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Purpose: To investigate the effects of Yifukang oral liquid (YFKOL) on chemotherapy- and radiotherapy-induced myelosuppression, leucopenia and gastrointestinal tract disturbances. Methods: The effects of YFKOL on myelosuppression, leucopenia and gastrointestinal tract disturbances were assessed by cyclophosphamide- and Co60-induced leucopenia in mice, copper sulfate-induced emesis in pigeons, ethanol-induced gastric mucosal lesions in rats, gastric emptying and intestinal propulsion in mice. Results: In cyclophosphamide- and Co60-induced leucopenia assays, the mean white blood cell count (82.6 and 90.1 × 10 9 /L; 7.3 and 8.2 × 10 9 /L, respectively) and thighbone marrow granulocytes (66.1 % and 67.4 %; 60.8 and 66.5 %, respectively) were significantly (p < 0.05) increased after treatment with YFKOL (15 and 30 mL/kg), compared with the respective control (68.2 and 4.7 × 10 9 /L; 58.2 and 53.1 %). In emesis, gastric mucosal lesions, gastric emptying and intestinal propulsion assays, the mean frequency of emesis (30.8 and 22.3 times, respectively) and ulcer index (39.6 and 26.5, respectively) significantly (p < 0.05) decreased, and the mean gastric emptying (25.0 and 24.0 %) and intestinal propulsion (81.9 and 82.8 %) were significantly (p < 0.05) promoted after treatment with YFKOL (10 and 20 mL/kg), compared with the respective control (54.7 times, 62.8, 42.0 and 68.9 %). Conclusion: YFKOL may suppress chemotherapy- and radiotherapy-induced myelosuppression, leucopenia and gastrointestinal tract disturbances. Keywords: Yifukang oral liquid, Gastrointestinal tract disturbances, Leucopenia, Myelosuppression, Tumor, Chemotherapy, Radiotherapy