"Purging cassia" sunan gama-gari ne na tsiro da aka sani a kimiyance kamar Cassia angustifolia, wanda asalinsa ne a Arewacin Afirka da Gabas ta Tsakiya. Ana kuma san shukar da wasu sunaye na kowa kamar Indiya senna, Tinnevelly senna, da Alexandria senna.Kalmar "tsarkakewa" tana nufin ikon shukar don yin aiki a matsayin laxative na halitta, wanda aka yi amfani da shi don yin amfani da shi. ƙarni a cikin maganin gargajiya don magance maƙarƙashiya da sauran matsalolin narkewa. Ganye da kwas ɗin shukar na ɗauke da sinadarai da aka fi sani da anthraquinones, waɗanda ke motsa tsokoki a cikin hanji don yin kwangila tare da haɓaka motsin hanji. abubuwan sha a matsayin wakili na ɗanɗano kuma azaman wakili mai canza launin halitta don yadi. Duk da haka, yin amfani da shi a yawan allurai na iya haifar da illa kamar ciwon ciki, gudawa, da rashin ruwa, kuma ba a ba da shawarar yin amfani da shi na dogon lokaci ba tare da kulawar likita ba.