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Antihistamines,allergy,cough,cold
n/a
102
Pharmacology
Graduate
04/03/2013

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Term
Histamine (H1) effects
Definition
Vascular system: dilates small bl vessels & increase capillary permeability-warm, flush,swelling, hypotension. bronchi: constriction of smooth muscle, promote secretion of mucus.CNS: neurotransmitters modulation, cognition, memory, sleep/wake cycle, seizure suppression. Sensory:itch & pain
Term
Histamine (H2) effects
Definition
secretion of gastric acid
Term
Histamine in allergic response
Definition
mild allergies-rhinitis, itching, local edema
only a minor role in severe allergic reactions
Term
H1 antagonists-Antihistamines
classifications
Definition
first generation:highly sedating
second generation
Term
Antihistamine
MOA
Definition
selective block of H1 receptors, do not block release of histamine from mast cells/basophils. Some also bind to muscarinic recpetors
Term
Antihistamine
pharmacologic effect
Definition
Periphery:reduce flushing, swelling, itching, pain, and mucus production
CNS:Excitation (overdose) & depression (therapeutic). Anticholinergic in some
Term
Antihistamine
uses
Definition
mild allergies, seasonal allerigic rhinitis, acute urticaria, allergic conjunctivitis, mild transfusion reactions, adjunct in severe allergy, motion sickness, insomnia, reduce rhinorrhea & anticholinergic affects in colds. (not congestion)
Term
Antihistamine
side effects
Definition
(FG)sedation (impairment can occur without feeling tired), dizzy, confusion fatigue, paradoxical excitation:insomnia, nervous, tremors, convulsions. N/V/D or constipation, loss of appetite. Anticholinergic (dry mouth,nasal passage, and throat. urinary ret. constipation, palpitations, thickening of mucus), photosensitivity
Term
Major concern with phenergan
Definition
respiratory depression-can not use <2y/o
extravasation w/IV
Term
Antihistamines
drug interactions
Definition
CNS depressants, MAOI, phenytoin, anticholinergics, cholinergics
Term
Antihistamines
pregnancy/breast feeding
Definition
Unknown, some fetal malformations. Avoid in 3rd trimester.
Is excreted in breast milk
Term
Antihistamines
Acute toxicity
Definition
Dilated pupils, flushed face, hyperpyrexia, tachycardia, dry mouth, urinary retention. IN kids-hallucinations, incoordination, ataxia, convulsions, coma, CV collapse, death
Term
First generation
sedation(worst/least)
Definition
worst:benedryl, phenergan
least: chlorpheniramine
Term
Second generation
lack these side effects
Definition
sedation & anticholinergic
Term
Allegra
pt teaching
Definition
Do not drink fruit juices 4hours before, 2 hrs after administration
Term
Zyrtec
side effects
Definition
drowsiness, fatigue, dry mouth, nose and throat. More sedation than other SG but less than FG.
Term
Levocetirizine
contraindications
Definition
renal failure
Term
Claritin
side effects
Definition
drowsiness & HA
Term
Desloratadine
Definition
isomer of claritin, longer 1/2 life
Term
Classes of antihistamines
Definition
Alklamines, Ethylenediamines, Ethanolamines
Term
Antihistamines contraindications & cautions
Definition
hypersensitive, newborn/premies,nursing moms, narrow-angle glaucoma, MAOI use, lower respiratory infection (dry secrete/suppress cough), decreased mental alterness
Term
Claritin
interactions
Definition
ketoconazole, erythromycin, cimetidine
Term
Allergic Rhinitis
Definition
Inflammatory disorder affecting URT, LRT, & eyes
Term
Forms of allergic rhinitis
Definition
Seasonal/hay fever:cyclic-outdoor
perennial:chronic-indoor
Term
Allergic rhinitis
s/s
Definition
sneezing, nasal pruritus, congestion, clear rhinorrhea, itching palate, red/itchey eyes, ear pressure/popping
Term
Allergic rhinitis
patho
Definition
IgE reaction>mast cells release inflammatory mediators>histamine, leukotrienes, prostaglandins
Term
Allergic rhinitis
tx
Definition
oral antihistamines, intranasal glucocorticoids, sympathomimetics (oral/nasal)
Term
Astelin
class, use,side effect
Definition
second gen antihistamine,>12y/o 2 nasal sprays BID, Bitter taste & drowsiness
Term
Pantanase
class, use, side effect
Definition
second gen antihistamine, 2 sprays ech nare BID, nose bleeds & HA
Term
Intranasal Glucocorticoids
indications
Definition
prevent/supress:congestion, rhinorrhea, sneezing, itching, erythema
Term
Intranasal Glucocorticoids
side effects
Definition
sore throat, epistaxis, HA, dry/burn sensation, adrenal suppression, slow linear growth (least w/flonase)
Term
Intranasal Glucocorticoids
dosing
Definition
start with full dose and decrease to lowest effective, take up to one week for efficacy
Term
Intranasal cromolyn
dosing
Definition
