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Pediatric Terrorism and Disaster Preparedness: A ... - PHE Home

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Table 6.9. Threshold radioactive exposures <strong>and</strong> recommended prophylactic<br />

single doses of KI<br />

Predicted thyroid<br />

exposure (Gy)<br />

No. of 130-mg<br />

tablets<br />

No. of 65-mg<br />

tablets<br />

KI dose (mg)<br />

Adults<br />

>40 yr old ≥5 130 1 2<br />

Adults<br />

18–40 yr ≥0.1 130 1 2<br />

Pregnant or<br />

lactating women ≥0.05 130 1 2<br />

Adolescents 12–<br />

18 yr old ≥0.05 130 1 2<br />

Children<br />

3–12 yr old ≥0.05 >65 ½ 1<br />

Children<br />

1 mo to 3 yr old ≥0.05 32 ¼ ½<br />

Neonates<br />

birth to 1 mo old ≥0.05 16 1/8 ¼<br />

Adapted from U.S. Department of Health <strong>and</strong> Human Services, FDA, Center for Drug Evaluation <strong>and</strong><br />

Research. Potassium Iodide as a Thyroid Blocking Agent in Radiation Emergencies. Available at<br />

http://www.fda.gov/cder/guidance/4825fnl.htm.<br />

234

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