This article discusses poisoning from mercury.
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 a local poison control center at 1-800-222-1222.
There are three different forms of mercury that cause health problems.
Elemental mercury can be found in:
Inorganic mercury can found in:
Organic mercury can be found in:
Note: This list may not be all-inclusive.
Elemental mercury is usually harmless if touched or swallowed. It is so thick and slippery that it usually falls off your skin or out of your stomach without being absorbed.
Considerable damage can occur, however, if mercury is made airborne into small droplets and breathed into the lungs. This can often occur by mistake when people try to vacuum up mercury that has spilled onto the ground.
Breathing in elemental mercury will cause symptoms right away (acute) if enough mercury is breathed in. Symptoms will also occur over time (chronic) if little amounts are inhaled every day. If this occurs, symptoms may include:
Depending on how much mercury is inhaled, permanent lung damage and death may occur. You may also have some long-term brain damage from inhaled elemental mercury.
Unlike elemental mercury, inorganic mercury is usually poisonous when swallowed. Depending on the how much is swallowed, symptoms may include:
If inorganic mercury enters your bloodstream, it can attack the kidneys and brain. Permanent kidney damage and failure may occur. A large overdose may cause massive blood and fluid loss from diarrhea and kidney failure, leading to death.
Organic mercury can cause sickness if breathed in, eaten, or placed on the skin for long periods of time. Usually organic mercury causes problems over years or decades, not immediately. In other words, being exposed to small amounts of organic mercury every day for years will likely cause symptoms to appear later. Regardless, a single large exposure can also cause problems.
Long-term exposure will likely cause neurological symptoms, including:
Medical evidence suggests that being exposed to large amounts of the organic mercury called methylmercury while pregnant can permanently damage the baby's developing brain. Most doctors will recommend eating less fish, especially swordfish, while pregnant. These recommendations are made to be extremely cautious. Small exposures are unlikely to cause any problems. Women should talk to their doctor about what they should and should not eat while pregnant.
Determine the following information:
However, DO NOT delay calling for help if this information is not immediately available.
In the United States, call 1-800-222-1222 to speak with a local poison control center. This hotline number will let you talk to experts in poisoning. They will give you further instructions.
This is a free and confidential service. 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.
The health care provider will measure and monitor the patient's vital signs, including temperature, pulse, breathing rate, and blood pressure.
Inhaled elemental mercury poisoning may be difficult to treat. The patient may receive:
For inorganic mercury poisoning, treatment usually begins with supportive care. The patient may receive:
Treatment of organic mercury usually consists of medicines called chelators to remove mercury from the blood and away from the brain and kidneys. Often, these medications will have to be used for weeks to months.
Breathing in a small amount of elemental mercury will cause very few, if any, long-term side effects. However, larger amounts will lead to a long hospital stay. Permanent lung damage is likely. There may be some brain damage. Very large exposures will likely cause death.
A large overdose of inorganic mercury may cause massive blood and fluid loss, kidney failure, and likely death.
Chronic brain damage from organic mercury is difficult to treat. Although some people never recover, some success has been seen in patients treated with chelation.
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Bird TD. Dementia. In: Fauci AS, Harrison TR, eds. Harrison's Principles of Internal Medicine. 17th ed. New York, NY: McGraw Hill; 2008:chap 365.
Baum CR. Mercury: Heavy metals and inorganic agents. In: Shannon MW, Borron SW, Burns MJ, eds. Haddad and Winchester's Clinical Management of Poisoning and Drug Overdose. 4th ed. Philadelphia, PA: Saunders Elsevier; 2007:chap 71.
Velez LI, O'Connell EJ. Heavy Metals. In: Marx JA, Hockberger RS, Walls RM, et al., eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 8th ed. Philadelphia, PA: Elsevier Mosby; 2013:chap 157.
Updated by: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.
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