FORMULATION AND EVALUATION OF BOSENTAN PULSATILE DRUG DELIVERY SYSTEM BY USING PRESS COAT TECHNIQUE

A. Yasodha, Srinivas Rao and B. Sravani*

ABSTRACT

In the present research work, we have designed a pulsatile formulation of Bosentan to treat High blood pressure as per the chronotherapeutic pattern of the disease. Core tablets were prepared by incorporating different concentration of disintegrants and were compressed in between different concentration of polymers. The core and compression coated tablets were subjected to pre- formulation, physicochemical and In-vitro drug release studies. FTIR studies revealed that there was not any chemical reaction between pure drug Bosentan and polymers. The pre and post- compressional parameters of tablets were also found to be within limits. Our optimized formulation F-6 releases Bosentan after a lag time of 2 hours and 98.01 % up to 12 hours. Formulations were stable for at least 3 months under standard long-term and accelerated storage conditions.

Keywords: Pulsatile formulation, Bosentan, Croscarmellose sodium, Carbopol 974P, HPMC K15, Ethyl cellulose and Compression coated tablets.