Jodek Potasu Serb (Potassium Iodide)

Potassium Iodide acts on the thyroid gland to prevent uptake of radioactive iodine.

• Radiation emergency preparedness: blocks thyroid uptake of radioactive iodine during a nuclear incident.
• Nuclear power plant incidents: reduces the risk of thyroid cancer by saturating the gland with stable iodine.
• Medical countermeasure for radiological exposure: provides immediate thyroid protection when radioactive iodine is present.

• Potassium Iodide supplies a large amount of stable iodine that saturates the sodium‑iodide symporter in thyroid follicular cells. This competitive inhibition prevents the organification of radioactive iodine, thereby reducing its uptake and incorporation into thyroid hormones. By limiting radioactive iodine accumulation, the drug minimizes thyroid radiation dose and associated tissue damage.

Potassium Iodide may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Altered taste sensation
• Nausea or mild vomiting
• Stomach discomfort or cramps
• Diarrhea
• Mild headache
• Increased salivation

Serious or Rare Side Effects

• Allergic reactions such as rash, urticaria, or angioedema
• Anaphylaxis (rare but life‑threatening)
• Thyrotoxicosis in individuals with iodine sensitivity
• Severe hypotension or shock
• Acute renal impairment in susceptible patients
• Persistent hyperkalemia (rare)

Potassium Iodide should be used with caution and under professional guidance.

• Pregnancy: consult a healthcare professional before use, as iodine can affect fetal thyroid function.
• Breastfeeding: evaluate risk versus benefit for the infant.
• Iodine allergy: avoid if known hypersensitivity to iodide compounds.
• Renal impairment: monitor kidney function and adjust use as needed.
• Thyroid disorders: use only under specialist supervision.
• Store at ambient temperature: keep in original container, protect from moisture and light.

Potassium Iodide can interact with several medications; monitoring is advised.

Major Interactions (Avoid)

• Thyroid hormone replacement therapy: may reduce therapeutic effectiveness.
• Amiodarone: adds excess iodine load, increasing risk of thyroid dysfunction.
• Lithium: combined use can exacerbate thyroid abnormalities.

Moderate Interactions (Monitor Closely)

• Thiazide diuretics: may alter iodine excretion and plasma levels.
• ACE inhibitors: monitor renal function when co‑administered.
• Antacids containing aluminum hydroxide: may decrease absorption of potassium iodide.