A diazepinedione derivative represented by the formula (I) or a pharmacologically acceptable salt thereof is used as a P2X4 receptor antagonist:wherein R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or the like, R2 and R3 represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a halogen atom, or the like, R4 and R5 represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or the like, and W represents tetrazole or the like.
