AAPS PharmSciTech

, Volume 14, Issue 4, pp 1333–1340

Stability of Benzocaine Formulated in Commercial Oral Disintegrating Tablet Platforms


  • Melanie Köllmer
    • Department of Biopharmaceutical SciencesUniversity of Illinois
  • Carmen Popescu
    • Roquette America Inc.
  • Prashanth Manda
    • Roquette America Inc.
    • Department of PharmaceuticsUniversity of Mississippi
  • Leon Zhou
    • Roquette America Inc.
    • Department of Biopharmaceutical SciencesUniversity of Illinois
    • Department of BioengineeringUniversity of Illinois
    • Department of Ophthalmology and Visual SciencesUniversity of Illinois
Research Article

DOI: 10.1208/s12249-013-0015-5

Cite this article as:
Köllmer, M., Popescu, C., Manda, P. et al. AAPS PharmSciTech (2013) 14: 1333. doi:10.1208/s12249-013-0015-5


Pharmaceutical excipients contain reactive groups and impurities due to manufacturing processes that can cause decomposition of active drug compounds. The aim of this investigation was to determine if commercially available oral disintegrating tablet (ODT) platforms induce active pharmaceutical ingredient (API) degradation. Benzocaine was selected as the model API due to known degradation through ester and primary amino groups. Benzocaine was either compressed at a constant pressure, 20 kN, or at pressure necessary to produce a set hardness, i.e., where a series of tablets were produced at different compression forces until an average hardness of approximately 100 N was achieved. Tablets were then stored for 6 months under International Conference on Harmonization recommended conditions, 25°C and 60% relative humidity (RH), or under accelerated conditions, 40°C and 75% RH. Benzocaine degradation was monitored by liquid chromatography–mass spectrometry. Regardless of the ODT platform, no degradation of benzocaine was observed in tablets that were kept for 6 months at 25°C and 60% RH. After storage for 30 days under accelerated conditions, benzocaine degradation was observed in a single platform. Qualitative differences in ODT platform behavior were observed in physical appearance of the tablets after storage under different temperature and humidity conditions.

Key words

benzocainedegradationoral disintegrating tabletplatformstability

Copyright information

© American Association of Pharmaceutical Scientists 2013