Development and physicochemical characterization of clindamycin resinate for taste masking in pediatrics

Purpose: To evaluate the physicochemical characteristics of clindamycin HCl in a complex form (resinate) with ion exchange resin (IER) (Amberlite IRP69).Methods: Drug–resin complex was prepared by simple aqueous binding method. Drug binding study was carried out at different drug and resin concentrations. Several physicochemical characterization studies were conducted to evaluate the resinate complex. These studies included flow properties, in vitro drug release in SGF and SIF, DSC, TGA, mass spectroscopy and XPRD evaluations. In addition, stability study of resinate complex was conducted at 25 and 40 °C for up to 1 month.Results: Clindamycin and Amberlite IRP69 have formed a complex (resinate) and have shown good flow properties, good thermal properties and chemical stability (short term over 4 weeks) at 25 and 40 °C. Clindamycin release profiles from resinate in SGF and SIF have shown immediate release characteristics and release in simulated saliva has shown dependence on water volume.Conclusion: The clindamycin stable complex with IER (Amberlite IRP69) has the potential for further development as a compatible pediatric liquid formulation (suspension) or a fast disintegrating tablet.