Patients suffering from type 2 diabetes may not benefit from taking both an oral glucose lowering drug (metformin) and insulin instead of insulin alone, a study published on bmj.com claims.
The researchers say the combination leads to better blood sugar control, less weight gain and less need for insulin. However, they also suggest that more trials are needed to provide firm evidence about the long term benefits and harms of the combination and specifically about the risks of premature death.