to test whether azathioprine in effective in rheumatoid arthritis in doses smaller than those normally used the drug was tested at 2 dosage levels , 2.5 and 1.25 mg/kg/day ( 2.5 az and 1.25 az ) , against placebo under double-blind conditions over 24 weeks .
C0004482
azathioprine
C0003873
rheumatoid arthritis