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Definition:

Chlorpromazine is a prescription medication used to treat pyschotic disorders. It may also be used for other reasons, such as preventing nausea and vomiting.

Chlorpromazine overdose occurs when someone accidentally or intentionally takes more than the normal or recommended amount of this medication.

This is for information only and not for use in the treatment or management of an actual poison exposure. If you have an exposure, you should call your local emergency number (such as 911) or the National Poison Control Center at 1-800-222-1222.



Poisonous Ingredient:

Chlorpromazine



Where Found:
  • Thorazine
  • Largactil
Note: This list may not be all-inclusive.

Symptoms:
  • Bladder and kidneys
  • Eyes, ears, nose, mouth, and throat
  • Heart and blood
    • Low blood pressure (severe)
    • Rapid, irregular heartbeat
  • Muscles, bones, and joints
    • Muscle spasms
    • Stiff muscles in neck or back
  • Nervous system
  • Reproductive system
    • Change in female menstrual pattern
  • Skin
    • Rash
  • Stomach and intestines


Home Treatment:

Seek immediate medical help. Do NOT make a person throw up unless told to do so by poison control or a health care professional.



Before Calling Emergency:

Determine the following information:

  • Patient's age, weight, and condition
  • The name of the product (ingredients and strengths, if known)
  • When it was swallowed
  • The amount swallowed
  • If the medication was prescribed for the patient


Poison Control, or a local emergency number:

The National Poison Control Center (1-800-222-1222) can be called from anywhere in the United States. This national hotline number will let you talk to experts in poisoning. They will give you further instructions.

This is a free and confidential service. All local poison control centers in the United States use this national number. You should call if you have any questions about poisoning or poison prevention. It does NOT need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.

Take the container with you to the hospital, if possible.

See: National Poison Control Center



What to expect at the emergency room:

The health care provider will measure and monitor the patient's vital signs, including temperature, pulse, breathing rate, and blood pressure. Symptoms will be treated as appropriate. The patient may receive:

  • Activated charcoal
  • Fluids by IV
  • Laxative
  • Medicine (antidote) to reverse the effect of the poison
  • Tube through the mouth into the stomach to wash out the stomach (gastric lavage )


Expectations (prognosis):

Recovery depends on the nature of the damage done by the overdose. Survival past 2 weeks is usually a good sign, with full recovery taking 4 to 8 weeks.




Review Date: 2/3/2009
Reviewed By: A.D.A.M. Editorial Team: David Zieve, MD, MHA, Greg Juhn, MTPW, David R. Eltz. Previously reviewed by Eric Perez, MD, Department of Emergency Medicine, St. Luke's-Roosevelt Hospital Center, New York, NY. Review provided by VeriMed Healthcare Network (10/29/2007).

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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