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Formulation optimization of meloxicam sodium gel using response surface methodology.

Jui-Sheng Chang1, Yaw-Bin Huang, Sen-Sen Hou

  • 1Graduate Institute of Pharmaceutical Science, College of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City 80708, Taiwan, Republic of China.

International Journal of Pharmaceutics
|March 16, 2007
PubMed
Summary

This study optimized meloxicam sodium gel formulations using response surface methodology. Menthol and azone were identified as key penetration enhancers for improved topical absorption and therapeutic efficacy.

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Area of Science:

  • Pharmaceutical Sciences
  • Dermatology
  • Drug Delivery Systems

Background:

  • Meloxicam sodium is a nonsteroidal anti-inflammatory drug (NSAID) used for pain relief.
  • Enhancing topical drug penetration is crucial for effective localized treatment and reduced systemic side effects.
  • Optimizing formulation composition is key to achieving desired therapeutic outcomes.

Purpose of the Study:

  • To investigate the impact of penetration enhancers on meloxicam sodium absorption through rat skin.
  • To determine the optimal formulation for enhanced topical delivery of meloxicam sodium.
  • To evaluate the in vivo performance and bioavailability of the optimized meloxicam sodium gel.

Main Methods:

  • Response surface methodology (RSM) with uniform design was employed to systematically prepare formulations.
  • Four independent variables were studied: ethanol, propylene glycol (PG), menthol, and azone content.
  • Meloxicam sodium flux through rat skin was measured, and in vivo studies were conducted.

Main Results:

  • Menthol exhibited the most significant influence on meloxicam sodium penetration, followed by azone, ethanol, and PG.
  • An optimal formulation was identified using RSM, achieving a penetration flux exceeding the required therapeutic threshold.
  • In vivo studies showed meloxicam detection within 1 hour and steady-state concentration at 12 hours post-administration.

Conclusions:

  • RSM is an effective tool for optimizing topical drug formulations.
  • Menthol and azone are potent enhancers for topical meloxicam sodium delivery.
  • The optimized meloxicam sodium gel demonstrated favorable in vivo performance and approximately 50.1% bioavailability.