甲こうの薬くすりは乙おつの毒どく

expression

one man's meat is another man's poison

Proverb meaning what benefits one person may harm another; literally 'A's medicine is B's poison'.

• 彼かれにはいいアドバイスでも、私わたしには合あわない。まさに甲こうの薬くすりは乙おつの毒どくだ。

  Even good advice for him doesn't suit me. It's truly a case of one man's meat being another man's poison.