Iodure De Potassium Serb (Potassium Iodide)

Potassium Iodide acts on thyroid iodine uptake and is indicated for the following situations:

• Prophylaxis against radioactive iodine exposure: reduces thyroid uptake of radioactive iodine during nuclear incidents.
• Thyroid protection in nuclear emergencies: saturates the gland to limit radiation‑induced damage.
• Iodine deficiency supplementation (off‑label): provides supplemental iodide to support normal thyroid hormone synthesis.

• Potassium Iodide supplies stable iodide ions that are rapidly taken up by the thyroid gland, leading to temporary saturation of the organ’s iodine pool (Wolff‑Chaikoff effect). This saturation blocks the incorporation of radioactive iodine, thereby decreasing thyroid radiation dose and preserving glandular function.

Potassium Iodide may cause a range of adverse reactions, which are grouped by frequency.

Common Side Effects

• Nausea: mild stomach upset after ingestion.
• Metallic taste: transient alteration of taste perception.
• Headache: occasional mild headache.
• Mild rash: skin irritation in some individuals.
• Fatigue: temporary feeling of tiredness.
• Gastrointestinal discomfort: mild abdominal cramping.

Serious or Rare Side Effects

• Hypersensitivity reaction: hives, swelling, or anaphylaxis.
• Thyroid dysfunction: unexpected hypo‑ or hyperthyroidism.
• Severe skin reactions: Stevens‑Johnson syndrome or toxic epidermal necrolysis.

When considering Potassium Iodide, several safety measures should be observed:

• Pregnancy: consult a healthcare provider before use.
• Breastfeeding: evaluate potential risks to the infant.
• Renal impairment: monitor kidney function and adjust use if needed.
• Known iodine allergy: avoid administration.
• Pre‑existing thyroid disease: use under specialist supervision.
• Store at room temperature: keep in the original pack, protect from moisture.

Potassium Iodide can affect the activity of other medicines; interactions are classified as follows:

Major Interactions (Avoid)

• Thyroid hormone replacement therapy: may interfere with dosing.
• Antithyroid drugs (e.g., propylthiouracil, methimazole): antagonistic effect on iodine uptake.
• Lithium: can exacerbate thyroid function changes.

Moderate Interactions (Monitor Closely)

• Amiodarone: additive iodine load may affect thyroid.
• ACE inhibitors: monitor serum potassium levels.
• Thiazide diuretics: observe for potassium imbalance.