PreOp Meds: H1-Ant Diphenhyramine (Benadryl) Flashcards
1
Q
What H1 antagonist stimulates ventilation? Can this overcome narcotics?
A
- Diphenhydramine (Benadryl)
- No
2
Q
What is normal dosing of Benadryl?
A
- 25 - 50mg IV
3
Q
What is the E ½ time of diphenhydramine?
A
7-12 hours
4
Q
What salt of diphenhydramine is useful for motion sickness and why?
A
- Dimenhydrinate (dramamine) is thought to inhibit the afferent arc of the oculo-emetic reflex.
5
Q
What is diphenhydramine’s primary use and secondary uses?
A
- Antipruritic
- Pre-treatment of known allergies (IV dye)
- Anaphylaxis