Therapeutic agent for pain

摘要

Disclosed is a therapeutic and/or prophylactic agent for cancer pain, which can be administered continuously for a long period between the early stage and the final stage of the cancer pain therapy in place of conventional non-opioid or opioid analgesic agents. The therapeutic and/or prophylactic agent for cancer pain comprises a 1,5-benzodiazepine derivative represented by general formula (1) [wherein R