uri pharm Flashcards
bacterial
abx
H1
receptors mediate smooth muscle contraction and capillary dilation
target for traditional allergy meds
where antihistamine meds work
H2
mediate heart rate and gastric acid secretion
treat gerd
H1 blockers
antihistamines
sedating and non sedating
treat nasal allergies, seasonal, sneezing, runny nose
palliative not curative
H1 blockers moa
bind h1 receptors and block histamine release
have mild anticholinergic effect
H1 blockers CI
closed angle glaucoma, cardiac and kidney disease, htn, bronchial asthma, COPD, PUD, seizures, BPH, preg
bc high BP - not all inclusive, if bp under control, ok
diphenhydramine: indications
sedating antihistamine: 1st gen
mild allergic rxn, motion sickness, insomnia
can be given with severe anaphylactic reactions
PO or IV
all OTC?
yes
diphenhydramine: SE
drowsy, dizzy, dry mouth, urinary retention, c (DRY)
severe CNS depressants
diphenhydramine: nc
monitor closely for dizziness when ambulating, monitor for urinary retention and c
avoid driving and activities requiring mental alertness if not used to taking this drug, or take at night
children can become hyperactive
non sedating antihistamines
loratadine
fexofenadine
cetirizine
non sedating antihistamines: I
allergic rhinitis, chronic idiopathic urticaria
2nd gen antihistamines
all PO
non sedating antihistamines: SE
less SE
less drowsy and fatigue - can take in morning
sympathomimetics
decongestants
phenylphrine
pseudoephedrine
sympathomimetics: I
reduce nasal congestion, allergic rhinitis, sinusitis, common cold
sympathomimetics: moa
mimic action of SNS
activate alpha 1 adrenergic receptors, cause vasoconstriction of blood vessels, causing nasal turbinates to shrink and open nasal passages
sympathomimetics: SE
all related to CNS stim -> agitation, insomnia, anx, tachy, heart palpitations
some people cant take them
dry you out
sympathomimetics: patient education
dont use for more than 4 days bc rebound nasal congestions if drug abruptly stopped after prolonged use
taper
pseudophedrine
potential for abuse
meth
otc but pharm
more SE and effectiveness than other drug in this category
states have differing requirements of age and amount
antitussive
cough suppressants (acute or chronic)
PO, syrups/sprays/lozenges
dextromethorphan, codeine (rx), benzonatate (rx)
antitussive moa
suppress cough reflex in brain
usually cough is good but sometimes harmful (non productive dry, chest pain, no sleep, post op)
antitussive SE
CNS depressant
dont take with other cns depressants
expectorant
guaifenesin
decrease mucus in colds, bronchitis, etc
effectiveness is questionable
expectorant moa
reduce surface tension of secretion helping thin the mucus and make it easier to expectorate
encourage fluids to help with this as well
expectorants SE
few, mild GI distress
careful in pt with chronic cough/asthma
mucolytics
acetylecysteine
bronchipulmonary disease, cystic fibrosis
mucolytics moa
decrease viscosity of mucus making it easier to cough
mucolytics SE
few
bronchospasm may occur
smells terrible
monitor lung spams
given via neb or tracheostomy