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