risk of exacerbation
Acute exacerbation: systemic steroids for severe attacks (status asthmaticus)
Can also treat chronic rhinitis (beclomethasone and flunisolide) -> improvement not seen for two weeks
Dexamethason, Prednisolone, Hydrocortisone indication
Maintenance: inhalation steroids are used to suppress inflammation and reduce risk of exacerbation
Acute exacerbation: systemic steroids for severe attacks (status asthmaticus)
Dexamethasone, Prednisolone, Hydrocortisone Mechanism
Inhibit PLA2 -> decrease AA -> decreased synthesis of cytokines, prostaglandins and other inflammatory mediators
Bind to glucose response elements (GRES) -> decrease inflammation
Dexamethasone, Prednisolone, Hydrocortisone description
IV steroids
Dexamethasone, Prednisolone, Hydrocortison Adverse
Abnormal glucose metabolism
Increase appetite and weight gain
HTN
Adrenal suppression
Beclomethasone, Flunisolide, Fluticasone, Budesonide adverse
Cough
Oral Thrush
Dysphonia
Zileuton description
inhibits 5-lipoxygenase
Zileuton mechanism
PO administration -> block synthesis of LT’s or block LT receptors -> decrease constrictionand inflammation
Zileuton indication
Exercise, Ag, or aspirin induced asthma
Chronic maintenance
NOT useful for acute bronchospasm
Zileuton adverse
overall safe
But
can increase LFT’s
Zafirlukast and Montelukast description
LTD4 receptor antagonists
Zafirlukast and Montelukast Mechanism
PO administration -> block synthesis of LT’s or block LT receptors -> decrease constriction and inflammations
Zafirlukast and Montelukast indication
Exercise, Ag, or aspirin induced asthma
Chronic maintenance
NOT useful for acute bronchospasm
Zafirlukast and Montelukast adverse
Vasculitis with EOS (rare, similar to Churg Strauss)
Omalizumab (antibody) description
expensive, parenteral
Omalizumab (antibody) mechanism
Binds IgE on sensitized mast cells preventing release of mediators
Omalizumab (antibody) indication
Prophylaxis when ICS are inadequate (over age 12)
Omalizumab adverse
anaphylaxis
Cough and rhinitis drug classes
Opioids
Mucolytic agent
H1 antagonist
Alpha agonists
Codeine and Dextromethorphan description
Cough medications aka:
Antitussives
Dextromethorphan -> synthetic
Codeine and Dextromethorphan mechanism
Depress CNS cough center sensitivity to peripheral stimuli (low dose)
Codeine and Dextromethorphan indication
Severe cough that disrupts sleep
Codeine and Dextromethorphan adverse
Dextromethorphan has no analgesic or addictive potential, less constipating
N-acetylcysteine (NAC) mechanism
mucolytic agent
Breaks disulfide bonds in mucus making it easier to cough out
N-acetylcysteine (NAC) indication
Cystic fibrosis*
Acetaminophen overdose*
Diphenhydramine and Chlorpheniramine description
First generation H1 antagonist -> crosses BBB and cause drowsiness
Diphenhydramine and Chlorpheniramine mechanism
Block histamine release
Diphenhydramine and Chlorpheniramine indication
allergic rhinitis
Loratadine, Fexofenadine, Cetirizine description
second generation H1 antagonist -> non drowsy
Loratadine, Fexofenadine, Cetirizine mechanism
blocks release of histamine
Loratadine, Fexofenadine, Cetirizine indication
allergic rhinitis
Phenylephrine and Pseudoephedrine description
alpha agonists
Constrict dilated arterioles in the nasal mucose
Aerosol -> rapid onset and few systemic effects
Phenylephrine and Pseudoephedrine indication
Rhinitis
Phenylephrine and Pseudoephedrine adverse
Prolonged use can lead to rebound nasal congestion after discontinuation