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Figure 12: DSC thermograms of (a) DRZ loaded CSNPs, (b) Blank CSNPs and (c) DRZ powder. DRZ loaded CSNPs showed the prominent endotherm of DRZ indicating weak interaction of DRZ with CS. Abbreviations: CSNPs, chitosan nanoparticles; DRZ, dorzolamide hydrochloride; DSC, differential scanning calorimetry.