TETRAPYRROLE DERIVATIVE, AND USE THEREOF FOR MEDICAL PURPOSES

摘要

[PROBLEMS] To provide an agent for preventing a diabetic neuropathy, which does not induce any hypotensive effect or hyperkalemia. [MEANS FOR SOLVING PROBLEMS] Disclosed is an agent for preventing a diabetic neuropathy, which comprises a tetrapyrrole derivative represented by the general formula (I) or a pharmaceutically acceptable salt or ester thereof as an active ingredient.