Introduction: Polymeric nanoparticles loaded with eprosartan mesylate by nano precipitation
technique have been prepared for improving the solubility and dissolution rate. It is a BCS class-
II, water insoluble antihypertensive drug with 13% oral bioavailability. Polymeric nanoparticles of
such drug were developed using Eudragit L-100 and S-100 as polymers by nano precipitation method.
FT-IR and DSC studies reveal that drug is compatible with the selected polymers and it does not
show any extra peaks.
Materials and Method: PEG 200 was used as a non-volatile, non toxic solvent to dissolve the selected
drug and polymers Poloxamer 188 and Gelucire 44/14 were used as surfactant-cum stabilizer for
stabilization of formed nano dispersion. Optimization of formulations by 22 central composite design
has been employed to find out the robust formulation by selecting concentration of Eudragit L-100 as
polymer and polaxamer 188 as stabilizer for the selected responses like entrapment efficiency, particle
size, zeta potential and polydispersibility index. Prepared polymeric nanoparticles were further
characterized for particle size, zeta potential, entrapment efficiency and in-vitro drug release.
Result: From the study, Eudragit L-100 and poloxamer 188 based formulations formed stable nanoparticles
with good entrapment efficiency as well as better drug solubility or dissolution rate in PEG
200 as compared to Eudragit S-100 based formulations. Short term stability study for an optimized
run (R3) up to 3 months showed stability without significant variation of entrapment efficiency and in
vitro dissolution rate.
Conclusion: Dissolution kinetic data and diffusion exponent values suggested that optimized formulation
followed Higuchi model with non-Fickian transport mechanism.