GHRL and Nausea: The effect seems to be specific based on the following findings: (1) Ghrelin had no acute effect on drinking since the total liquid consumption during training or test are comparable between ghrelin and vehicle treated groups; (2) Ghrelin had no effect on US processing since ghrelin-treated rats showed similar nausea response as the controls; (3) During training, ghrelin-treated animals drink similar volume of 150 mM LiCl as the controls; (4) Administration of ghrelin shortly after conditioning has no effect on CTA memory consolidation.