Abstract
The effect of gastric surgery on the absorption of quinidine, ethambutol, and sulphafurazole was studied in 14 male patients, all serving as their own controls. Antrectomy with gastroduodenostomy (ABI) and selective vagotomy lowered the serum levels of all drugs significantly during the 6-hour test period. Excretion of drugs in 6-hour urine also decreased. Three patients showed practically no absorption up to 2 hours, and even therafter the absorption was lowered. Over one year after operation the urinary excretion of ethambutol, but not of the other drugs, was improved. ABI alone did not modify absorption. Preoperative gastric retention seemed to delay absorption.
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