A review.Teneligliptin is the newest DPP4 inhibitor approved by the regulatory authority for the treatment of Diabetes mellitus.Teneligliptin [TEN20], is approved in Japan, India, Korea, Argentina and currently undergoing Phase I trials in the USA and Phase II trials in Europe for the treatment of T2DM.Teneligliptin scores over other 'gliptins' in being more economical and with better efficacy to control blood glucose and HbA1C levels.Teneligliptin addnl. offers other pharmacol. advantages like longer half-life, lesser IC50 value, tight and extensive binding to the DPP4 enzyme.Teneligliptin has been studies extensively for its safety and efficacy in various clin. trials conducted internationally.Teneligliptin has sufficient and adequate clin. data to prove itself as monotherapy and combination therapy with other Anti-Diabetic agents.No dose adjustment is requires in renal failure but certain studies included dose reduction in mild to moderate hepatic failure.Certain clin. trials have demonstrated cardio-protective effects of teneligliptin in T2DM patients with increase in serum adiponectin levels.It is safe and well tolerated, also weight neutral, have low risk of Hypoglycemia and are equally efficacious with rare side effects compared to other gliptins.This review article comprehensively documents the available clin. and pharmacol. data for Teneligliptin in the treatment of Diabetes mellitus.