cathartic

/K AH0 TH AA1 R T IH0 K/
noun
  1. 1

    A laxative.

adjective
  1. 1

    Purgative; inducing (mental or physical) catharsis

  2. 2

    That releases emotional tension, especially after an overwhelming experience

Source: https://en.wiktionary.org/wiki/cathartic