Abstract
An increase in the prevalence of gallstones has been reported from the Middle East and the Republic of Yemen. Changing dietary habits and obesity are thought to be responsible but other local factors may contribute such as chewing the leaves of the khat plant ( Catha edulis Forsk.) which is a widespread social custom in Yemen. We have studied the effects of khat chewing on gallbladder motility in a group of 10 healthy volunteers. All subjects underwent ultrasound measurements of gallbladder volume after chewing khat leaves or lettuce, which was used as the control. Results were compared after chewing for up to 2 h in the fasting state and in response to a fatty meal. There was no significant change in gallbladder volume after chewing khat compared with lettuce in the fasting state ( P=0.7) or in gallbladder emptying after a fatty meal ( P=0.4) and we conclude that khat chewing has no clinically significant effect on gallbladder motility.
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