TABLE 1

Effect of KI and PTU on Radioiodide Thyroid Uptake

Group	Day 1*^†	Day 8*^†	Day 15*^†	Day 22*^†
Control	9.9 ± 0.7	12.0 ± 1.2	10.9 ± 0.5	10.8 ± 1.3
KI
1 mg/kg	4.0 ± 0.7	11.2 ± 1.8	15.2 ± 0.6	9.8 ± 1.0
2 mg/kg	2.8 ± 0.4	11.6 ± 1.1	14.7 ± 0.5	9.9 ± 1.0
PTU
3.5 mg/kg	2.9 ± 0.8	7.4 ± 1.2	11.5 ± 0.5	11.2 ± 1.6
7 mg/kg	2.8 ± 0.6	8.3 ± 1.5	10.9 ± 0.5	9.9 ± 1.1

↵* Radioiodide administered 24 h before determination of thyroid uptake.
↵^† Time after termination of administration of interfering agent.
Data are expressed as percentage radioiodide thyroid uptake (mean ± SD; n = 5 rats per group).