Table 5.
Distribution of temazepam in blood and brain at different sampling time points.
| Formulation | Organ | Time Points (h) | ||||
|---|---|---|---|---|---|---|
| 0.5 h | 1 h | 2 h | 4h | 6 h | ||
| 99mTc-temazepam suspension | Blood | 0.022 ± 0.005 | 0.036 ± 0.004 | 0.032 ± 0.002 | 0.021 ± 0.001 | 0.013 ± 0.001 | 
| 99mTc-temazepam NLC-1 | Blood | 0.036 ± 0.004 | 0.050 ± 0.003 | 0.043 ± 0.005 | 0.040 ± 0.006 | 0.035 ± 0.007 | 
| 99mTc-temazepam suspension | Brain | 0.020 ± 0.007 | 0.025 ± 0.004 | 0.035 ± 0.003 | 0.019 ± 0.004 | 0.012 ± 0.004 | 
| 99mTc-temazepam NLC-1 | Brain | 0.040 ± 0.002 | 0.070 ± 0.003 | 0.053 ± 0.007 | 0.045 ± 0.005 | 0.040 ± 0.004 | 
| 99mTc-temazepam suspension | Brain/blood | 0.90 | 0.69 | 1.09 | 0.90 | 0.92 | 
| 99mTc-temazepam NLC-1 | Brain/blood | 1.11 | 1.40 | 1.23 | 1.13 | 1.14 | 
The rats were orally administered a mean of 77.5 μCi of the 99mTc-temazepam suspension or the 99mTc-temazepam NLC-1 formulation. The radioactivity was measured in percentage of the administered dose per gram. Data are expressed as mean ± S.D.