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A rapid method for creating drug implants: translating laboratory-based methods into a scalable manufacturing

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  • 1Stanley Center for Experimental Therapeutics, Department of Psychiatry, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

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This study introduces a scalable extrusion method for manufacturing antipsychotic implants, improving medication compliance in schizophrenia treatment. The new process offers a viable alternative to laborious solvent-cast pellets for enhanced patient outcomes.

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Area of Science:

  • Pharmaceutical Sciences
  • Biomaterials Engineering
  • Drug Delivery Systems

Background:

  • Medication non-compliance significantly impacts schizophrenia treatment outcomes.
  • Current implantable drug delivery systems, like solvent-cast pellets, are often laborious and time-consuming to produce, limiting their widespread clinical use.

Purpose of the Study:

  • To develop a continuous and scalable extrusion method for fabricating antipsychotic drug implants.
  • To optimize the extrusion process for improved drug release profiles and surface morphology.
  • To assess the preliminary biocompatibility of the manufactured haloperidol implants in an animal model.

Main Methods:

  • Adapted a previous solvent-cast pellet fabrication process into a continuous extrusion method.
  • Utilized in vitro release studies, drug load consistency analysis, and scanning electron microscopy for process optimization.
  • Evaluated the biocompatibility of optimized haloperidol implants in rat models.

Main Results:

  • Extrusion process parameters (barrel temperature, screw speed, processing pressure) were found to influence implant surface morphology and drug release kinetics.
  • Reduced surface porosity in implants shifted the drug release mechanism from bulk to surface degradation of the polymer matrix (poly(lactic-co-glycolic acid)).
  • Extrusion resulted in a longer lag period before drug release initiation.

Conclusions:

  • Extrusion is a viable and scalable manufacturing process for antipsychotic drug implants.
  • The optimized extrusion method offers potential for improved medication adherence and patient outcomes in schizophrenia treatment.
  • Further research into the long-term performance and biocompatibility of these extruded implants is warranted.