Formulation of Pulsatile Delivery of Ramipril: A Chrono- Pharmaceutical Approach for the Treatment of Hypertension

The aim of present study was to formulate and evaluate oral multiparticulate pulsatile release of ramipril based on chronophamaceutical approach for the treatment of hypertension. In the present study the immediate release core mini tablets were prepared by direct compression by using various proportions of different superdisintegrants. The optimized core tablets were then coated with pH sensitive polymers like Eudragit -S100 and Eudragit- L100. To achieve the desired dissolution profile, various parameters like coating duration and coat thickness studied. The coated tablets were evaluated for hardness, thickness, friability, weight variation, drug content, and disintegration time and in-vitro drug release. In-vitro drug release was found to be 98 % from coated tablets in 20 min after 5 hrs lag time. FT-IR spectra revealed that there is no chemical incompatibility between the drug and other excipients. Scanning electron micrograph of optimized tablet shown that the thickness level in the coating. The results concluded the programmable pulsatile release has been achieved from coated tablets after a lag time of 5 hrs, which is consistent with the demands of the chronotherapeutic drug delivery and increasing bioavailability.

Author(s): Vure Prasad, Sri Vidya, Madhu Babu and Prakash V Diwan

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