Carnauba wax as a promising excipient in melt granulation targeting the preparation of mini-tablets for sustained release of highly soluble drugs

Highlights

• Carnauba wax was exploited as a novel excipient for melt granulation.

• Melt granulation improved tabletability and flowability of both captopril and metformin HCl.

• Sustained release of captopril was achieved by Ethocel™ at a 50% (w/w) concentration.

• Sustained release of metformin HCl was reached by film-coating (Kollicoat® SR 30D: Opadray® II).

• Carnauba wax assisted sustaining the drug release in conjunction with the polymers.

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