Monolithic osmotic tablet containing solid dispersion of 10-hydroxycamptothecin.

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Materials Science

Background:

• Water-insoluble drugs present challenges for effective therapeutic delivery.
• Developing controlled-release formulations is crucial for improving drug efficacy and patient compliance.
• 10-hydroxycamptothecin (HCPT) is a water-insoluble compound with therapeutic potential requiring advanced delivery methods.

Purpose of the Study:

• To develop and characterize a novel monolithic osmotic tablet for the controlled delivery of water-insoluble 10-hydroxycamptothecin (HCPT).
• To investigate the drug release kinetics and influencing factors of the prepared osmotic tablet formulation.

Main Methods:

• Preparation of a monolithic osmotic tablet using a solid dispersion technique with polyethylene glycol 6000 and HCPT.
• Incorporation of polyethylene oxide as a suspending agent and sodium chloride as an osmotic agent into the tablet core.
• In vitro drug release studies were conducted under various conditions to assess release rate and independence.

Main Results:

• The optimized monolithic osmotic tablet demonstrated a consistent HCPT release rate of 1.21 mg/hour for 12 hours.
• Achieved cumulative in vitro release exceeding 90%, independent of environmental media and stirring rate.
• Drug release was found to be co-controlled by osmotic pressure, suspending effect, and drug solubility within the solid dispersion.

Conclusions:

• The monolithic osmotic tablet formulation incorporating solid dispersion is a promising approach for the controlled delivery of water-insoluble drugs like HCPT.
• This system offers predictable and sustained drug release, potentially enhancing therapeutic outcomes.
• The study highlights the potential of solid dispersion technology in overcoming challenges associated with poorly soluble drugs.