Formulation and In Vitro Evaluation of Ciprofloxacin Matrix Tablets: Effect of DrugPolymer Ratio
Journal Title: Tropical Journal of Natural Product Research - Year 2018, Vol 2, Issue 5
Abstract
Received 25 April 2018 Revised 08 May 2018 Accepted 09 May 2018 Published online 10 May 2018 An ideal tablet should combine good mechanical strength with adequate drug release profile. This work aims to study the effect of drug-polymer ratio on the mechanical properties and release profile of ciprofloxacin tablet. Ciprofloxacin formulations containing drug and the polymers (Chrysophyllum albidum gum (CAG), hydroxypropylmethylcellulose (HPMC) and xanthan gum) in ratios of 2:1, 1:1 and 1:2, respectively were prepared by direct compression. The crushing strength, friability and the time taken for 50% (T50) and 90% (T90) drug release were obtained. The mechanism of drug release was also determined. Tablets containing CAG had significantly (p<0.05) lower crushing strength than those containing other polymers. In tablets containing xanthan gum and HPMC, there was an increase in crushing strength as the amount of polymer was increased to equal amount with the drug, but a further increase in polymer concentration to twice the amount of the drug resulted in a decrease in strength. T50 and T90 increased with increase in polymer concentration for formulations containing CAG. Drug release in formulations containing CAG and xanthan gum was by first order kinetics while the zero order model was the most prominent in tablets with HPMC. The first order constant, k1 decreased with increase in polymer concentration for tablets with CAG while the reverse was the case for xanthan gum. However, irrespective of the drug-polymer ratio, all the formulations exhibited super case transport mechanism. This study suggests that the drug-polymer ratio has a significant influence on the mechanical strength and the release profile of ciprofloxacin tablets
Authors and Affiliations
Lateef G. Bakre, Temitayo O. Sholuade
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