Amorphous isradipine nanosuspension by the sonoprecipitation method

Area of Science:

• Pharmaceutical Technology
• Materials Science

Background:

• Limited research exists on formulating isradipine using nanoparticle engineering.
• Enhancing drug dissolution is crucial for improving therapeutic efficacy.

Purpose of the Study:

• To enhance and elucidate the mechanism of isradipine dissolution using the sonoprecipitation method.
• To develop stable isradipine nanosuspensions through nanoparticle engineering.

Main Methods:

• Nanosuspensions were prepared via sonoprecipitation, varying ultrasonication amplitude and time.
• Dissolution testing was conducted using the USP paddle method in intestinal fluid (pH 6.8).
• Analysis included crystalline structure, molecular interaction, morphology, and particle size.

Main Results:

• The sonoprecipitation method, particularly with HPMC 6, demonstrated significant potential for enhancing drug release.
• Stable nanosuspension formation was critically dependent on ultrasonication amplitude and time, influencing nanoparticle size.
• Reduced drug crystallinity and optimized particle size synergistically increased the isradipine dissolution rate.

Conclusions:

• Sonoprecipitation is a viable method for creating stable isradipine nanosuspensions with enhanced dissolution.
• Ultrasonication parameters critically control nanoparticle size and stability, impacting drug release.
• This approach offers a novel strategy for improving the dissolution rate of isradipine.