AMELIORATING AGENT OR PROPHYLACTIC AGENT FOR MUSCLE WEAKNESS SYMPTOM IN DISEASE OR SYNDROME ASSOCIATED WITH METABOLIC DISORDER

摘要

The present invention addresses the problem of providing an ameliorating agent or a prophylactic agent for a muscle weakness symptom in a disease or a syndrome associated with a metabolic disorder. The present invention provides an ameliorating agent or a prophylactic agent for a muscle weakness symptom in a disease or a syndrome associated with a metabolic disorder, the agent containing a compound having a morphinan backbone structure typified by the below-mentioned compound or a pharmacologically acceptable acid addition salt thereof as an active ingredient.