Preventive or therapeutic agent for neuropathic pain associated with Guillain-Barre syndrome

摘要

A P2X4 receptor antagonist such as paroxetine or a diazepinedione derivative represented by the following general formula (IX) is used as a preventive or therapeutic agent for neuropathic pain associated with Guillain-Barre syndrome. (Wherein R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, R2 and R3 represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, etc., R4 and R5 represent a hydrogen atom and the like, W represents a 5- or 6-membered heterocyclic ring containing 1 to 4 nitrogen atoms as a ring constituent element which may have a substituent.