“…may limit its use; moreover chronic administration may cause hyperlactatemia, due to drug accumulation, with resultant lactic acidosis (Page, 2011). The poor bioavailability and short half-life of this drug (Dunn and Peters, 1995;Scheen, 1996), make the development of extended-release formulations desirable, in order to improve patient compliance and reduce the dosing frequency, resulting in better glycemic control and less side effects appearance (Di Colo et al, 2002;Hu et al, 2006;Corti et al, 2007Corti et al, , 2008; Momoh et al, 2013Momoh et al, , 2014Nayak et al, 2013;Li et al, 2014;Kim and Park, 2015).…”