PROPHYLAXIS OF DELAYED NAUSEA AND VOMITING AFTER CANCER-CHEMOTHERAPY

Objective: To compare ondansetron and domperidone for the treatment of delayed nausea/vomiting (DN/V) following highly emetogenic chemothera py, after attaining total suppression of emesis on the day of chemothe rapy by means of ondansetron (combined with dexamethasone in the case of cisplatin-treated patients). Methods: Domperidone (3 x 20 mg daily) was compared with ondansetron (3 x 8 mg daily) in a randomized double -blind placebo-controlled study. Out of 65 consecutive patients who re ceived a first course of either cyclophosphamide and cisplatin for adv anced stage ovarian cancer or cyclophosphamide, doxorubicin and 5-fluo rouracil for metastatic breast carcinoma, 60 patients were eligible fo r entering the study. According to data from the literature these chem otherapeutic regimens will induce DN/V to a comparable degree. The pat ients were questioned daily from day 2 through day 5 by the same inves tigator and the severity of nausea or vomiting was scored on a numeric al scale. Results: Emesis was totally suppressed in all patients on th e day of chemotherapy. As to DN/V, 16 out of 20 patients receiving pla cebo required ''rescue'' medication versus none in the other two group s (p < 0.001). Only 2 (10%) patients were symptomatic with domperidone versus 9 (45%) symptomatic patients in the ondansetron-treated group (p < 0.05). Conclusions: Both drugs are effective, but domperidone (3 x 20 mg) is more effective than ondansetron (3 x 8 mg) for the prevent ion of the delayed nausea and/or vomiting which occur after highly eme togenic chemotherapy (p < 0.05).