Potassium iodide

FDA label, Emerald Therapeutics, LLC, oral, effective 2026-08-25. Full label on DailyMed

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From MedlinePlus, U.S. National Library of Medicine

Quoted from the FDA label. Product labels differ by manufacturer and change over time; confirm against the label for the product you are using.

Dosing in kidney impairment

This label has no separate kidney-impairment dosing section. Check warnings and clinical pharmacology in the full label.

Preparation and administration

Dosage and Administration Adults– 0.3 mL (300 mg) or 0.6 mL (600 mg) diluted in one glassful of water, fruit juice or milk 3 to 4 times daily. To minimize gastric irritation, take with food or milk. This medication should be used no longer than necessary to produce the desired effect.

Drug interactions

Check potassium iodide against a medication list
Label text (1 paragraph)

Drug Interactions: Concurrent use with lithium or antithyroid drugs may potentiate the hypothyroid and goitrogenic effects of these medications. Concurrent use with potassium-containing medications, potassium-sparing diuretics and angiotensin-converting enzyme inhibitors (ACE inhibitors) may result in hyperkalemia and cardiac arrhythmias or cardiac arrest.

Contraindications

Contraindications Contraindicated in patients with a known sensitivity to iodides.

Safety data

Reported adverse events (FAERS)

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Source: FDA Adverse Event Reporting System via openFDA

Liver injury (LiverTox)

LiverTox has no chapter for potassium iodide. Check the label's hepatic warnings.

Pregnancy and lactation

Pregnancy

Pregnancy: see "Warnings" section.

Lactation

Nursing Mothers: Potassium iodide is excreted in breast milk. Use by nursing mothers may cause skin rash and thyroid suppression in the infant.

For breastfeeding, also see LactMed (National Library of Medicine), which summarizes milk levels and infant effects.

Supply and cost

Drug shortage status

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Recalls (last 24 months)

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Therapeutic equivalence (Orange Book)

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Price ladder

Not the price at the counter
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These are not what a patient pays at the pharmacy counter. They are what pharmacies, health plans, and government buyers pay, before manufacturer rebates. A patient's cost depends on their insurance (copay, coinsurance, or deductible) or the pharmacy's cash price.

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