| abstract |
Provided is a medicinal drug for treating or preventing rheumatoid arthritis. As a medicinal drug for treating or preventing rheumatoid arthritis, the present invention uses, as an active ingredient, a compound that has an effect of blocking the T-type calcium channel (Cav3.2 channel) and that is represented by any one of general formulae (I)-(VI), a tautomer, a stereoisomer, or a pharmaceutically acceptable salt of the compound, or a solvate thereof. |