Iosat
65 mg · Tablet
- Available without prescription
- Active substance
- Potassium Iodide
- Made by
- Anbex Inc.
- Source
- Official label
Quoted from the official source. Not yet reviewed by Mediclarum — the leaflet in your pack is authoritative.
At a glance
Quoted from the official label · 2025-10-03
Thyroid blocking
- Helps prevent radioactive iodine from getting into the thyroid gland during a nuclear radiation emergency. Use along with other emergency measures recommended by public officials.
Adults over 18 years 2 tablets (whole or crushed) daily (130 mg) Children over 12 years to 18 years who weigh at least 150 pounds 2 tablets (whole or crushed) daily (130 mg) Children over 12 years to 18 years who weigh less than 150 pounds 1 tablet (whole or crushed) daily (65 mg) Children over 3 years to 12 years 1 tablet (whole or crushed) daily (65 mg) Children over 1 month to 3 years 1/2 tablet (crushed) 32.5 mg daily as directed in the consumer package insert Birth to 1 month 16.25 mg daily as directed in the consumer package insert If pregnant, breastfeeding, have a baby up to 1 month of age or have thyroid disease (except nodular thyroid disease with heart disease), take as directed above and contact a doctor as soon as possible.
do not take more than 1 dose in 24 hours tablets can be whole or crushed and mixed in milk, baby formula, water, orange juice, flat soda like cola, or raspberry syrup The liquid mixture should be given to infants, young children, and others who cannot swallow tablets; see consumer package insert on how to make a liquid mixture.
Full directions ↓If you have ever had an allergic reaction to iodine nodular thyroid disease with heart disease hypocomplementemic vasculitis dermatitis herpetiformis
All warnings ↓- Sold without a prescription
- FDA enforcement reports list no ongoing recall, and none from the last two years, for this product code · checked 2026-10-02
Every line above is selected, not written, from the official label. Nothing is reworded. DailyMed
What it is for
- Helps prevent radioactive iodine from getting into the thyroid gland during a nuclear radiation emergency. Use along with other emergency measures recommended by public officials.
- IOSAT™ (Potassium Iodide tablets, USP) is a thyroid blocking medicine that is used in a nuclear radiation emergency only.
From the official label · 2025-10-03 · DailyMed
How it works
From the US prescribing label for the same active substance (Potassium Iodide (Saturated)). It describes the substance, not this exact product.
Potassium iodide is thought to act as an expectorant by increasing respiratory tract secretions and thereby decreasing the viscosity of mucus.
Quoted from the prescribing label, sections “Mechanism of Action” and “Pharmacokinetics”. DailyMed · 2026-08-25
Do not take it if
if you have ever had an allergic reaction to iodine nodular thyroid disease with heart disease hypocomplementemic vasculitis dermatitis herpetiformis
Quoted from the official label, section “OTC — Do Not Use”.
How to take it
These directions are for this exact strength and form. Another one is different.
- use as directed by public officials in the event of a nuclear radiation emergency
- do not take more than 1 dose in 24 hours tablets can be whole or crushed and mixed in milk, baby formula, water, orange juice, flat soda like cola, or raspberry syrup The liquid mixture should be given to infants, young children, and others who cannot swallow tablets; see consumer package insert on how to make a liquid mixture.
- Age Dose
- Adults over 18 years 2 tablets (whole or crushed) daily (130 mg) Children over 12 years to 18 years who weigh at least 150 pounds 2 tablets (whole or crushed) daily (130 mg) Children over 12 years to 18 years who weigh less than 150 pounds 1 tablet (whole or crushed) daily (65 mg) Children over 3 years to 12 years 1 tablet (whole or crushed) daily (65 mg) Children over 1 month to 3 years 1/2 tablet (crushed) 32.5 mg daily as directed in the consumer package insert Birth to 1 month 16.25 mg daily as directed in the consumer package insert If pregnant, breastfeeding, have a baby up to 1 month of age or have thyroid disease (except nodular thyroid disease with heart disease), take as directed above and contact a doctor as soon as possible.
Quoted from the official label, section “Dosage & Administration”.
Stop and get help if
- you have an allergic reaction.
- Get medical help right away
- if you have trouble breathing, speaking or swallowing; shortness of breath; wheezing; swelling of the mouth, tongue or throat; or rash. irregular heartbeat or chest pain.
- Get medical help right away. swelling of the hands or feet, fever, or joint pain.
Quoted from the official label, section “OTC — Stop Use”.
Other warnings
- Allergy alert:
- Iodine may cause an allergic reaction with 1 or more of the following symptoms:
- shortness of breath or wheezing swelling skin rash trouble breathing, speaking or swallowing fever and joint pain
- Do not use
- Stop use and
- ask a doctor
- if you have an allergic reaction.
- Keep out of reach of children.
- People who are allergic to iodine, have dermatitis herpetiformis or hypocomplementemic vasculitis, or have nodular thyroid disease with heart disease should not take KI.
- Keep out of the reach of children.
