Cathartic

[Sarah]

A medicine that promotes alvine discharges; a purge; apurgative of moderate activity.

[Sarah]

deriving from [catharsis]; causing catharsis. Providing relief (of anger, suffering etc.) thru the open expression of strong feelings.

[Justin Bieber]

involving the release of strong emotions through a particular activity or experience:

[Agnes]

Providing psychological relief through the open expression of strong emotions; causing catharsis.