Development of a Prolonged-Release Gastroretentive Tablet Formulation of Ciprofloxacin Hydrochloride: Pharmacokinetic Characterization in Healthy Human Volunteers Publisher Pubmed



Mostafavi A¹ ; Emami J¹ ; Varshosaz J¹ ; Davies NM² ; Rezazadeh M¹ Show Affiliations
Source: International Journal of Pharmaceutics Published:2011

Abstract

The fluroquinolone anti-biotic ciprofloxacin is primarily dissolved and absorbed from the upper part of the GI tract. We, therefore, aimed to develop a prolonged release gastroretentive (GT) formulation of ciprofloxacin that could be administered once daily with a conventional tablet (CT). A variety of polymers and effervescent properties were utilized to optimize the desired disposition profile. Tablets were prepared by the direct compression technique and evaluated for physical properties, swelling, floating, and drug release. In vivo studies were also carried out on the optimized GT formulation and CT in healthy volunteers. A very sensitive and reliable HPLC method was developed to measure plasma concentration of ciprofloxacin. The duration of floating times were predominantly >24 h and floating lag times <20 s. The drug release mechanism followed zero order kinetics. Cmax, Tmax, and AUC0-∞ of GT vs CT were 0.945 ± 0.29 vs 2.1 ± 0.46 μg/ml, 6.0 ± 1.42 vs 1.42 ± 0.59 h and 8.54 ± 1.87 vs 9.45 ± 2.12 μg/ml/h, respectively. Pharmacokinetic parameters indicate that the developed GT formulation extended the pharmacokinetic profile achieved with CT. The Cmax/MIC and AUC0-∞/MIC, which are indicative of eradication of pathogens, following co-administration of GT with CT were comparable to those of twice-daily administration of CT alone. © 2011 Elsevier B.V. All rights reserved.