seasonal allergies-start 2 wks before allergy season, QID schedule
Term
Nasal Decongestants
side effects
Definition
rebound congestion. Min systemic effects:CNS stimulation, CV effects, stroke, abuse
Term
Decongestants
oral vs nasal
Definition
nasal-works faster, oral-works longer
Term
Most common symptom for requested medical care
Definition
cough
Term
Classifications of cough
Definition
Acute <3wks
subacute
chronic >8wks
Term
Causes for acute cough
Definition
viral, URI, pneumonia, acute LV failure, asthma, foreign, body aspiration
Term
Causes for subacute
Definition
postinfection cough, bacterial sinusitis, asthma
Term
Causes for chronic
Definition
postnasal drip, asthma, GERD, COPD, ACE, brochogenic carcinoma, carcinomatosis, sarcoidosis, LV failure, aspiration
Term
Cough types
Definition
Productive-effective vs ineffective
Nonproductive-no purpose,virus, bacteria, GERD, CD,drugs
Term
Sympathomimetics (decongestants)
action & use
Definition
Decrease nasal congestion by activating alpha1 on nasal bl vessels
Term
Sympathomimetics (decongestants)
side effects
Definition
restless, irritable, anxiety, insomnia, widespread vasoconstriction
Term
Sympathomimetics (decongestants)
abuse
Definition
pseudoephederine & ephedrine are similar to meth, all behind counter and need ID and sign a log. Some city/states require Rx. Limits Dose limits Sudafed adults 240mg/day child >6 120mg/day
Term
How to manage/avoid rebound congestion from nasal decongestants
Definition
Do not use more than a few days (3-5). D/c one nostril at a time or use nasal glucocorticoid x1 week before withdrawl
Term
Administering Sympathomimetics (decongestants) drops
Definition
Head lateral low
dose more precise-better choice for kids
Term
Phenylephrine
kinetics
Definition
topical better-extensive 1st pass
adult max dose 60mg/day, child max 30mg/day
Term
Benefits of using combo antihistamine/sympathomimetic
Definition
relief of nasal congestion and histamine reaction
Term
Atrovent nasal spray
effects
Definition
Decreases rhinorrhea only
Term
Benefits of Singulair in allergic rhinitis
Definition
Decrease nasal congestion
Term
Cough
Definition
reflex involving CNS, PNS, & muscles of respiration started by irritation to bronchial mucosa as well as by stilmuli arising at sites distant from resp tract
Term
Antitussive
groups
Definition
opioid & nonopioid
Term
Most effective cough suppressant
Definition
Codeine antitussive
Term
Codeine antitussive
effects
Definition
decreases frequency and intensity of cough
Term
Codeine antitussive
side effects
Definition
respiratory depression, N/V, sedation, dizzy, dry mouth, confusion, rash/pruritis, constipation
Term
Codeine antitussive
cautions
Definition
Pts w/ reduced resp reserve, hypersensitivity, addiction hx, concurrent depressive meds, pregnancy C
Term
Codeine antitussive
toxicity tx
Definition
Narcan
Term
Codeine antitussive
prescriber considerations
Definition
federaly schedule V, MO schedule IV
must be combined w/2nd ingredient
Term
Codeine antitussive
MOA
Definition
Acts in brain to increase cough threshold
Term
Codeine antitussive
kinetics
Definition
Onset-quick, duration 4-6h, lethal dose 0.5-1g (keep out of children's reach)
Adult max-120mg/day Child 60mg/day
Term
Dextromethorphan (Robitussin DM)
MOA
Definition
Acts in brain to increase cough threshold, analog to codeine
Term
Dextromethorphan (Robitussin DM)
indications
Definition
Cough suppressant for nonproductive cough in cold or allergy >4y/o
Term
Dextromethorphan (Robitussin DM)
kinectics
Definition
quick onset, duration 3-6h (longer in renal pts). Adult max 120mg/day, child max 60mg. mg:mg equipotent to codeine
Term
Dextromethorphan (Robitussin DM)
side effects
Definition
Rare at therapeutic doses:drowsy, dizzy, fatigue, stomach upset, constipation, N/V. Pregnancy C
Term
Dextromethorphan (Robitussin DM)
overdose
Definition
confusion, excitation, nervous, irritable, restless, N/V, resp depression (PCP like), brain damage, seizure, loss of consciousness, irregular HR, death
Term
Dextromethorphan (Robitussin DM)
abuse potential
Definition
May precipitate psychosis and mania
must be 18 to purchase
Term
Dextromethorphan (Robitussin DM)
drug interactions
Definition
MAOIs, SSRIs, Effexor, Cymbalta, 2D6 inhibitors/inducers
Term
Dextromethorphan (Robitussin DM)
prescriber notices
Definition
Being used in adolescent parties to get high, always combined with guafinesen. Available in multiple formulations
Term
Benedryl as an antitussive
MOA
Definition
Increase cough threshold in brain. Anticholinergic activity NOT histamine
Term
Benedryl as an antitussive
indications
Definition
Supression of nonproductive cough caused by chemical or mechanical resp tract irritation, postnasal drip cough (to dry up)
