What is the concept of dose de-escalation in response to toxicity?

• A. Reducing dose or delaying cycles to allow recovery while attempting to preserve efficacy
• B. Increasing dose to overcome resistance
• C. Shortening cycle but increasing frequency
• D. Switching to radiotherapy

Answer: (A)

Dose de-escalation means adjusting treatment when toxicity appears by lowering the amount given per cycle or by delaying subsequent cycles to allow recovery, with the aim of preserving as much anti-tumor effect as possible while reducing harm. By reducing dose or increasing recovery time, the body has a better chance to bounce back from side effects such as low blood counts or organ toxicity, and clinicians can maintain treatment in a safer, more tolerable way. If tolerated, the plan may be adjusted later to reintroduce doses or shorten the delay, trying to keep the overall effectiveness while keeping safety front and center. Increasing the dose to overcome resistance would raise toxicity and isn’t about reducing exposure. Shortening the cycle but increasing frequency changes the scheduling in a way that can raise cumulative exposure rather than lower it. Switching to radiotherapy is a different treatment modality altogether, not a dose adjustment within the same therapy.