Table of Contents
Chromatography Research International
Volume 2014 (2014), Article ID 523184, 5 pages
Research Article

Stability Indicating Liquid Chromatographic Method for Estimation of Trihexyphenidyl Hydrochloride and Risperidone in Tablet Formulation: Development and Validation Consideration

1A. R. College of Pharmacy & G. H. Patel Institute of Pharmacy, Vallabh Vidyanagar, Anand, Gujarat 388120, India
2AUM Research Laboratories, Rakanpur, Gandhinagar 382721, India
3Indukaka Ipcowala College of Pharmacy, New Vallabh Vidyanagar, Anand, Gujarat 388121, India

Received 11 January 2014; Accepted 13 February 2014; Published 19 March 2014

Academic Editor: Toyohide Takeuchi

Copyright © 2014 Patel Bhaumik 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.


This paper describes validated reverse phase high-performance liquid chromatographic (RP-HPLC) method for simultaneous estimation of trihexyphenidyl hydrochloride (THP) and risperidone (RSP) in the pure powder form and in combined tablet dosage form. The HPLC separation was achieved on a core shell C18 (100 mm length × 4.6 mm, 2.6 μm particle size) using methanol : ammonium acetate buffer 1% (85 : 15 v/v; pH-6.5) as mobile phase and delivered at flow rate of 0.8 mL/min. The calibration plot showed good linear relationship with r2 = 0.997 ± 0.001 for THP and r2 = 0.998 ± 0.001 for RSP in concentration range of 50–175 μg/mL and 50–175 μg/mL, respectively. LOD and LOQ were found to be 0.40 and 1.29 μg/mL for THP and 1.24 and 3.92 μg/mL for RSP. Assay of THP and RSP was found to be 100.16 ± 0.03% and 99.83 ± 0.02%, respectively. THP and RSP were subjected to different stress conditions (acidic, basic, oxidative, thermal, and photolytic degradation). The degraded product peaks were well resolved from the pure drug peak. The method was successfully validated as per the ICH guidelines. The developed RP-HPLC method was successfully applied for the estimation of THP and RSP in tablet dosage form.