The article entitled 鈥楧rug firms in dispute over side effects of ulcer
treatments鈥� (This Week, 3 March) incorrectly stated that the H2
blocker ranitidine induced the formation of carcinoid nodules in the stomachs
of rats. Ranitidine does not have this effect and for this reason can be
used for the long-term maintenance of ulcer patients as well as for their
acute treatment.
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