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Promethazine overdose

Alternative names

Poisoning from an overdose of Phenergan.

Poisonous Ingredient


Where Found

  • Phenergan
  • Promethegan
  • Anergan
  • Fargan
  • Promahist
  • V-Gan
Note: This list may not be all inclusive.


  • Body as a whole
    • Unsteadiness
    • Tremor
    • Convulsions
    • Fever
    • Flushed skin
    • Muscle stiffness in face and/or neck
  • Heart and blood vessels
    • Rapid heartbeat
  • Nervous system
    • Depression
    • Excitation
    • Drowsiness
    • Nervousness
    • Hallucinations
    • Disorientation
    • Delirium
    • Coma

Home Treatment

Contact Poison Control for instructions.

Before Calling Emergency

Determine the following information:
  • The patient's age, weight, and condition
  • Name of product (as well as the ingredients and strength if known)
  • The time it was swallowed
  • The amount swallowed
  • If the medication was prescribed for the patient

Poison Control, or a local emergency number

They will instruct you if it is necessary to take the patient to the hospital. See Poison Control centers for telephone numbers and addresses. Take the container with you to the emergency room.

What to expect at the emergency room

Some or all of the following procedures may be performed:
  • Administer activated charcoal.
  • Administer a laxative.
  • Use gastric lavage .
  • Treat the symptoms.

Expectations (prognosis)

If the patient survives the first 24 hours, recovery is likely. Few patients actually die from an antihistamine overdose.

Update Date: 8/6/2003

Ari Schwell, M.D., Director, Emergency Department of the Episcopal Campus of Temple University Hospital, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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Last updated: Tue, 06 Jan 2009 00:20:03 GMT