serum creatinine and beta 2-microglobulin levels , endogenous creatinine clearance , the urinary beta 2-microglobulin excretion rate , and urinary protein levels were monitored serially in 29 patients with duodenal ulcers randomly allocated to receive eight weeks of treatment with cimetidine , ranitidine , or an antacid .
C0013295
duodenal ulcers
C0034665
ranitidine