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Published on:August 2021
Indian Journal of Pharmaceutical Education and Research, 2021; 55(3):664-676
Original Article | doi:10.5530/ijper.55.3.138

Self-nanoemulsifying Drug Delivery System of Cilnidipine

Authors and affiliation (s):

Monica Raghavendra Prasad Rao*, Sayali Kulkarni, Ashwini Sonawane, Sayali Sugaonkar

Department of Pharmaceutics, AISSMS College of Pharmacy, Pune, Maharashtra, INDIA.


Aim: Self-nanoemulsifying Drug Delivery Systems (SNEDDS) are physically stable, isotropic mixtures of oil, surfactant and co-surfactant. The turbulence generated by peristaltic movements of the GIT causes formation of oil-in-water (o/w) nano-emulsions upon dilution. The objective of this study was to improve solubility and oral bioavailability of Cilnidipine by formulating liquid-SNEDDS. Materials and methods: Capmul PG8 NF, Cremophor RH40, and Transcutol HP were selected as oil, surfactant, and co-surfactant. Ternary phase diagrams were constructed to evaluate the nanoemulsification region. A 32 factorial design was employed to optimize L-SNEDDS with droplet size and drug release as responses. SNEDDS of CLN was evaluated for droplet size, self-emulsification time, in vitro drug release, ex-vivo permeation, pharmacokinetics and tissue distribution studies and stability studies. The optimized L-SNEDDS was converted into solid form using β-cyclodextrin nanosponges as adsorbents and evaluated in terms of micromeritics, drug content, scanning electron microscopy and powder X-ray diffraction. Results: The optimized batch exhibited droplet size of 23.70 nm, and in vitro drug release of 95.24 % in 60 min.The in-vivo studies revealed nearly 5.53 folds increase in AUC0-∞ of optimized batch of liquid SNEDDS compared to CLN which can be credited to increase in solubility and dissolution rate. Conclusion: In vivo studies revealed improved pharmacokinetic properties which were attributed to greater surface area and lymphatic absorption leading to circumvention of hepatic first pass metabolism.

Key words: Cilnidipine, 32 factorial designs, Nanosponges, solid SNEDDS, Oral bioavailability.



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The Official Journal of Association of Pharmaceutical Teachers of India (APTI)
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Indian Journal of Pharmaceutical Education and Research (IJPER) [ISSN-0019-5464] is the official journal of Association of Pharmaceutical Teachers of India (APTI) and is being published since 1967.


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