MED QUIZ 5 Flashcards
Diphenhydramine, Epi, Oxymetazoline, Pseudoephedrine, Terbutaline
DIPHENHYDRAMINE - AKA
BENADRYL
DIPHENHYDRAMINE - CLASS
ANTIHISTAMINE
DIPHENHYDRAMINE - MOA
blocks histamine receptors (endogenous chemical causes allergic symptoms)
DIPHENHYDRAMINE - INDICATIONS
ALLERGIC REACTION/ANAPHYLAXIS
DIPHENHYDRAMINE - CONTRAINDIATIONS
NARROW-ANGLE GLAUCOMA (EYE PRESSURE iris blocks the eye’s drainage angle, preventing fluid from draining normally)
INFANTS
DIPHENHYDRAMINE - ADVERSE REACTIONS/SE
- CNS: downiness, sedation, seizure, dizziness, headache, blurred vision, paradoxical CNS excitement in children (excitation, agitation, or insomnia instead of drowsiness)
- RESPIRATORY: wheezing, thickening of bronchial secretions
- CV: palpations, hypotension, arrhythmias
- GI/GU: dry mouth, diarrhea, N/V
DIPHENHYDRAMINE - DRUG INTERACTIONS
POTENTIATES EFFECTS OF ALC AND OTHER ANTICHOLINERGICS
DIPHENHYDRAMINE - DOSAGE ADMINISTRATION ADULT NAT
50 mg IV/IO/IM/PO
DIPHENHYDRAMINE - DOSAGE ADMINISTRATION PEDI NAT
1 mg/kg IV/IO/IM/PO
DIPHENHYDRAMINE - DOSAGE ADMINISTRATION ADULT RI
ALLERGIC REACTION (mild severity):
50 mg PO/IV/IM
ALLERGIC REACTION (moderate severity):
50 mg IV/IM
(AND IM EPI [no cardiac history] AND [ALBUTEROL +/- IPRATROPIUM] AND METHYLPREDNISOLONE IV ..OR HYDORCORTISONE IV
ALLERGIC REACTION (severe symptoms):
50 mg IV/IM
(AND [NS 500mL] AND [ALBUTEROL] AND [METHYLPREDNISOLONE IV ..OR HYDORCORTISONE IV] AND [GLUCAGON])
DIPHENHYDRAMINE - DOSAGE ADMINISTRATION PEDI RI
ALLERGIC REACTION (mild severity):
1 mg/kg PO/IV/IM (MAX 50 mg)
ALLERGIC REACTION (moderate severity):
1 mg/kg IV/IM (MAX 50 mg)
(AND IM EPI [no cardiac history] AND [ALBUTEROL +/- IPRATROPIUM] AND METHYLPREDNISOLONE IV ..OR HYDORCORTISONE IV
ALLERGIC REACTION (severe symptoms):
1 mg/kg IV/IM (MAX 50 mg)
(AND [NS 20 mL/kg bolus, MAX 60ml/kg] AND [ALBUTEROL +/- IPRATROPIUM] AND [METHYLPREDNISOLONE IV ..OR HYDORCORTISONE IV])
DIPHENHYDRAMINE - DURATION OF ACTION
onset: 15-30 min
peak: 1 hr
duration: 3-12 hrs
DIPHENHYDRAMINE - SPECIAL CONSIDERATIONSOS
- IF USED IN ANAPHYLAXIS MUST BE USED WITH EPI & CORTICOSTERIODS
- SAME DOSE USED FOR DYSTONIC REACTIONS [spasmodic or sustained involuntary contractions of muscles] TO ANTI-PSYCHOTIC DRUGS (eg. Haldol, Thorazine, Prolixin)
- Diphenhydramine helps rash and itch, steroids take time for effects to be seen
OXYMETAZOLINE - AKA
- AFRIN
- ZYCAM
OXYMETAZOLINE - CLASS
- ADRENERGIC RECEPTOR AGONIST
- DECONGESTANT
OXYMETAZOLINE - MOA
AGONIST AT ALPHA-1 AND ALPHA-2 RECEPTORS CAUSING LOCALIZED VASOCONSTRICTION OF NASAL MUCOSA VASCULATURE
OXYMETAZOLINE - INDICATIONS
EPISTAXIS (NOSE BLEEDS)
OXYMETAZOLINE - CONTRAINDICATIONS
- known hypersensitivity
- coronary artery disease
- SEVERE HYPERTENSION (Diastolic BP > 110)
OXYMETAZOLINE - ADVERSE/SE
- CNS: headache, dizziness
- CV: hypertension, arrhythmias
- OTHER: temporary burning, stinging of nasal mucosa, sneezing
OXYMETAZOLINE - DRUG INTERACTIONS
USE W/ CAUTION PTS ON MAOIs MONOAMINE OXIDASE INHIBITORS
OXYMETAZOLINE - DOSAGE ADMINISTRATION ADULT NAT
2 sprays to affected nostril