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Lugol's Side Effects

Generic name: iodine / potassium iodide

Medically reviewed by Last updated on Mar 1, 2024.

Note: This document contains side effect information about iodine / potassium iodide. Some dosage forms listed on this page may not apply to the brand name Lugol's.

Applies to iodine / potassium iodide: oral solution.

Serious side effects of Lugol's

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

All products:

Oral solution:

Other side effects of Lugol's

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if you have any side effects that bother you or do not go away.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at

More about Lugol's (iodine / potassium iodide)

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.