Potassium Iodide
General Drug Information and Indications
Treatment of cutaneous/subcutaneous fungal infections (sporotrichosis, pythiosis) and iodine deficiency; expectorant.
Iodide salt (potassium iodide). Mechanism: at pharmacological doses, high iodide concentrations inhibit thyroid hormone synthesis (Wolff-Chaikoff effect); also accumulates in hypersecretory tissues (sporotrichosis/pythiosis) with direct fungicidal effect via iodine release. Expectorant: iodide stimulates increased respiratory tract secretion. Oral administration.
Key information
IV potassium: NEVER give undiluted IV bolus — fatal cardiac arrest. Maximum IV rate 0.5 mEq/kg/hr. Monitor ECG during IV administration. Oral supplementation is safer route.
How to Give this Medication
Oral (SSKI): dilute in water or juice to reduce GI irritation; administer with food. Mix into grain for horses. Administer at consistent times daily. Store at room temperature; protect from light. Protect from light.
If a dose is missed
Administer as soon as you remember. If it is almost time for the next scheduled dose, skip the missed dose and resume the normal schedule. Never double up doses to make up for a missed one.
Side Effects
GI: vomiting, anorexia, diarrhea (common with oral use). Iodism (excessive iodide): salivation, nasal discharge, skin eruptions, thyroid suppression. Thyroid dysfunction. Cats: more sensitive to iodide toxicity (skin lesions, anorexia, hypothermia).
Precautions
For animals
Monitor thyroid function with prolonged use. Cats: more sensitive to iodide toxicity — monitor closely for anorexia, skin lesions, and hypothyroidism. Avoid in patients with hyperthyroidism unless as part of pre-surgical preparation.
For people handling this medication
Wash hands thoroughly with soap and water after handling. Avoid contact with eyes; if contact occurs, flush with water for 15 minutes and seek medical attention. Keep out of reach of children. If accidental ingestion occurs, contact Poison Control (1-800-222-1222). Iodide salt — Wash hands thoroughly with soap and water after handling. after handling. Can affect thyroid function with human exposure. Keep out of reach of children.
Overdose
Contact your veterinarian. Potassium iodide overdose causes iodism: excessive salivation, nasal discharge, skin changes, and GI signs.
Potassium Iodide dosage forms
| Product | Strength | Form | Size | Type |
|---|---|---|---|---|
| POTASSIUM IODIDE 1 GM/SCOOP POWDER | 1 GM/SCOOP | Powder | 1 | Compound |
| POTASSIUM IODIDE 10 GM/SCOOP | 10 GM/SCOOP | — | — | Compound |
Sources
This information is provided for educational purposes and is not a substitute for advice from your veterinarian. Source: Merck Veterinary Manual (merckvetmanual.com); Plumb's Veterinary Drug Handbook (Plumb, D.C., app.plumbs.com)