• T Yagi and K Yamauchi.
• Faculty of Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Hyogo, Japan.
• J. Pharm. Pharmacol. 1999 Jan 1; 51 (1): 93-5.

AbstractThis study was performed to determine whether intracaecally administered rhein anthrone and anthraquinones such as aloe-emodin, chrysophanol, emodin or rhein synergistically enhance the purgative action as has been observed for rhein anthrone and aloe-emodin anthrone. These anthraquinones were less potent than rhein anthrone. An equimolar mixture of aloe-emodin and rhein anthrone had synergistic potentiating effects because the ED50 value (50% purgative dose) of the combination was smaller than that calculated additively from the ED50 values of aloe-emodin and rhein anthrone. An equimolar mixture of other anthraquinones and rhein anthrone tended to potentiate the purgative action. These results confirmed that rhein anthrone and aloe-emodin synergistically exert a purgative action as has been observed for rhein anthrone and aloe-emodin anthrone.

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