Chemotherapy before 3pm improves survival, study finds

6 February 2026

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By Daniel Pye

Receiving chemotherapy earlier in the day to align with the body’s circadian rhythms improves survival, a significant study has found.

More than 200 Chinese patients with stage 3C-4 lung cancer were randomly assigned into groups that received infusions either early or late in the day, measured as either before or after 3pm.







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