- Drug-drug interactions of Z-338, a novel gastroprokinetic agent, with terfenadine, comparison with cisapride, and involvement of UGT1A9 and 1A8 in the human metabolism of Z-338. Furuta, S., Kamada, E., Omata, T., Sugimoto, T., Kawabata, Y., Yonezawa, K., Wu, X.C., Kurimoto, T. Eur. J. Pharmacol. (2004)