Term
Benedryl as an antitussive
side effects
Definition
drowsy, blurred vision, resp depression, disturbed coordination, urinary retention, dry mouth, dry resp. secretions, paradoxical CNS stimulation. Pregnancy B
Term
Benedryl as an antitussive
interactions
Definition
CNS depressants, anticholinergics, MAOIs, cholinergics
Term
Benedryl as an antitussive
Prescriber info
Definition
Available in multi formulas, antitussive doses produce prominent sedation.Adult:25mg q4-6h,Child>6 12.5mg q6h
Term
Tessalon
chemistry
Definition
structrual analog of tertracaine (local anesthetic)
Term
Tessalon
MOA
Definition
Decreases sensitivity of respiratory tract stretch receptors
Term
Tessalon
side effects
Definition
sedation, dizzy, constipation, death in children <2. when chewed/broken-laryngospasm, bronchospasm, circulatory collapse
Term
Topical antitussives
MOA
Definition
stimulate sensory nerves causing local anesthesia and sense of improved airflow, questionable efficacy
Term
Topical antitussives
indications
Definition
soothing cough >4y/o
Term
Topical antitussive
methods
Definition
ointments(TID), lozenges (hourly), cool mist vapor (w/med TID), patch(12h)
Term
Topical antitussive
side effects
Definition
toxic when ingested, burning in mouth, N/V, epigastric distress, restless, excitation, delirium, seizures, death
4tsp camphor=child death
Term
Guaifenesin
MOA
Definition
loosens and thins lower respiratory tract secretions, promote productive cough. protussive/expectorant
Term
Guaifenesin
dosing
Definition
Adult max 2.4gm/day, child >6 max 1.2gm/day
Term
Guaifenesin
side effects
Definition
N/V/D, stomach pain, HA, drowsy, rash, dizzy
Term
Combo product labels
PM
Cough
Daytime
Allergy
AM
cold/flu
Definition
benedryl
decongestant and/or analgesic
dextromethorphan
decongestant w/o antitussive
antihistamine
decongestant(stimulant, not after 6pm)
decongestant + antihistamine
Term
Most expensive illness & transmission
Definition
colds/virus, selfinoculation and aerosol
Term
Increased susceptability to colds
Definition
smoking, poor nutrition, increased population, chronic psychological stress,sedentary lifestyle, less diverse social networks
Term
Cold/flu season
Definition
late August-early April
Term
cold/viral infection
s/s
Definition
sore throat (1st), rhinorrhea, sneezing, cough, chills, HA, malaise, myalgia, fever
Term
Viral infections
onset & duration
Definition
1-3 days after exposure, self-limiting ends once enough netralizing atb in mucosa to end viral infection ~7 days
Term
When to seek medical care for virus
Definition
Fever >101.5, chest pain, SOB, worsening/development of symptoms during tx, COPD, chronic immunosupression, frail pts/advanced age
Term
Complications of colds/virus
Definition
sinusitis, eustachian tube obstruction, middle ear effusion, bronchitis, bacterial pneumonia or other bacterial infection, asthma/COPD exacerbation
Term
Cold/viral infection
differential dx
Definition
Allergic rhinitis, asthma, Bacterial throat infection, croup, Flu, otitis media, pneumonia/bronchitis, sinusitis, pertusis
Term
Non-pharm tx colds
Definition
Increase fluids, adequate rest, nutritious diet (chicken soup), vaporizer/humidifier, saline gargle & nasal sprays, hand hygiene, lysol/kleenex
Term
Pharmacological tx colds
Definition
Decongestants, analgesia/antipyretic, antitussive, antihistamine, lozenges, gargles, anesthetics
Term
Decongestants
kinetics
Definition
MAO and COMT in GI, liver, tissues
pseudophedrine(sudafed)-dosed less frequently than phenylephrine(sudafed PE)
Term
Decongestants
contraindications/cautions
Definition
hypersensitive, MAOIs last 14 days, children, HTN, hyperthyroid, DM, CHD, breast feeding
Term
Decongestants
drug interactions
Definition
drugs that increase BP, TCAs decrease decongestion, Urinary acidifiers will increase elimination alkalizers will decrease elimination
Term
Public Health Warnings on
cough, cold, allergy meds
Definition
not to be used in children <2, most say <4. Check ingredients. Watch for max doses on acetamenophen, ibuprophen, benedryl, DXM, and other
Term
When not to self treat a cough
Definition
thick yellow/green sputum, fever >101.5, unintended wt. loss, night sweats, hemoptysis, foreign body aspiration, Hx disease assoc w/cough, drug-induced, new or worsening symptoms, cough >7days
Term
Non-pharm tx cough
Definition
WATER, cool-mist vapor, humidifier, hard candy/lozenges
Term
Mucolytics
Definition
drugs that react directly with mucus to make more watery, making cough more productive
Term
Hypertonic saline & acetylcysteine
use/side effects
Definition
inhaled mucolytic
acetylcysteine-smells like rotten eggs(sulfur)
both- bronchospasm
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