- In case of an allergic reaction (difficulty breathing, speaking or swallowing; wheezing; shortness of breath or swelling of the mouth or throat), call 911 or get medical care right away.
- In case of overdose, get medical help or call a Poison Control Center right away.
- HOW POTASSIUM IODIDE WORKS Certain forms of iodine help your thyroid gland work right.
- Most people get the iodine they need from foods like iodized salt or fish.
- The thyroid can “store” or hold only a certain amount of iodine.
- In nuclear radiation emergency, radioactive iodine may be released in the air.
- This material may be breathed or swallowed.
- It may enter the thyroid gland and damage it.
- The damage would probably not show itself for years.
- Children are most likely to have thyroid damage.
- If you take KI, it will block or reduce the chances that radioactive iodine will enter your thyroid gland.
- WHO SHOULD NOT TAKE POTASSIUM IODIDE People should
- avoid KI if they are allergic to iodine, have dermatitis herpetiformis or hypocomplementemic vasculitis, or have nodular thyroid disease with heart disease, because these conditions may increase the chances of side effects to iodine.
- HOW AND WHEN TO TAKE POTASSIUM IODIDE KI should be taken as soon as possible after public officials tell you.
- If you are told to repeat the dose, you should take the second dose 24 hours after the first dose.
- Do not take it sooner.
- More KI will not help you because the thyroid can “hold” only certain amounts of iodine.
- Taking more than 1 dose per day will increase the chances of side effects.
- The public officials will tell you how many days to take KI.
- You should take KI until the chances of major exposure to radioactive iodine by breathing or swallowing stops.
- 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
Quoted from the official label, section “Warnings”.
Keep away from children
In case of overdose, get medical help or contact a Poison Control Center right away.
Quoted from the official label, section “OTC — Keep Out of Reach of Children”.
What it looks like and how it is packed
- IOSAT™ (Potassium Iodide Tablets, USP 65 mg) Packages of 20 tablets.
- Each white, round tablet, cross-scored on one side and the IOSAT name on the other, contains 65 mg potassium iodide.
- NDC 51803-002-01: 2 X 10 Unit dose, Foil Sealed, 65 mg Tablets (20 Tablets).
- IOSAT™ (Potassium Iodide Tablets, USP 65 mg) Packages of 14 tablets.
- Each white, round tablet, cross-scored on one side and the IOSAT name on the other, contains 65 mg potassium iodide.
- NDC 51803-002-02: 14 Unit dose, Foil Sealed, 65 mg Tablets (14 Tablets).
- Also available:
- IOSAT™ (Potassium Iodide Tablets, USP 130 mg) Each white, round tablet, cross-scored on one side and the IOSAT name on the other, contains 130 mg potassium iodide.
- NDC 51803-001-01: 14 Unit dose, Foil Sealed, 130 mg Tablets.
Quoted from the official label, section “How Supplied”.
How to store it
Store at 20-25°C (68-77°F). Keep dry and foil intact.
Quoted from the official label, section “Storage and Handling”.
What kind of medicine it is
Thyroid blocking
Quoted from the official label, section “OTC — Purpose”.
Other ingredients
Relevant if you react to a dye, a preservative, lactose or gluten.
magnesium stearate, microcrystalline cellulose, silica gel, sodium thiosulfate
Quoted from the official label, section “Inactive Ingredients”.
What is in it
Each white, round, cross-scored—the name IOSAT stamped on one side—tablet contains 65 mg of potassium iodide.
Quoted from the official label, section “Description”.
Questions about this product
call toll free 1-833-467-2854
Quoted from the official label, section “OTC — Questions”.
Ingredients people check for
Lactose, gluten, dyes, sugars and other ingredients that matter with an allergy, intolerance or diet — as this product’s FDA label lists them.
This label’s list of inactive ingredients names none of: lactose, wheat or gluten, colour dyes, sugars, sugar alcohols, alcohol (ethanol), aspartame (phenylalanine), gelatin, peanut oil, soy, parabens, sulfites, titanium dioxide.
Quoted from the FDA label. A label that does not name an ingredient is not a guarantee that the product is free of it, and formulations change. With an allergy, check the pack and ask a pharmacist.
Every version of this medicine (2)
The same active substance, strength and kind of form, from every company that sells it — with what each label lists.
Showing 2 of 2
Details
| Made by | Anbex Inc. |
|---|---|
| Active substance | Potassium Iodide |
| Strength | 65 mg |
| Form | Tablet |
| Route | Oral |
| Packs | 20 TABLET in 1 PACKAGE · 14 TABLET in 1 PACKAGE |
| NDC | 51803-002 |
Source: NDC Directory · 2026-09-13 · not reviewed by a clinician
Source: US Food and Drug Administration, NDC Directory. Reuse terms: US government work (FDA).
Other strengths and forms
2 products are sold under this name. Grouped by form; a number on a strength means several companies make it.
- Tablet2 products
- 65 mg
- 130 mg
Same active substance
These contain the same substance. That does not mean one can replace another — ask a pharmacist.