| abstract |
Provide a therapeutic and / or prophylactic agent for cancer pain that can be administered to a patient for a prolonged period of time from the early stage to the final stage of cancer pain therapy, rather than non-opioid analgesic agents or conventional opioid analgesic agents; The therapeutic and / or prophylactic agent for cancer pain contains, as an active ingredient, a 1,5-benzodiazepine derivative represented by formula (1): (see formula (1)) (where R1 represents an alkyl group of C1-6, R2 represents a phenyl group or a cyclohexyl group, and Y represents a single bond or a C1-4 alkylene group) or a pharmaceutically acceptable salt thereof. |