Channeling agent and drug release from a central core matrix tablet

Area of Science:

• Pharmaceutical Technology
• Drug Delivery Systems
• Materials Science

Background:

• Oral drug delivery remains a cornerstone of therapeutic strategies.
• Achieving controlled drug release profiles is crucial for optimizing efficacy and patient compliance.
• Existing systems often face challenges in providing predictable lag times and sustained release.

Purpose of the Study:

• To develop and characterize a novel oral dosage form for controlled drug release after a predetermined lag time.
• To investigate the influence of channeling agents and polymer properties on lag time and release kinetics.
• To evaluate the potential for once-daily oral dosing using this new delivery system.

Main Methods:

• Formulation of a drug-containing core coated with a polymeric matrix comprising channeling agents (NaCl, mannitol, Emdex) and Eudragit RS100.
• Systematic variation of channeling agent type and particle size.
• Rheological characterization of polymer-channeling agent mixtures.
• In vitro dissolution testing to assess lag time and drug release kinetics.

Main Results:

• Lag time was significantly influenced by the type and particle size of channeling substances.
• Rheological properties of the binary mixtures impacted lag time.
• Drug release kinetics were notably affected by excipient type and particle size.
• In vitro data indicated potential for controlled, once-daily oral drug delivery.

Conclusions:

• The developed oral dosage form effectively achieves controlled drug release after a specific lag time.
• Channeling agent characteristics and rheological properties are critical parameters for controlling lag time.
• Excipient selection and particle size are key determinants of drug release kinetics.
• This system holds promise for simplifying dosing regimens through once-daily administration.