Abstract
Myocardial infarction, i.e., heart attack, is a fatal condition which is on the increase all over the world. It is reported that a large number of heart attack occur in morning hours which are attributable to platelet aggregation. Chronotherapy at this stage can be crucial. Clopidogrel bisulfate (CLB) is an antiplatelet agent and has become a drug of choice for prevention of heart attack. It is soluble in acidic pH and has a narrow absorption window. So, its long residence time in stomach is desirable. Therefore, a novel high density tablet was developed comprising multiparticulate pellets with pulsatile release necessary to maintain chronotherapy of heart attack. The pellets were prepared by extrusion-spheronization and coated in fluidized bed processor with different coating material to achieve pulsatile release. The size, shape of pellets, and drug release were evaluated. High density tablet containing coated pellets was formulated and evaluated for retention in stomach. Quality by design tools was used to design and optimize the processes. Timed release observed by dissolution study showed lag time of 6 h followed by burst release of drug up to 94% in 1 h. Density of tablets was found to be 2.2 g cm−3 which is more than gastric fluid. In vivo x-ray studies in rabbit revealed 8 h of gastric retention of tablet at the bottom of the stomach. Thus, CLB high density pulsatile system looks to open up a window of opportunity for developing formulations with drugs that are stable in gastric region and needed chronotheraupetic activity.
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Nilesh Desai is thankful to University Grants Commission, India, for financial assistance to the work in the form of UGC-BSR Project file no. 7-23/2007(BSR).
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Desai, N., Purohit, R. Development of Novel High Density Gastroretentive Multiparticulate Pulsatile Tablet of Clopidogrel Bisulfate Using Quality by Design Approach. AAPS PharmSciTech 18, 3208–3218 (2017). https://doi.org/10.1208/s12249-017-0805-2
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DOI: https://doi.org/10.1208/s12249-017-0805-2