In the research , Eighty-four patients with HbA1c between 7.5 and 9.5% (58–80 mmol/mol) were randomized to 48-week treatment with placebo (n = 41) or diacerein 100 mg/day (n = 43). The primary outcome was the difference in mean HbA1c changes during treatment. Secondary outcomes were other efficacy and safety measurements. A general linear regression with repeated measures, adjusted for age, sex, diabetes duration, and each baseline value, was used to estimate differences in mean changes. Both intention-to-treat (ITT) analysis and per-protocol analysis (excluding 10 patients who interrupted treatment) were performed.
It was found that Diacerein reduced HbA1c compared with placebo by 0.35% (3.8 mmol/mol; P = 0.038) in the ITT analysis and by 0.41% (4.5 mmol/mol; P = 0.023) in the per-protocol analysis. The peak of effect occurred at the 24th week of treatment (−0.61% [6.7 mmol/mol; P = 0.014] and −0.78% [8.5 mmol/mol; P = 0.005], respectively), but it attenuated toward nonsignificant differences at the 48th week. No significant effect of diacerein was observed in other efficacy and safety measures. Diarrhea occurred in 65% of patients receiving diacerein and caused treatment interruption in 16%. Seven patients in the diacerein group reduced insulin dosage, whereas 10 in the placebo group increased it; however, mild hypoglycemic events were equally observed.
Therefore it was concluded that Diacerein reduced mean HbA1c levels, with peak of effect at the 24th week of treatment. The drug was well tolerated and may be indicated as adjunct treatment in patients with type 2 diabetes, particularly in those with osteoarthritis.
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Dr. Kamal Kant Kohli
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