Chemotherapy (sau da yawa ana rage shi zuwa chemo kuma wani lokacin CTX ko CTx )ya kasan ce kuma wani nau'in maganin ciwon daji ne wanda ke amfani da magungunan cutar kansa ( magungunan chemotherapeutic ) Sun Kasan ce a matsayin daidaitaccen tsari na chemotherapy . Ana iya ba da ilimin chemotherapy tare da niyyar mai warkarwa (wanda kusan koyaushe ya ƙunshi haɗaɗɗun magunguna), ko yana iya nufin tsawaita rayuwa ko rage alamun bayyanar cututtuka ( palliative chemotherapy). Chemotherapy yana ɗaya daga cikin manyan nau'o'in ilimin likitanci musamman wanda aka keɓe don maganin pharmacotherapy don ciwon daji, wanda ake kira. Kalmar chemotherapy ta zo ne don nuna rashin takamaiman amfani da guba na cikin salula don hana mitosis (rarrabuwar tantanin halitta) ko haifar da lalacewar DNA, wanda shine dalilin da ya sa hana gyaran DNA na iya ƙara ilimin chemotherapy. Ma'anar kalmar chemotherapy ta ƙunshi ƙarin zaɓaɓɓun wakilai waɗanda ke toshe siginar siginar salula ( sigina ). Haɓaka hanyoyin kwantar da hankali tare da takamaiman ƙwayoyin ƙwayoyin cuta ko ƙwayoyin ƙwayoyin cuta, waɗanda ke hana sigina masu haɓaka haɓakawa daga ingantattun ƙwayoyin cuta na endocrin (musamman estrogens don ciwon nono da androgens don kansar prostate) yanzu ana kiran su hanyoyin kwantar da hankali na hormonal.