Table 3 DSC Setting for Thermal Analysis of Each Sample Sample Heating range (°C) Heating rate (°C/min) Initial Final Optimised formulation 0 320 5 Lecithin 10 100 3 Chitosan 50 320 10 PEG 2000 0 320 10 Acyclovir 50 320 10 Physical mixture 0 320 10