An object of the present invention is to provide a drug which is effective for prophylaxis or therapy of peripheral nerve disorder occurred as a side effect of the administration of anti-cancer agents. The present invention is to provide a drug containing an ester of C 10 fatty acid as an active ingredient for prophylaxis or therapy of peripheral nerve disorder induced by administration of a drug containing at least one of anti-cancer agents. The drug of the present invention containing the compound as an active ingredient is highly useful as a drug for prophylaxis or therapy of peripheral nerve disorder induced by administration of anti-cancer agents.
