Bioavailability of starch based hot stage extrusion formulations

Area of Science:

• Pharmaceutical Technology
• Drug Delivery Systems
• Biomaterials Science

Background:

• Controlled drug delivery aims to optimize therapeutic efficacy and patient compliance.
• Starch-based formulations offer potential for developing cost-effective and biodegradable drug delivery systems.
• Hot-melt extrusion is a versatile technique for manufacturing solid dosage forms.

Purpose of the Study:

• To develop a starch-based hot-melt extrusion formulation for controlled drug delivery.
• To evaluate the in vivo performance of the developed formulation.
• To compare the experimental formulation with a commercially available sustained-release product.

Main Methods:

• A formulation comprising corn starch, sorbitol, theophylline monohydrate, and glyceryl monostearate was prepared using hot-melt extrusion.
• Extrudates were dried, cut, and filled into hard gelatin capsules.
• In vivo behavior was assessed in a randomized crossover study, with plasma samples analyzed via HPLC-UV.

Main Results:

• The experimental dosage form demonstrated a retarded dissolution profile, releasing approximately 80% of the drug in 8 hours.
• In vivo studies confirmed sustained release characteristics of the starch-based formulation.
• The developed formulation exhibited lower performance compared to the reference multiple-unit sustained-release product.

Conclusions:

• Starch-based hot-melt extrusion is a viable method for creating sustained-release drug delivery systems.
• Further optimization is needed to match the performance of existing multiple-unit sustained-release products.
• This formulation shows promise for controlled theophylline delivery.