Chemotherapy
Drug therapy aimed at killing cancer cells but also kills healthy cells
Discovered in WW1 and common usage after WW2
Systemic so works all over the place
Different modes of administration
Significant side effect profile
Can be given in single therapy or combination therapy regimes 
Can be used for curative or palliative intent 
Palliative treatment focused on reducing symptoms of cancer 
Attacks rapidly producing cells including healthy cells like bone marrow, hair, skin, mouth and gut cells

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