Fast dissolving β-lapachone particles and tablets: an approach using surface adsorption technique.

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Natural Product Chemistry

Background:

• β-lapachone (βLAP), a natural compound, shows potent antichagasic activity by generating free radicals and inhibiting nucleic acid and protein synthesis.
• Key challenges for βLAP development include its low water solubility and the need for large therapeutic doses.
• Overcoming these limitations is crucial for effective Chagas disease treatment.

Purpose of the Study:

• To enhance the limited dissolution rate of β-lapachone (βLAP).
• To achieve this by promoting spontaneous crystalline growth of βLAP on an inert excipient surface.
• To develop improved oral dosage forms of βLAP.

Main Methods:

• Physicochemical characterization of βLAP-adsorbed particles.
• Assessment of drug dissolution rates for adsorbed particles, raw drug, and physical mixtures.
• Evaluation of βLAP-adsorbed particle utility in directly compressed tablets.

Main Results:

• Spontaneous crystalline growth of βLAP on microcrystalline cellulose (MCC) resulted in particles with fast dissolution rates (90% dissolved within 50 minutes).
• No physical or chemical instability of βLAP was observed post-adsorption.
• Direct compression into tablets maintained good dissolution behavior with appropriate pressure.

Conclusions:

• Surface adsorption is a simple method to produce βLAP powder with enhanced dissolution.
• This technique facilitates the development of βLAP tablets for improved oral administration.
• The findings offer a promising strategy for developing effective oral Chagas disease therapies.