Findings of long-term changes in relation to TH protein expression show that rats have increased TH protein expression following single or recurrent hypoglycaemia, while studies in mice show that TH protein levels return to basal levels in the context of recurrent hypoglycaemia, indicating that the catecholamine synthetic response of the adrenal medulla to recurrent hypoglycaemia may be species specific or experimental design specific. Here, TH is linked to Hypoglycemia.