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Sodium iodide I-123: Drug information

Sodium iodide I-123: Drug information
(For additional information see "Sodium iodide I-123: Patient drug information")

For abbreviations, symbols, and age group definitions used in Lexicomp (show table)
Pharmacologic Category
  • Radiopharmaceutical
Dosing: Adult

Note: Manufacturer dosing recommendations based on 70 kg patient.

Diagnostic imaging

Diagnostic imaging: Oral:

Thyroid imaging: 0.4 mCi (14.8 MBq); alternatively, a range of 0.2 to 0.4 mCi (7.4 to 14.8 MBq) has been recommended (Ref).

Uptake studies: 0.1 mCi (3.7 MBq). Note: If uptake studies are performed in conjunction with thyroid imaging, the dose administered for imaging will suffice (Ref).

Thyroid cancer metastases

Thyroid cancer metastases (evaluation/localization) (off-label) (Ref): Oral: 0.4 to 5 mCi (14.8 to 185 MBq).

Thyroid imaging as an adjunct in parathyroid scintigraphy

Thyroid imaging as an adjunct in parathyroid scintigraphy (off-label) (Ref): Oral: 0.2 to 0.6 mCi (7.5 to 22 MBq).

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Dosing: Kidney Impairment: Adult

There are no dosage adjustments provided in the manufacturer’s labeling.

Dosing: Hepatic Impairment: Adult

There are no dosage adjustments provided in the manufacturer’s labeling.

Dosing: Older Adult

Refer to adult dosing.

Dosing: Pediatric
Thyroid imaging

Thyroid imaging (off-label; (Ref)): Children and Adolescents: Oral: 0.006 mCi/kg (0.2 MBq/kg)

Dosing range: Minimum administered activity: 0.025 mCi (0.925 MBq); Maximum administered activity: 0.4 mCi (14.8 MBq)

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Adverse Reactions

The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified. Frequency not defined.

Cardiovascular: Chest pain, tachycardia

Dermatologic: Pruritus, skin rash, urticaria

Gastrointestinal: Nausea, vomiting

Contraindications

There are no contraindications listed in the manufacturer’s labeling.

Warnings/Precautions

Special handling:

• Radiopharmaceutical: Use appropriate precautions for handling, disposal, and minimizing exposure to patients and healthcare personnel. Use under supervision of individuals with experience/training in the handling of radioactive materials approved by the applicable regulatory authority.

Concurrent drug therapy issues:

• Iodine/thyroid medications: Concomitant use of iodine, thyroid, or antithyroid medications may interfere with the uptake of radioiodide; medications should be discontinued for an appropriate time prior to dosing.

Dosage Forms: US

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Capsule, Oral:

Generic: 3.7 MBq [0.1 mCi], 7.4 MBq [0.2 mCi]

Generic Equivalent Available: US

No

Pricing: US

Capsules (Sodium Iodide I-123 Oral)

3.7 mbq (per each): $130.02

7.4 mbq (per each): $199.97

Disclaimer: A representative AWP (Average Wholesale Price) price or price range is provided as reference price only. A range is provided when more than one manufacturer's AWP price is available and uses the low and high price reported by the manufacturers to determine the range. The pricing data should be used for benchmarking purposes only, and as such should not be used alone to set or adjudicate any prices for reimbursement or purchasing functions or considered to be an exact price for a single product and/or manufacturer. Medi-Span expressly disclaims all warranties of any kind or nature, whether express or implied, and assumes no liability with respect to accuracy of price or price range data published in its solutions. In no event shall Medi-Span be liable for special, indirect, incidental, or consequential damages arising from use of price or price range data. Pricing data is updated monthly.

Administration: Adult

For oral administration. Radiopharmaceutical; use appropriate precautions for handling and disposal. Waterproof gloves should be worn at all times when handling.

Administration: Pediatric

Oral: Radiopharmaceutical; use appropriate precautions for handling and disposal. Waterproof gloves should be worn at all times when handling.

Use: Labeled Indications

Diagnostic agent: Evaluation of thyroid function and/or morphology

Use: Off-Label: Adult

Thyroid cancer metastases (evaluation/localization); Thyroid imaging as an adjunct to parathyroid scintigraphy; Visualization of retrosternal thyroid tissue

Medication Safety Issues
Other safety concerns:

Radiopharmaceutical: Use appropriate precaution for handling, disposal, and minimizing exposure to patients and healthcare personnel. Use under supervision of experienced personnel. Should be stored in original lead container or adequate radiation shield.

Reproductive Considerations

The manufacturer recommends elective studies be conducted during the first few (~10) days following menses in women of reproductive potential.

Pregnancy Considerations

Animal studies have not been conducted. All radiopharmaceuticals have the potential to cause fetal harm.

Breastfeeding Considerations

The amount of sodium iodide I123 excreted in breast milk is variable, relating to a number of factors including thyroid uptake and renal clearance of the radioiodide.

If the sodium iodide I123 product is free from radionuclide contaminants, interruption of breast-feeding may not be necessary. However, if the sodium iodide I123 product contains radionuclide contaminants, breast-feeding should be interrupted for a time ranging from 24 hours to complete cessation depending on the level of contamination (Stabin, 2000).

  1. American College of Radiology-Society for Pediatric Radiology (ACR-SPR) Practice Parameters for the Performance of Scintigraphy and Uptake Measurements for Benign and Malignant Thyroid Disease 2014a. Available at: https://www.acr.org/~/media/ACR/Documents/PGTS/guidelines/Thyroid_Scintigraphy.pdf. Last accessed August 16, 2017.
  2. American College of Radiology-Society for Pediatric Radiology (ACR-SPR) Practice Parameters for the Performance of Parathyroid Scintigraphy 2014b. Available at: https://www.acr.org/~/media/ACR/Documents/PGTS/guidelines/Parathyroid_Scintigraphy.pdf. Last accessed August 16, 2017.
  3. Becker DV, Charkes ND, Hurley JR, et al, “The Society of Nuclear Medicine Procedure Guideline for Thyroid Scintigraphy,” 1999. Available at http://interactive.snm.org/docs/pg_ch05_0403.pdf. Last accessed August 16, 2017.
  4. Silberstein EB, Alavi A, Balon HR, et al, “The Society of Nuclear Medicine Procedure Guideline for Scintigraphy for Differentiated Papillary and Follicular Thyroid Cancer,” 2006. Available at http://interactive.snm.org/docs/Scintigraphy%20for%20Differentiated%20Thyroid%20Cancer%20V3%200%20(9-25-06).pdf. Last accessed August 16, 2017.
  5. Sodium Iodide I123 capsules (prescribing information). Maryland Heights, MO: Curium US LLC; December 2018.
  6. Stabin MG and Breitz HB, "Breast Milk Excretion of Radiopharmaceuticals: Mechanisms, Findings, and Radiation Dosimetry," J Nucl Med, 2000, 41(5):863-73. [PubMed 10809203]
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