Pharmaceutical preparation having excellent photostability and drug release properties

摘要

The present invention provides a preparation which remains substantially uncolored even when irradiated with light, by coating a preparation containing the compound represented by formula (I), a salt of said compound, or a crystal of these compounds with a photostable substance and a polymer molecule, using, in particular, at least one substance from among titanium oxide and talc as the photostable substance and hypromellose as the polymer molecule.