Allergy
Diphenhydramine
Benadryl
Generic nameDiphenhydramine
Brand nameBenadryl
Medication classFirst-generation antihistamine
Typical adult example25–50 mg
FrequencyEvery 4–6 hours as needed
Common uses
Recognition cues
- Allergic symptoms
- Pruritus
EMS relevance
Assessment context
- Sedating and anticholinergic; overdose can cause delirium or dysrhythmia.