Allergic Rhinitis, Cough & Cold Flashcards
What is first line therapy for chronic, moderate-to-severe symptoms of allergies
Intranasal steroids
What is first line therapy for mild, intermittent symptoms of allergies
Oral antihistamines
Intranasal steroid MOA
decreases inflammation
Intranasal steroids Warnings and SE
Warnings: avoid use if recent nasal trauma, high doses for prolonged periods can cause adrenal suppression, decreased growth velocity, and immunosuppression; can increase intraocular pressure
SE: epistaxis (nose bleeds), HA, dry nose, unpleasant taste
What are OTC and Rx intranasal steroids
OTC: Budesonide, fluticasone, Triamcinolone
Rx: beclomethasone, ciclesonide, flunisolide, mometasone
What are the preferred intranasal steroids in pregnancy?
Budesonide and beclomethasone
Antihistamine effect on allergies
reduce itching, sneezing, rhinorrhea, and other types of immediate hypersensitivity reactions
Antihistamine MOA
block histamine at histamine-1 (H1) receptor site
What are first generation oral antihistamines?
Diphenhydramine, chlorpheniramine, doxylamine, clemastine, carbinoxamine
Which have more sedating side effects, first or second generation antihistamines?
First
First generation oral antihistamine CI, Warnings, SE
CI: newborn or premature infants, lactating women, acute asthma, use with MAOi
Warnings: avoid in elderly and children <2
SE: somnolence, cognitive impairment, strong anticholinergic effects and seizures/arrhythmias at high doses
What are second generation oral antihistamines?
Cetirizine (Zyrtec)
Levocetirizine (Xyzal)
Fexofenadine (Allegra)
Loratadine (Claritin)
What are the intranasal antihistamines
Azelastine
Olopatadine
Second generation oral antihistamine CI, warnings, SE
CI: levocetirizine ESRD, hemodialysis, infants and children 6 months-11 years with renal impairment
Warnings: CNS depression/sedation
SE: somnolence can be seen, HA
Which second generation oral antihistamines are preferred in pregnancy?
Cetirizine and loratadine
Which are the least sedating second generation oral antihistamines?
fexofenadine and loratadine
Decongestant MOA
alpha-adrenergic agonist that cause vasoconstriction which decreases sinus and nasal congestion
What is the maximum amount of pseudoephedrine allowed for purchace according to federal law?
3.6g/day
9g/30 days
States can make a more strict law
Phenylephrine vs oxymetazoline
Which has longer half life?
Which has more side effects?
Oxymetazoline - shorter half-life
Phenylephrine - more side effects
What 3 OTC medications are restricted and can be converted to methamphetamine?
pseudoephedrine, phenylpropanolamine, and ephedrine
What are systemic decongestants?
Phenylephrine (Sudafed PE)
Pseudoephedrine (Sudafed, Nexafed, Zephrex-D)
Oral decongestant (phenylephrine, pseudoephedrine) CI, warnings, SE
CI: Do not use within 14 days of MAOi
Warnings: Avoid in children <2 (FDA), and <4 (package labeling), use with caution in patients with CV disease and uncontrolled HTN, hyperthyroidism, diabetes, bowel obstruction, glaucoma, BPH
SE: cardiovascular stimulation, CNS stimulation, decreased appetite, dizziness, HA