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Merck

Technology evaluation: Kollicoat IR.

Expert opinion on drug delivery (2011-03-23)
Ehab A Fouad, Mahmoud El-Badry, Steven H Neau, Fars K Alanazi, Ibrahim A Alsarra
ABSTRACT

Developments in industrial pharmacy are often linked to the discovery of pharmaceutical excipients. Although recently introduced as a material for immediate release coatings, Kollicoat IR already has other applications. In this review, the different properties and pharmaceutical applications of Kollicoat IR as an excipient are discussed. In the first part, the chemical structure and the physicochemical characteristics are examined. The second part is a presentation of the available Kollicoat IR products followed by a brief overview of the preclinical studies completed for its use as an instant release coating material. Although the polymer was intended as an immediate release coating material for tablets, grafting PEG with polyvinyl alcohol to form this polymer provides physicochemical properties that lead to ever-broadening applications. Understanding its properties can lead to the development of a new use for Kollicoat IR. The addition of Kollicoat IR to an ethylcellulose or polyvinyl acetate tablet coat was successful at modifying the drug release rate. Designing a successful controlled release coat simply requires acknowledgment of the drug release mechanism from the mixture of polymers that includes Kollicoat IR. Moreover, the interaction between Kollicoat IR and poorly soluble drugs produces fast-dissolving solid dispersions prepared using hot stage extrusion, spray drying, or freeze drying.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Poly(vinyl acetate), average Mw ~500,000 by GPC
Sigma-Aldrich
Poly(vinyl acetate), average Mw ~100,000 by GPC, beads
Sigma-Aldrich
Kollicoat® SR 30 D, 28.5-31.5% solids basis
Poly(vinyl acetate) dispersion 30 per cent, European Pharmacopoeia (EP) Reference Standard