iOsat

Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 4/4/2022
iOsat Side Effects Center

What Is iOsat?

Iosat (potassium iodide tablet) is a thyroid blocker indicated to help prevent radioactive iodine from getting into the thyroid gland during a nuclear radiation emergency. Iosat is used along with other emergency measures recommended by public officials.

What Are Side Effects of iOsat?

Common side effects of Iosat include:

  • swelling of the salivary glands,
  • nausea,
  • vomiting,
  • diarrhea,
  • stomachache,
  • fever,
  • headache,
  • metallic taste, and
  • allergic reactions (skin rashes such as hives; swelling of various parts of the body such as the face, lips, tongue, throat, hands or feet; fever with joint pain, trouble breathing, speaking or swallowing, wheezing, or shortness of breath).

Dosage for iOsat

The adult dose of Iostat is 1 tablet (whole or crushed) daily (130 mg). The pediatric dose of Iostat is based on the child's body weight. Take Iosat every day (every 24 hours) as directed by public officials. Do not take more than 1 dose in 24 hours.

What Drugs, Substances, or Supplements Interact with iOsat?

Iosat may interact with other drugs. Tell your doctor all medications and supplements you use.

iOsat During Pregnancy or Breastfeeding

Pregnant or breastfeeding women, or babies under 1 month of age, take as directed and call a doctor as soon as possible.

Additional Information

Our Iosat (potassium iodide tablet) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

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.

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iOsat Consumer Information

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Get emergency medical help if you have signs of an allergic reaction: hives, rash; fever, swollen glands, joint pain; wheezing, difficult breathing, trouble swallowing; swelling of your face, lips, tongue, or throat.

Stop using potassium iodide and call your doctor at once if you have:

  • fever, tiredness;
  • swelling in your neck or throat (enlarged thyroid, or goiter);
  • chest pain, irregular heartbeats;
  • numbness, tingling, pain, weakness, or swelling in your hands or feet;
  • a weak or heavy feeling in your legs; or
  • bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds.

High doses or long-term use of potassium iodide may cause iodine poisoning. Tell your doctor if you have symptoms such as burning in your mouth or throat, a metallic taste, tooth or gum pain, drooling, severe headache, cold symptoms (stuffy nose, sneezing) eye irritation, or severe skin rash.

Common side effects may include:

  • swelling or tenderness in your lower jaw;
  • rash; or
  • nausea, vomiting, diarrhea, upset stomach, or stomach pain.

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.

Read the entire detailed patient monograph for iOsat (Potassium Iodide)

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iOsat Professional Information

SIDE EFFECTS

Short-term use of KI at the recommended dose is safe. You should not take this drug for longer than you are told.

Possible side effects include: swelling of the salivary glands, nausea, vomiting, diarrhea, stomach ache, fever, headache, metallic taste, and allergic reactions. Allergic reaction can include

  • skin rashes such as hives
  • swelling of various parts of the body such as the face, lips, tongue, throat, hands or feet
  • fever with joint pain
  • trouble breathing, speaking or swallowing
  • wheezing or shortness of breath

Get medical attention right away if you have trouble breathing, speaking or swallowing; wheezing; shortness of breath; or swelling of the mouth, tongue or throat.

Taking iodide, in rare cases, may cause overactivity of the thyroid gland, underactivity of the thyroid gland, or enlargement of the thyroid gland (goiter). Symptoms of an overactive thyroid gland may include an irregular heartbeat and chest pain. Patients with thyroid disease are more likely to get these side effects. Babies under 1 month of age are more likely to get an underactive thyroid gland (hypothyroidism).

What To Do If Side Effects Occur

Stop taking KI and call a doctor if you have one of the following symptoms:

  • swelling of the face, hands or feet
  • fever and joint pain
  • skin rash

Stop taking KI and get medical help right away if you have one or more of the following symptoms :

  • trouble breathing, speaking or swallowing
  • shortness of breath or wheezing
  • swelling of the lips, tongue or throat
  • irregular heart beat or chest pain

Read the entire FDA prescribing information for iOsat (Potassium Iodide)

© iOsat Patient Information is supplied by Cerner Multum, Inc. and iOsat Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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