Unit 2 Exam Flashcards
(158 cards)
Side Effects of Macrolides
QTC prolongation
LFT abnormalities
GI upset
Examples of Macrolides
Azithromycin
Clarithromycin
Caution with Macrolides
Arrhythmias or heart disease.
Hx of cholestatic jaundice or hepatic dysfunction w/ prior use.
Interactions CYP3A4 - statins use same pathway, hold statins during treatment.
Sinusitis Treatment
-Intranasal corticosteroids
-Augmentin
-Clindamycin
-Cephalosporins
-Doxycycline
-Fluoroquinolones
Sinusitis Treatment with ABX
ABX after “watchful waiting” 7 days unless severe.
First Line Treatment of Sinusitis
Amoxicillin with/without clavulanate 5-10 days
With clavulanate for high risk of infection from amox resistant organism
Sinusitis Treatment w/ Allergy to PCN
Use doxycycline or respiratory fluoroquinolone
Considerations with Augmentin Use
Do not use in pts with cephalosporin (cefazolin, ceftriaxone) allergy because of cross-sensitivity reaction with PCN and cephalosporins
Antihistamine MOA
Blocks the release of histamine from mast cells and basophils in the nasal passageways and competitively antagonize histamine at the H1 receptor.
1st Gen. Antihistamines Ex.
Benadryl
Chlorpheniramine
2nd Gen. Antihistamine Ex.
Fexofenadine (Allegra)
Loratadine (Claritin)
Cetirizine (Zyrtec)
Intranasal Antihistamines
Azelastine (Astelin)
Olopatadine (Pantanase)
Considerations of 1st Gen. Antihistamine Use
Causes drowsiness/sedation - ON BEERS LIST
Contraindicated in breastfeeding
AVOID IN NEWBORNS - SIDS
Benadryl Caution
Caution in asthma, CV disease, increased IOP, BPH, and thyroid dysfunction.
Chlorpheriniamine Caution
Caution in narrow-angle glaucoma, bladder neck obstruction, BPH.
Considerations of 2nd Gen. Antihistamine Use
Less sedating, but caution in renal and hepatic impairment.
Allegra + Claritin Adverse Effects
Somnolence
Dry mouth
Pharyngitis
Dizziness
Zyrtec Adverse Effects
GI upset
Drowsiness
Headache
Nausea
Viral infection
Astelin Adverse Effects
Bitter taste
HA
Nasal burning
Pharyngitis
Dry mouth
Fatigue
Dizziness
Patanase Adverse Effects
HA
Cough
Epistaxis
Bitter taste
Dry mouth
Overall Antihistamine Considerations
Caution in elderly - d/t confusion, constipation, dizziness, dry mouth, urinary retention, sedation (1st gen).
ON BEERS LIST
2nd gen ineffective for cough d/t colds as they may induce dryness causing worsening congestion d/t impairment of mucous flow.
Decongestants MOA
Sympathomimetic agent that stimulate alpha + beta receptors causing vasoconstriction
Decongestant Examples
Topical - Afrin and phenylephrine
Oral - Pseudoephedrine
Topical Decongestant Considerations
Don’t use more than 2-3 days due to side effect of rhinitis medicamentosa (rebound congestion).