Development and application of a validated HPLC method for the determination of gabapentin and its major degradation impurity in drug products

J Pharm Biomed Anal. 2007 Apr 11;43(5):1647-53. doi: 10.1016/j.jpba.2006.12.020. Epub 2007 Jan 5.


A simple isocratic reversed-phase HPLC method for the determination of gabapentin and its major degradation impurity, 3,3-pentamethylene-4-butyrolactam, was developed and validated for use in the analysis of pharmaceutical tablets and capsules. Separation was achieved on a Brownlee Spheri-5 Cyano column using an acetonitrile-10 mM KH2PO4/10 mM K2HPO4 (pH 6.2) (8:92, v/v) mobile phase. The compounds were eluted isocratically at a flow rate of 1 mL/min. Both compounds were analyzed with UV detection at 210 nm. The method was validated according to USP Category I requirements for gabapentin and USP Category II for 3,3-pentamethylene-4-butyrolactam. The validation characteristics included accuracy, precision, linearity, range, specificity, limit of quantitation and robustness. Validation acceptance criteria were met in all cases. This method was used successfully for the quality assessment of four gabapentin drug products.

MeSH terms

  • Amines / analysis*
  • Amines / chemistry
  • Analgesics / analysis*
  • Analgesics / chemistry
  • Anticonvulsants / analysis*
  • Anticonvulsants / chemistry
  • Capsules
  • Chromatography, High Pressure Liquid / methods*
  • Cyclohexanecarboxylic Acids / analysis*
  • Cyclohexanecarboxylic Acids / chemistry
  • Drug Contamination
  • Excitatory Amino Acid Antagonists / analysis*
  • Excitatory Amino Acid Antagonists / chemistry
  • Gabapentin
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Spectrophotometry, Ultraviolet
  • Tablets
  • Technology, Pharmaceutical
  • gamma-Aminobutyric Acid / analysis*
  • gamma-Aminobutyric Acid / chemistry


  • Amines
  • Analgesics
  • Anticonvulsants
  • Capsules
  • Cyclohexanecarboxylic Acids
  • Excitatory Amino Acid Antagonists
  • Tablets
  • gamma-Aminobutyric Acid
  • Gabapentin