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Development and validation of a specific stability indicating high performance liquid chromatographic method for
B Mallikarjuna Rao1, Sivaiah Sangaraju, M K Srinivasu
1Analytical Research, Custom Pharmaceutical Services, Dr. Reddy's Laboratories, Hyderabad 500049, India. bmrao@dreddys.com
Journal of Pharmaceutical and Biomedical Analysis
|March 28, 2006
Summary
A new stability-indicating reversed-phase liquid chromatography method accurately quantifies rizatriptan benzoate, a migraine treatment. This method effectively separates the drug from its degradation products, ensuring reliable analysis.
Area of Science:
- Analytical Chemistry
- Pharmaceutical Analysis
Background:
- Rizatriptan benzoate is a key medication for treating migraine headaches.
- Accurate quantitative determination and impurity profiling are crucial for pharmaceutical quality control.
Purpose of the Study:
- To develop and validate a stability-indicating reversed-phase liquid chromatography (RP-LC) method for rizatriptan benzoate.
- To assess the degradation behavior of rizatriptan benzoate under various stress conditions.
Main Methods:
- A gradient RP-LC method was optimized using an Agilent Zorbax SB-CN column.
- Forced degradation studies were conducted using acid, base, oxidation, heat, and light.
- The method was validated according to International Council for Harmonisation (ICH) guidelines.
Main Results:
- The developed method achieved good resolution between rizatriptan benzoate and its degradation products.
- Mild degradation was observed under basic conditions, with significant degradation under oxidative stress.
- Mass balance was consistently close to 99.7%, confirming the method's stability-indicating nature.
Conclusions:
- The validated RP-LC method is suitable for the quantitative determination of rizatriptan benzoate and related substances.
- The method provides a reliable tool for stability testing and quality control of rizatriptan benzoate bulk samples.
