3D printing of gummy drug formulations composed of gelatin and an HPMC-based hydrogel for pediatric use.

The 3D printing of drug formulations is a promising method for preparing tailored medicines following the approval of 3D printed tablets by the US FDA in 2015. Appropriate dosage forms for pediatric patients are deficient because drugs have been developed for mainly adult patients. Here, we fabricated gummy drug formulations for pediatric patients using a 3D bioprinter compatible with semi-solid materials such as hydrogels and pastes. The gummy drug formulations were composed of gelatin, HPMC, reduced syrup, water and the antiepileptic drug lamotrigine. The formulations were extruded from the nozzle of the 3D bioprinter under air pressure and laminated from the bottom in a layer-by-layer process. The incorporation of HPMC aided smooth printing at room temperature, and gelatin and HPMC affected the viscosity of the drug formulation and the printability of the formulations. The strength of the gummy formulations was remarkably influenced by the gelatin concentration. Dissolution tests showed 85% drug release within 15 min from most formulations. The results suggest that 3D printing is an effective method for preparing gummy drug formulations with various shapes in different colors, and that the methodology may improve drug adherence of pediatric patients in future clinical settings.