Potassium Iodide



Iosat™[OTC]; Pima®; SSKI®; ThyroSafe™[OTC]; ThyroShield™[OTC]







Potassium Iodide

(poe TASS ee um EYE oh dide)

U.S. Brand Names
Iosat™[OTC]; Pima®; SSKI®; ThyroSafe™[OTC]; ThyroShield™[OTC]
Pharmacologic Category
Antithyroid Agent; Expectorant
Reasons not to take this medicine
  • If you have an allergy to potassium iodide or any other part of this medicine.
  • Tell healthcare provider if you are allergic to any medicine. Make sure to tell about the allergy and how it affected you. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other symptoms involved.
  • If you are pregnant or may be pregnant.
What is this medicine used for?
  • This medicine is used to treat an overactive thyroid gland.
  • This medicine is used to prevent thyroid cancer from radiation exposure.
  • This medicine is used as an expectorant.
  • This medicine may be used for a variety of other uses.
How does it work?
  • This medicine decreases the release of thyroid hormone.
  • This medicine prevents the thyroid gland from absorbing radioactive iodide during exposure to radiation.
  • This medicine increases secretions in the respiratory tract and thins mucous for removal (expectorant).
How is it best taken?
  • Take this medicine with or without food. Take with food if it causes an upset stomach.
  • Liquid (solution/syrup):
  • Take with water, milk, or juice.
  • Do not use if it turns brownish-yellow.
  • Expectorant:
  • Drink plenty of noncaffeine-containing liquid unless told to drink less liquid by healthcare provider.
  • Radiation exposure:
  • Take this medicine only when directed by public health officials.
  • Take once daily until the risk of exposure to radiation ends.
What do I do if I miss a dose? (does not apply to patients in the hospital)
  • Take a missed dose as soon as possible.
  • If it is almost time for the next dose, skip the missed dose and return to your regular schedule.
  • Do not take a double dose or extra doses.
  • Do not change dose or stop medicine. Talk with healthcare provider.
What are the precautions when taking this medicine?
  • Check medicines with healthcare provider. This medicine may not mix well with other medicines.
  • If you have kidney disease, talk with healthcare provider.
  • If you have lung disease, talk with healthcare provider.
  • If you have high levels of potassium in your blood, talk with healthcare provider.
  • If you have myotonia congenital or tuberculosis, talk with healthcare provider.
  • Use birth control that you can trust to prevent pregnancy while taking this medicine and for 28 days after getting the vaccine.
  • Tell healthcare provider if you are pregnant or plan on getting pregnant.
  • Tell healthcare provider if you are breast-feeding.
What are some possible side effects of this medicine?
  • Rash.
  • Abnormal taste. This is usually reversible.
  • Nausea or vomiting. Small frequent meals, frequent mouth care, sucking hard, sugar-free candy, or chewing sugar-free gum may help.
  • Feeling tired or weak.
What should I monitor?
  • Change in condition being treated. Is it better, worse, or about the same?
  • Check blood work regularly. Talk with healthcare provider.
  • If you are taking a blood thinner, check blood work (prothrombin time/INR). Talk with healthcare provider.
  • Check baby's thyroid function if you are using this medicine and breast-feeding.
  • Take good care of your teeth. See a dentist regularly.
  • Follow up with healthcare provider.
Reasons to call healthcare provider immediately
  • If you suspect an overdose, call your local poison control center immediately or dial 911.
  • Signs of a life-threatening reaction. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; fits; or swelling of face, lips, tongue, or throat.
  • Fast heartbeat.
  • Flu-like symptoms.
  • Severe belly pain.
  • Severe nausea or vomiting.
  • Unusual bruising or bleeding.
  • Swelling.
  • Numbness or tingling of hands or feet.
  • Feeling extremely tired or weak.
  • Any rash.
  • No improvement in condition or feeling worse.
How should I store this medicine?
  • Store at room temperature.
  • Protect from moisture. Do not store in a bathroom or kitchen.
  • Protect from light.
General statements
  • If you have a life-threatening allergy, wear allergy identification at all times.
  • Do not share your medicine with others and do not take anyone else's medicine.
  • Keep all medicine out of the reach of children and pets.
  • Keep a list of all your medicines (prescription, natural products, supplements, vitamins, over-the-counter) with you. Give this list to healthcare provider (doctor, nurse, nurse practitioner, pharmacist, physician assistant).
  • Talk with healthcare provider before starting any new medicine, including over-the-counter, natural products, or vitamins.
Brand Names: