Cathartic

ca⋅thar⋅tic
   /kəˈθɑrtɪk/ Show Spelled Pronunciation [kuh-thahr-tik] Show IPA Pronunciation
–adjective
1. of or pertaining to catharsis.
2. Also, ca⋅thar⋅ti⋅cal. evacuating the bowels; purgative.
–noun
3. a purgative.

eg:

the pau bitch gave me cathartic paus which resulted in a terrible morning, the next day, filled with shit, fluids and bad farts.