3D-printed tablets using a single-step hot-melt pneumatic process for poorly soluble drugs.

Area of Science:

• Pharmaceutical Technology
• Materials Science
• Drug Delivery Systems

Background:

• Poorly water-soluble drugs present challenges in achieving adequate bioavailability.
• Traditional manufacturing methods may not optimize dissolution for such compounds.
• 3D printing offers novel approaches for customized drug dosage forms.

Purpose of the Study:

• To evaluate a 3D printer with a hot-melt pneumatic dispenser for single-step tablet preparation.
• To assess the impact of excipients and tablet geometry on drug dissolution.
• To investigate the potential for enhancing the dissolution of dutasteride, a poorly water-soluble drug.

Main Methods:

• Utilized a 3D printer with a hot-melt pneumatic dispenser for tablet fabrication.
• Employed dutasteride as a model drug and various bulking agents (Soluplus®, Kollidon® VA 64, Eudragit® E PO, HPC).
• Analyzed physicochemical properties using DSC, PXRD, and TGA.
• Designed diverse tablet geometries to study surface area/volume (SA/V) effects on dissolution.

Main Results:

• The 3D printing process successfully converted solid dutasteride into an amorphous state, which was stable under accelerated storage.
• Kollidon® VA 64 significantly enhanced dutasteride dissolution, achieving >80% release in 15 minutes.
• Tube-shaped tablets, possessing the highest SA/V ratio, demonstrated the fastest drug dissolution compared to other shapes.

Conclusions:

• A hot-melt pneumatic dispenser 3D printer is effective for single-step preparation of amorphous drug dosage forms.
• The amorphous state achieved through 3D printing significantly improves the dissolution of poorly water-soluble drugs.
• Tablet geometry, specifically SA/V ratio, plays a crucial role in modulating drug dissolution rates.