Thyroid preparation overdose

Definition

Thyroid preparation overdose is poisoning from the medications used to treat thyroid gland disorders.

Poisonous Ingredient

• Levothyroxine
• Liothyronine
• Liotrix
• Thyroid

Where Found

• Levothyroxine (Synthroid, Levothroid)
• Liothyronine (Cytomel)
• Liotrix (Thyrolar, Euthroid)
• Other thyroid medication

Symptoms

• Headache
• Nervousness
• Irritability
• Chest pain
• Excessive sweating
• Changes in menstrual pattern
• Fever
• Skin flushing
• Dilated pupils
• Nausea and vomiting
• Rapid heartbeat
• Shock
• High blood pressure
• Convulsions

Home Treatment

DO NOT induce vomiting.

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

Poison Control, or a local emergency number

The NationalPoison 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 U.S. 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.

What to expect at the emergency room

The patient may be given activated charcoal and a laxative. Symptoms will be treated as needed.

Some or all of the following procedures may be performed:

• EKG
• Blood tests to check thyroid level

Expectations (prognosis)

Patients who receive quick treatment make a good recovery. Cardiac complications may lead to death. 

Symptoms are often delayed up to one week. They may be treated successfully with several medications.