<unk> s (or "antitumor antibiotics", or "noncovalent DNA-binding drugs", or "cytotoxic antibiotics", see also neoplastics) are drugs that inhibit and combat the development of tumors.
In the Anatomical Therapeutic Chemical Classification System, they are classified under L01D.
Antineoplastic
Malignant
Oncogenic
Pedunculated
Mosaic 
Carbromal
Geothermal
Liquid