https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4112077/ It looks like those receiving Prednisolone or other steroid treatment and who start developing type-2 diabetes may need different treatment and benefit from different test regime. The main takeaways from this for me were that *Steroids can reduce sensitivity of insulin recep tors. * treatment with metformin is possibly not a good idea. Exenatide was mooted as an option. *Post-prandial spikes rather than fasting levels are most affected hence HbA1c and fasting tests are not the best indiactors. *Insulin therapy (temporary until steroids are discontinued) may be best BUT standard dosing guidelines are inappropriate and may cause nighttime hypos. And, as with most things, early identification of a problem is best. This gibes with most practical, one size fits all, treatment regimes: wait and see with std thresholds, followed by standard drug prescribing on a linear progression. The article has sections covering different groups such as transplantees that may receive steroid treatment.