Table of Contents
International Scholarly Research Notices
Volume 2014, Article ID 452051, 7 pages
Research Article

In Vitro Intestinal Permeability Studies and Pharmacokinetic Evaluation of Famotidine Microemulsion for Oral Delivery

1Department of Pharmaceutics, Bengal College of Pharmaceutical Sciences & Research, BRB Sarani, Bidhannagar, Durgapur 713212, India
2Department of Industrial Pharmacy, Acharya & B.M. Reddy College of Pharmacy, Soldevanahalli, Bangalore 560090, India
3Nishka Scientific & Reference Laboratories, Hyderabad, India

Received 12 July 2014; Revised 18 November 2014; Accepted 18 November 2014; Published 7 December 2014

Academic Editor: Faiyaz Shakeel

Copyright © 2014 Sajal Kumar Jha et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The absolute bioavailability of famotidine after oral administration is about 40–45% and absorbance only in the initial part of small intestine may be due to low intestinal permeability. Hence, an olive oil based microemulsion formulation with Tween-80 as surfactant and PEG-400 as cosurfactant was developed by using water titration method with the aim of enhancing the intestinal permeability as well as oral bioavailability. In vitro drug permeation in intestine after 8 h for all formulations varied from 30.42% to 78.39% and most of the formulations showed enhanced permeation compared to pure drug (48.92%). Famotidine microemulsion exhibited the higher absorption and achieved from the optimized famotidine formulation (456.20 ng·h/ml) was higher than the standard (126.80 ng·h/mL). It was found that  h obtained from the optimized famotidine test formulation (3023.5 ng·h/mL) was significantly higher than the standard famotidine (1663.3 ng·h/mL). F-1 demonstrated a longer (6 h) compared with standard drug (2 h) and sustained the release of drug over 24 h. The bioavailability of F-1 formulation was about 1.8-fold higher than that of standard drug. This enhanced bioavailability of famotidine loaded in microemulsion system might be due to increased intestinal permeability.