Diphenhydramine

Question 0

Diphenhydramine Classification

Answer 0

Antihistamine
Antidyskinetic (Anticholinergic)
Sedative/hypnotic

Question 1

Other name for Diphenhydramine

Answer 1

Benadryl

Question 2

Diphenhydramine Mechanism of action

Answer 2

Competes for histamine receptor sites

CNS Depressant and Anticholinergic

Question 3

Diphenhydramine Indications

Answer 3

1. Allergic symptoms

2. Dystonic reactions or extrapyramidal symptoms

Question 4

Diphenhydramine Contraindications

Answer 4

1. Acute asthma (relative contraindication)
2. Nursing mothers
3. Glaucoma

Question 5

Diphenhydramine Side effects

Answer 5

Cardio: Tachycardia, hypotension, palpitations

Neuro: drowsiness, seizures

Respiratory: mucus plugs, wheezing

Question 6

Diphenhydramine Routes/Dosages

Answer 6

Routes: IV, IO, IM, PO
Adult dose: 25-100 mg slow IVP/IO(25 mg/min) or deep IM
Pediatric dose: 1mg/kg slow IVP/IO(25 mg/min) or deep IM