Film coating

A film coating is a thin polymer-based coat applied to a solid dosage form such as a tablet. The thickness of such a coating is usually between 20-100 µm.

Film coating formulations usually contain the following components:
 * 1) Polymer
 * 2) Plasticizer
 * 3) Colourant
 * 4) Opacifier
 * 5) Solvent
 * 6) Vehicle

Functionality wise it is further divided into:


 * 1) Immediate release coating
 * 2) Sustained release or modified release coating
 * 3) Enteric release coating