Analgesic agent comprising a cyclobutanedicarboxylic acid derivative

摘要

An analgesic agent is provided which has analgesic action and anti-inflammatory action without significant side effects found in conventional analgesics. The analgesic agent comprises as an active ingredient a cyclobutanedicarboxylic acid derivative, containing substituted diphenyl, represented by formula (I): wherein X1, X2, Y1, Y2, Z1, and Z2, which may be the same or different, each independently represent a hydrogen atom, hydroxyl, a halogen atom, alkyl, alkoxy, or a nitrogen-containing group; and R1 and R2, which may be the same or different, each independently represent hydroxyl, a halogen atom, alkoxy, aryloxy, terpeneoxy, saccharide, or a nitrogen-containing group.