Diabetes and tuberculosis (TB) have existed for thousands of years. Today, the global burden of disease from diabetes and TB is huge and, in the case of diabetes, rapidly increasing. Recent systematic reviews show that diabetes is associated with an increased risk of TB, yet the potential public health and clinical importance of the association seems to be largely ignored. Irrespective of whether the association is causal or a result of co-morbid factors, in low-resource societies with a dual disease burden, can a common health system approach for diabetes and TB be adapted to address prevention and care? How and to what extent can this be done? Good-quality implementation research is urgently needed to create robust action plans to address this double burden.