Diphenhydramine

Trade Name: Benadryl

Packaged: 1cc (50mg/1ml) Ampoule or Vial.
Dose: 25-50mg IV or 50mg IM max is 400mg per day
Actions: An antihistamine with anticholinergic (drying) and sedative side effects. Prevents but does not reverse histamine mediated responses, particularly on the smooth muscles of the airway, GI tract, uterus, and blood vessels.