[Preparation and Dissolution Evaluation of Breviscapine Self-microemulsion]

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Formulation Development

Background:

• Breviscapine, a key component in traditional medicine, suffers from poor water solubility and bioavailability.
• Developing effective oral delivery systems is crucial for maximizing breviscapine's therapeutic potential.

Purpose of the Study:

• To optimize the formulation and preparation of breviscapine self-microemulsion for oral administration.
• To evaluate the quality, stability, and in vitro dissolution characteristics of the developed self-microemulsion.

Main Methods:

• Formulation optimization utilized solubility experiments, compatibility tests, and pseudo-ternary phase diagrams.
• Key evaluation parameters included self-emulsifying time, appearance, particle size, Zeta potential, drug content, stability, and in vitro dissolution.

Main Results:

• The optimized breviscapine self-microemulsion consisted of caprylic/capric triglyceride (40%), Cremophor RH-40 (50%), and PEG-400 (10%), with a drug loading of 7.0 mg/g.
• The formulation exhibited a uniform, transparent appearance with a particle size of 38.57 nm and Zeta potential of -8.80 mV.
• In vitro dissolution in 0.1 mol/L HCl reached 90.30% within 90 minutes, a 5.9-fold increase compared to the raw drug. Stability testing indicated sensitivity to high temperatures, necessitating low-temperature storage.

Conclusions:

• The preparation of breviscapine self-microemulsion is straightforward and effectively enhances breviscapine's aqueous solubility and gastrointestinal absorption.
• The developed system meets the primary criteria for an oral drug delivery system.
• This research provides a foundational basis for future investigations into breviscapine's therapeutic applications.