Final answer:
The statement is false; chemotherapy regimens commonly involve the combination of multiple drugs, known as combination chemotherapy, to improve effectiveness and inhibit drug resistance, despite potentially increased side effects.
Step-by-step explanation:
The statement 'Chemotherapy drugs are often used in isolation of one another to avoid adverse effects' is false. In fact, chemotherapy usually involves the use of multiple drugs in combination, a practice known as combination chemotherapy or polychemotherapy. This approach is taken because different drugs can work synergistically and improve treatment efficacy while also potentially inhibiting the development of drug resistance in cancer cells. Although combination chemotherapy increases the complexity of treatment and can potentially raise the risk of side effects, it is preferred because it typically offers a higher chance of success compared to using single drugs in isolation.
The introduction of the combination chemotherapy principle has turned certain types of cancer from fatal diseases into treatable conditions. Notable successes include treatments for diseases like acute lymphoblastic leukemia (ALL) in children, which, thanks to combination chemotherapy regimens, has become largely curable.