Chlormerodrin overdose

Poisoning from an overdose of chlormerodrin.

Poisonous Ingredient 

  • chlormerodrin (a form of mercury)

Where Found 

  • Neohydrin, Mercloran (mercurial diuretics)

Note: This list may not be all inclusive.


  • body as a whole       o thirst       o metallic taste       o less urine output       o no urine output       o salivation       o red, inflamed areas in the mouth       o shock  
  • respiratory       o extreme difficulty breathing  
  • eyes, ears, nose, and throat       o swelling within the throat that may be severe  
  • gastrointestinal       o abdominal pain       o vomiting       o diarrhea

Home Treatment 

Seek emergency medical care immediately.

The standard procedure is to induce vomiting unless the patient is unconscious or experiencing convulsions. Before inducing vomiting, contact Poison Control at 1-800-222-1222 for verification.

If instructed to induce vomiting, the standard procedure is as follows:

  • Give ipecac syrup: 15 milliliters (ml) or 1 TABLEspoonful for children and 30 ml (2 TABLEspoonsful) for an adult.  
  • Follow with 1/2 glass or 4 ounces (oz.) of water for children or 8 to 12 oz. of water for adults.  
  • Repeat 1 more time in 1/2 hour if vomiting has not occurred.

Before Calling Emergency 

Determine the following information:

  • the patient’s age, weight, and condition  
  • the name of the product (ingredients and strengths 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 
In the event of an accidental exposure, seek medical care immediately. Call Poison Control at 1-800-222-1222. 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.  
  • Use gastric lavage.  
  • Administer a cathartic (a medication used to evacuate the bowels).  
  • Give an antidote.  
  • Treat the symptoms.

Expectations (prognosis) 
The outcome depends on the amount of exposure and how long it took before proper treatment began. If the poisoning has been over a long period of time, recovery may not be complete.

Johns Hopkins patient information

Last revised: December 6, 2012
by Simon D. Mitin, M.D.

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All ArmMed Media material is provided for information only and is neither advice nor a substitute for proper medical care. Consult a qualified healthcare professional who understands your particular history for individual concerns.