Table 1. Screening of different fractions of ethanol extract of R. arboreum flowers for antihyperglycemic activity (mM/L).
| Group | Blood glucose level after different time post the treatment with different fractions at dose 200 mg/kg |
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| 0 h | 1 h | 2 h | 3 h | 4 h | 5 h | 6 h | |
| Group 1 (NC) | 4.8±0.2 | 4.7±0.4 | 4.9±0.2 | 4.6±0.4 | 4.5±0.3 | 4.5±0.4 | 4.6±0.3 |
| Group 2 ( DC) | 20.2±1.8* | 18.7±2.4* | 18.3±2.0* | 20.7±2.5* | 19.4±2.1* | 20.5±2.5* | 20.9±1.0* |
| Group 3 (DF1) | 21.0±2.3 | 20.1±1.7 | 18.9±2.2 | 17.7±1.5 | 16.8±1.6 | 17.1±1.0 | 17.9±1.1 |
| Group 4 (DF2) | 20.3±1.2 | 20.4±2.1 | 19.9±1.8 | 19.3±1.7 | 18.6±2.3 | 19.1±0.9 | 19.4±1.3 |
| Group 5 (DF3) | 20.4±2.6 | 17.8±1.8 | 16.6±1.5 | 12.9±2.0 | 11.0±1.8 | 5.4±1.1*** | 6.7±0.7** |
| Group 6 (DF4) | 20.3±1.7 | 20.3±1.6 | 19.8±1.4 | 18.7±2.2 | 17.7±1.3 | 16.0±1.5 | 16.5±1.7 |
| Group 7 (DG) | 20.9±2.1 | 18.4±2.1 | 18.0±1.8 | 16.9±1.8 | 15.9±1.7 | 13.6±1.9*** | 15.9±1.1** |
Values are given as mean±SD for six rats in each group.
*P<0.01 compared with the normal control (NC).
**P<0.001 and ***P<0.000 1 compared with diabetic control (DC).