くすり いい薬になる Show inflections LinksSentence search for いい薬になるSentence search for いいくすりになるSentence search for 良い薬になるKanji details for 薬Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending1. to learn a lesson (usu. from an unpleasant experience); to be good for someoneOther forms良い薬になる 【いいくすりになる】 Discussions Log in to talk about this word.