Compounds of 薬になる

• 薬になる
  (exp) to be beneficial (to)
  to do (a person) good
• いい薬になる
  (exp,v5r) to learn a lesson (usu. from an unpleasant experience)
  to be good for someone
• 良い薬になる
  (exp,v5r) to learn a lesson (usu. from an unpleasant experience)
  to be good for someone