Pharm: Upper Resp Flashcards
common cold comes from what virus
rhinovirus
rhinovirus causes what
acute inflammation of the nasal mucosa
acute rhinitis
competes with histamine for receptor sites and prevents a histamine response
antihistamines (block H1 receptor sites, decreasing secretions)
1st gen antihistamine side effects
drowsiness and dry mouth
dizziness, fatigue, blurred vision, disturbed coordination, urine retention
2nd gen antihistamine side effects
less drowsiness and less anticholinergic symptoms (block acetylcholine)
name a 1st gen antihistamine
Diphenhydramine
name a 2nd gen antihistamine
fexofenadine
primary goal when using antihistamines
less inflammation of nasal cavity and less secretions
contraindications with diphenhydramine
closed-angle glaucoma, urinary retention, severe liver disease
what is the interaction that can occur on diphenhydramine??
increase CNS depression with alcohol and other CNS depressants like opiates
(stop breathing/drop BP)
what is the major concern with diphenhydramine
sedation (warn pt to avoid driving and dangerous activities)
avoid alcohol
what do we give with oral diphenhydramine to decrease GI upset?
food
what can be used to relieve dry mouth on diphenhydramine?
sugarless candy, gum, or ice chips
onset and duration of diphenhydramine (PO)
onset- 15 min
duration- 4-7hrs
dose 25mg q6h
dilation of nasal blood vessels and swelling of nasal cavity
nasal congestion
stimulate alpha-adrenergic receptors, produces nasal vasular constriction, shrinks nasal mucous membranes, and reduces nasal secretion
nasal decongestants
when to use nasal decongestants
allergic rhinitis, inflammation, infection
side effects/adverse reactions of nasal decongestants
nervous, restless (lessens w/ time)
rebound nasal congestion w/ overuse (use as ordered)
rebound nasal congestion is known as ____
rhinitis medicamentosa
interactions with nasal decongestants
caffeine (increases restlessness)
MAOIs (hypertensive crisis)
decreases effects of beta blockers
goal of nasal decongestants
less congestion
antiinflammatory, decrease rhinorrhea, sneezing, and congestion
intranasal glucocorticoids (steroids)
rhinorrhea means___
runny nose
intranasal glucocorticoids are used for ____
allergic rhinitis
example of intranasal glucocorticoid
fluticasone
steroids end in -sone
how to use an intranasal glucocorticoid
direct away from septum (causes irritation)
overuse = dryness
goal of intranasal glucocorticoids
decrease inflammation which will relieve congestion
only use an antitussive on what?
irritating, nonproductive cough
acts on the cough-control center in the medulla to suppress the cough reflex
antitussive
the 3 types of antitussive preparations
nonopioid (dextromethorphan OTC)
opioid (codine sedative effect)
combination (codine w/ guiafensin)
loosens bronchial secretions and allows elimination by coughing
expectorants
what also needs to happen when taking an expectorant?
increase fluid intake (loosen secretions)
example of an expectorant
guiafensin
side effects of expectorants
drowsiness, dizziness, HA, N and V, diarrhea
inflammation of mucous membranes of sinuses
sinusitis
inflammation of the throat
acute pharyngitis