Table 3. Threshold Thyroid Radioactive Exposures and
Recommended Doses of KI for Different Risk Groups
(FDA, 2001)
 
Predicted Thyroid exposure(cGy)
KI dose (mg)
# of 130 mg tablets
# of 65 mg tablets
Adults over 40 yrs
500
130
1
2
Adults over 18 through 40 yrs
10
Pregnant or lactating women
5
Adoles. over 12 through 18 yrs*
65
1/2
1
Children over 3 through 12 yrs
Over 1 month through 3 years
32
1/4
1/2
Birth through 1 month
16
1/8
1/4

*Adolescents approaching adult size (› 70 kg) should receive the full adult dose (130 mg).