Background:
Ramipril, an antihypertensive drug exhibit 28% of oral bioavailability and also expelled quickly through the kidneys. Moreover, numerous side effects reported by the ramipril such as, hypotension (postural), increasing potassium level, and angioedema, when presented as an immediate dosage form. Hence, to conquer the side-effects associated with the drug and to increase its bioavailability.
Objective:
The intention of the proposed approach was to design, develop and optimize Ramipril loaded solid lipid nanoparticles.
Methods:
Solvent emulsification and evaporation method were employed to prepare Ramipril loaded solid lipid nanoparticles containign stearic acid and phosphatidylcholine as a lipid and surfactant respectively. The prepared formulations have been confirmed with particle size analyzer, %entrapment efficiency, Zeta Potential, SEM, X-ray diffraction study, FTIR, NMR spectroscopy, in-vitro release study and stability study.
Result:
The obtained results were noted to be within the standard limits. No interaction between Ramipril and other excipients, were confirmed with the FT-IR study of the formulations. Particle size analyzer confirmed that the nanometer size of prepared formulations ranges between 200-350nm. Percent entrapment efficiency was observed in the range of 70.61–91.60%. Entrapment and particle size results of the nanoparticles from R5 batch was an adjudged. The designed formulation noted 70.50% cumulative drug release within a period of 7hrs. The designed batch showed mean of zeta potential at-29.4 mV exhibiting good stability of formulation.
Conclusion:
The developed formulation was found to be stable and safe, and represents a promising system for the sustained and controlled delivery of Ramipril.
Optimization of solid lipid nanoparticles prepared by a single emulsification-solvent evaporation method
