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In situ forming formulation: development, evaluation, and optimization using 3(3) factorial design.

Ramesh C Nagarwal1, A Srinatha, Jayanta K Pandit

  • 1Department of Pharmaceutics, Institute of Technology, Banaras Hindu University, Varanasi 221005, India.

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Summary
This summary is machine-generated.

This study optimized an in situ forming formulation for extended stomach retention of metformin, an antidiabetic drug. Formulation F17 demonstrated predicted drug release profiles, validating the optimization approach.

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Area of Science:

  • Pharmaceutical Sciences
  • Drug Delivery Systems

Background:

  • Metformin, a key antidiabetic medication, has an absorption window primarily in the upper gastrointestinal tract.
  • Developing extended gastric retention formulations can improve metformin's therapeutic efficacy.

Purpose of the Study:

  • To develop and optimize an in situ forming formulation for prolonged gastric retention of metformin.
  • To investigate the impact of sodium alginate, gellan gum, and metformin concentrations on drug release characteristics.

Main Methods:

  • Utilized a 3(3) full factorial design to systematically vary concentrations of sodium alginate, gellan gum, and metformin.
  • Characterized formulations based on in vitro drug release parameters, including release exponent and dissolution efficiency.
  • Employed ANOVA and 3D surface response plots for statistical analysis and visualization of variable interactions.

Main Results:

  • Optimized formulation F17, containing medium sodium alginate, low gellan gum, and medium metformin, exhibited drug release profiles consistent with predictions.
  • Statistical analysis confirmed significant interactions between independent variables and dependent release parameters (p < 0.05).

Conclusions:

  • The 3(3) factorial design effectively optimized in situ forming formulations for extended gastric retention.
  • The developed formulation holds promise for improving metformin's pharmacokinetic profile and therapeutic outcomes.