LR Drugs Flashcards
Mimic action of epinephrine and norepinephrine
Selectively activates alpha 1
Used as
Common alpha 1 adrenergic agonist effects:
Alpha 1-adrenergic agonists (sympathomimetic) - UR
Causes smooth muscle and vessel constriction
Selectively activates alpha 1
Decongestant – shrinks mucous membranes, decreases mucous production in upper respiratory tract
Example: pseudoephedrine
Used as
CNS stimulation (insomnia, nervousness, dizziness), urinary retention, hypertension, tachycardia
Common alpha 1 adrenergic agonist effects:
Goal is to achieve bronchodilation; cannot do perfectly when act as agonist of SNS - see AE
Mimic effects of sympathetic nervous system – specifically trying to target the beta2 receptors of sympathetic NS
Act on beta receptors
Beta agonists that activate both B receptors are nonselective bronchodilators
Beta agonist that activate only B2 are selective bronchodilators
Common beta agonist effects:
Beta2-adrenergic agonists (sympathomimetic)
Dilation of bronchi with increased rate and depth of respiration
Mimic effects of sympathetic nervous system – specifically trying to target the beta2 receptors of sympathetic NS
Example: epinephrine activates all a and b
Beta agonists that activate both B receptors are nonselective bronchodilators
Example: albuterol
Beta agonist that activate only B2 are selective bronchodilators
Relax bronchi, hypertension, tachycardia, tremors, anxiety, headaches
Common beta agonist effects:
Blocks parasym NS in terms resp is get bronchodilation; norm action of PSNS is bronchoconstriction - use resp anticholinergics for bronchodilation
Substance that blocks neurotransmitter acetylcholine (Ach) (cholinergic) in CNS and PNS
Used as alternative to beta-agonists in asthma therapy (inhaled form)
Common anticholinergic effects:
Anticholinergics
Affect vagus nerve to relax bronchial smooth muscle and promote bronchodilation
Substance that blocks neurotransmitter acetylcholine (Ach) (cholinergic) in CNS and PNS
Example: Ipratropium (Atrovent)
Used as alternative to beta-agonists in asthma therapy (inhaled form)
Relax bronchi, drowsiness, confusion, tachycardia, hypertension, dry mouth, pupil dilation, flushing, urinary retention, constipation
Common anticholinergic effects:
Drugs that are acting to mimic SNS/drugs that blocking parasympathetic NS - end up in the same spot; get bronchodilation and see some same effects
Use these drugs have have specific conditions that contraindicated in because drug effects
Sympathetic activity: - diseases/disorders which meds act as sympathomimetics use drugs with caution - be very careful in pats that have these disorders that mimic SNS:
Anticholinergic effects:
Med caution: conditions exacerbated by:
Glaucoma
Hypertension
Coronary artery disease
Peripheral artery disease
Diabetes
Hyperthyroidism
Prostate hypertrophy
Sympathetic activity: - diseases/disorders which meds act as sympathomimetics use drugs with caution - be very careful in pats that have these disorders that mimic SNS:
Increase BP more; not want to happen: not want issue worse
Hypertension
Potential to increase BG and diabetics don’t need that
Diabetes
Increased sweating, increased HR - potential arythmias
Hyperthyroidism
Exacerbating prob
Prostate hypertrophy
Blocking parasymp NS
Constipation
Prostate hypertrophy
Hypertension
Tachycardias
Dementia
Anticholinergic effects:
slower digestion - not get activated
Exacerbating prob
Constipation
Exacerbating prob
Prostate hypertrophy
Common disorders:
Clinical manifestations:
LR disorders and CM
Asthma (trigger)
COPD
Infections/diseases (pneumonia)
Common disorders:
Inflammatory disorder - trigger: pet dander, exercise, allergens
Results in Bronchoconstriction and Inflammation
Mucous production
Asthma (trigger)
Chronic cough, mucous production
Emphysema: have Expiratory airway collapse w/air trapping
Chronic bronchitis: with chronic inflammation
COPD
Shortness of breath/dyspnea
Increased work of breathing and use of accessory muscles
Sputum production
Hypoxia
Clinical manifestations:
Prior to admin:
After administration:
Nursing assessment
Baseline assessment of all systems - first step of nursing process always assessment; always want do baseline head to toe
Focus assessments:
Prior to admin:
Be priority assessment and bare minimum in assessing pats before give meds; key in on and prioritize if going give med that treats LR prob; 2 big assessments do; do together if can
Respiratory: lung sounds, sputum production, RR, O2 saturation
Cardiac: HR&R, peripheral perfusion, presence of cyanosis - impacts CV with LR drugs
Assessments do for baseline
Focus assessments:
meds in rescue capacity - always reassess to eval if med effective/still not - suffering AE that are problematic and what extent
Therapeutic effects: absence of acute respiratory distress, decreased symptoms, relief of respiratory distress, increased O2 sat
Adverse effects: see meds
After administration:
Divided into short- and long-acting classifications
Short-acting beta agonist (SABA) “rescue inhaler” - rescue drug
Inhalers targeting beta2 receptors of adrenergic sys - SNS - giving meds trying target receptors to achieve bronchodilation
2 subclasses of beta2-adrenergic agonists: short and long-acting (sig difference)
Long-acting beta2 agonist (LABA) “maintenance inhaler”
Sympathomimetics: beta2-adrenergic agonists
Albuterol (ProAir)
2 subclasses of beta2-adrenergic agonists: short and long-acting (sig difference)
Short-acting
Indications: Acute tx of bronchospasm
PRN; sometimes scheduled if have pneumonia
Only one can use for rescue
Onset quick
Shorter duration - not for maintenance; scheduling is shorter
Albuterol (ProAir)
Salmeterol
Long-acting beta2 agonist (LABA) “maintenance inhaler”
Indications: prevention of bronchospasm
Everyday bid to help maintain bronchodilation and prevent asthma attacks and try to keep airways open and prevent exacerbations of COPD
Salmeterol
Sympathomimetic
MOA:
Indications:
Route:
Contraindications:
Drug-drug:
Adverse Effects:
Nursing:
Beta2-adrenergic agonists (SABA) prototype: albuterol
Beta2 selective adrenergic agonist - acts to selectively target beta2 receptors to achieve bronchodilation in someone having resp prob
MOA: (Beta2-adrenergic agonists (SABA) prototype: albuterol)