Design, Development and Evaluation Of Anti-Hypertensive Drug Solid Lipid Nano Particles

Abstract

Recently, solid lipid Nano-particles have received much attention by the researchers owing to its biodegradability, biocompatibility and the ability to deliver a wide range of drugs. The aim of the present study was to design Diltiazem solid lipid Nano-particles and to evaluate them. Diltiazem solid lipid Nano-particles were prepared by hot homogenization technique using different lipids (Tristearin, GMS and Comprital), soy lecithin as stabilizers and tween 80, Poloxamer as surfactants. The Nano-particles were evaluated for particle size & PDI, zeta potential, entrapment efficiency and in vitro drug release. The particle size ranged from 49.7 to 523.7 nm. PDI of all formulations were good within the range of 0.189 to 0.427. The zeta potential ranged from -10.5 to -29.6 Mv, Entrapment efficiency of all formulations were observed was in the range of 78.68 to 95.23 %. The cumulative percentage release of Diltiazem from different Diltiazem Nano-particles varied from 53.36 to 88.74% depending upon the drug lipid ratio and the type of lipid used. The average percentage of drug released from different SLNs after 24 hours showed in the following order: F9 (53.35%) < F6 (56.75%) < F4 (61.74%) < F7 (63.8%) < F5(67.77%) < F8(69.04%) < F3(75.31%) < F1(79.36%) <F2 (88.74%) respectively. The release kinetic studies showed that the release was first order diffusion controlled and the n values obtained from the Korsmeyer-Peppa’s model indicated the release mechanism was Quasi-Fickian type (n-value of 0.47). Keywords: Diltiazem, solid lipid Nano-particles, FTIR, in vitro drug release.