Thionamide medications (e.g., propylthiouracil, methimazole carbimazole) | 3 d |
Multivitamins containing iodide | 7–10 d |
Natural or synthetic thyroid hormones | 10–14 d for triiodothyronine |
| 3–4 wk for thyroxine |
Kelp, agar, carrageenan, Lugol solution | 2–3 wk, depending on iodide content |
Saturated solution of potassium iodide | 2–3 wk |
Topical iodine (e.g., surgical skin preparation) | 2–3 wk |
Intravenous radiographic contrast agents |
Water soluble | 6–8 wk, assuming normal renal function |
Lipophilic | 1–6 mo |
Amiodarone | 3–6 mo or longer (100) |