Microencapsulation of erythromycin and clarithromycin using a spray-drying technique

Area of Science:

• Pharmaceutical Technology
• Materials Science

Background:

• Traditional microencapsulation methods struggle with particles under 100 micrometers, often requiring organic solvents or multi-step procedures.
• Bitter taste of antibiotics like erythromycin and clarithromycin poses challenges for patient compliance, particularly in oral suspensions.

Purpose of the Study:

• To investigate the feasibility of a single-step spray-drying process for microencapsulating erythromycin and clarithromycin.
• To develop a palatable oral formulation for taste-masked antibiotics.

Main Methods:

• A one-step spray-drying technique was employed using mixtures of clarithromycin (5% by weight) or erythromycin (30% by weight) with a biodegradable polymer.
• Specific conditions of temperature and turbine speed were optimized during the spray-drying process.

Main Results:

• The spray-drying process successfully microencapsulated approximately 80% of both erythromycin and clarithromycin, as quantified by high-performance liquid chromatography.
• Electron microscopy revealed that the resulting microcapsule particle sizes ranged from 1 to 80 micrometers.

Conclusions:

• Microencapsulation of macrolide antibiotics using spray-drying is a viable and efficient technique.
• This spray-drying microencapsulation method holds promise for creating palatable oral suspensions of bitter-tasting drugs, improving patient adherence.