From MEpedia, a crowd-sourced encyclopedia of ME and CFS science and history

Telmisartan is a anti-hypertension drug that has some other interesting benefits. Telmisartan enhances insulin sensitivity, increases utilization of fat as energy, and improves mitochondrial function. This last benefit is what is of interest for CFS/ME sufferers. Mitochondrial dysfunction is a theory of what causes some of the CFS/ME symptoms.