PEGylated liposome containing sildenafil for the treatment of hypertension
The purpose of this study was to prepare PEGylated liposomes containing sildenafil for the treatment of pulmonary arterial hypertension. PEGylated liposomes were prepared by thin film hydration method by varying the concentration of lipids. The prepared liposomes were characterized for the particle size, PDI, zeta potential, % entrapment efficiency and in-vitro release study. The optimized formulation exhibits a particle size of 104.27±1.4 nm, PDI of 0.449±0.02, zeta potential of -42.9±0.7 along with the maximum encapsulation of drug i.e. 87.30±2.6. Optimized formulation showed % cumulative drug release of 85.38±0.26 in 48 hr. From the study it can be concluded that the PEGylated liposomes containing sildenafil for the treatment of pulmonary arterial hypertension provides a sustained release of drug and further studies are required to confirm their efficacy at clinical level.
Keywords: Sildenafil; PEGylated liposomes; Pulmonary arterial hypertension; % entrapment efficiency
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