Despite the availability of effective antiemetics, control of acute and delayed chemotherapy-induced nausea and vomiting (CINV) is often suboptimal and there is need of an inexpensive and safer alternative. Thus, this study was designed to evaluate the effect of Emblica officinalis Gaertn (Euphorbiaceae) fruit extract (EEEO) on cisplatin-induced delayed gastric emptying in Sprague-Dawley rats so that Emblica officinalis can be clarified for its application in CINV as a potential candidate. Groups I, II, III, IV, and V rats were pretreated orally with 1% carboxymethyl cellulose (CMC, 1 mL/kg), 1% CMC (1 mL/kg), EEEO (250 mg/kg), EEEO (500 mg/kg), and ondansetron (3 mg/kg), respectively, for 5 consecutive days. Then, Group I rats received 0.1 mL of normal saline and Groups II-V rats received 10 mg/kg body weight of cisplatin intraperitoneally. Immediately after that, a test meal (1.5 mL/rat) was administered to each group, and after 30 minutes, rats were euthanized to evaluate the percentage of gastric emptying. EEEO at the specified doses reversed the cisplatin-induced delayed gastric emptying. EEEO (500 mg/kg body weight) pretreatment for 5 days before cisplatin challenge in Group IV rats significantly (p < .05) increased gastric emptying to 74.25% ± 7.19%. Reversal of cisplatin-induced delay in gastric emptying by EEEO (500 mg/kg body weight) in Group IV was significantly (p < .05) comparable to that of the ondansetron treated Group V. EEEO possesses the property to reverse the cisplatin-induced delayed gastric emptying and can be used as an antiemetic for the prevention of CINV.

The aim of this study was focused on investigating the possible protective effect of Nigella sativa L. seed extract against cisplatin-induced delay in gastric emptying, in a rat model. Twenty-five male Sprague-Dawley rats were divided into five equal groups as follows: Group I or control group, Group II (cisplatin 10 mg/kg, i.p at day 5), Group III (N. sativa L. 250 mg/kg for 5 days + cisplatin 10 mg/kg, i.p on day 5), Group IV (N. sativa L. 500 mg/kg for 5 days + cisplatin 10 mg/kg, i.p on day 5) and Group V (ondansetron 3 mg/kg/day, per os + cisplatin 10 mg/kg, i.p on day 5). Phenol red meal was adopted to estimate gastric emptying in different groups of the rats. Gastric emptying was significantly increased (p < 0.01) in N. sativa L. seed extract-pretreated rats (Group III and Group IV) when compared to cisplatin treatment alone (Group II). However, ondansetron produced significantly (p < 0.01) better reversal than N. sativa L. seed extract.