Medically reviewed on December 4, 2017
What is ThyroShield?
ThyroShield is the potassium salt form of iodide, a naturally occurring substance.
ThyroShield can be used as an expectorant to thin mucus and loosen congestion in your chest and throat.
ThyroShield may also be used for purposes not listed in this medication guide.
ThyroShield is used to thin mucus and loosen congestion in people with chronic breathing problems that can be complicated by thick mucus in the respiratory tract.
ThyroShield can cause thyroid problems, high potassium levels in your blood, or iodide poisoning. Call your doctor at once if you have swelling in your neck or throat, chest pain, irregular heart rate, muscle weakness, tingly feeling, pain or burning in your mouth, severe headache, or eye irritation.
Before taking this medicine
You should not use this medication if you have a history of previous allergic reaction to iodide, iodine, or other medicines.
To make sure ThyroShield is safe for you, tell your doctor if you have:
high levels of potassium (hyperkalemia) in your blood;
Addison's disease (an adrenal gland disorder);
a thyroid disorder;
heart disease; or
a genetic muscle disorder.
Potassium iodide can pass into breast milk and may harm a nursing baby. You should not breast-feed while using ThyroShield.
How should I take ThyroShield?
ThyroShield is usually taken 3 to 4 times per day. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Measure liquid medicine with the special dose-measuring dropper provided with your medication. If you do not have a dose-measuring device, ask your pharmacist for one.
Mix this medicine with a full glass of milk, water, or fruit juice.
Take with food or milk to avoid an upset stomach.
Use this medicine for only as long as needed to get the best results. Your doctor can determine how long to treat you with ThyroShield.
This medication can cause unusual results with certain medical tests. Tell any doctor who treats you that you are using ThyroShield.
Store at room temperature away from moisture, heat, and light. Keep the bottle tightly closed when not in use. Avoid storing the medicine in very cold temperatures. If the medicine changes color to brown or yellow, throw it away and call your pharmacist for new medicine.
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking ThyroShield?
Follow your doctor's instructions about any restrictions on food, beverages, or activity.
ThyroShield side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives, itching, severe tingling; fever, swollen glands, joint pain; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using ThyroShield and call your doctor at once if you have:
swelling in your neck or throat (enlarged thyroid);
chest pain, rapid or irregular heart rate, feeling anxious or irritable;
severe headache, metallic taste in your mouth;
pain or burning in your mouth or throat, increased salivation;
high potassium (slow heart rate, weak pulse, muscle weakness, tingly feeling).
Common side effects may include:
swollen glands in your lower jaw;
confusion, tired feeling, numbness;
mild skin rash; or
weakness or heavy feeling in your hands or feet.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect ThyroShield?
Tell your doctor about all medicines you use, and those you start or stop using during your treatment with ThyroShield, especially:
multivitamin or mineral supplements that contain potassium.
This list is not complete. Other drugs may interact with potassium iodide, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2018 Cerner Multum, Inc. Version: 2.02.
More about ThyroShield (potassium iodide)
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- Dosage Information
- Drug Interactions
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- En Español
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- Drug class: antithyroid agents