How effective is targeted therapy for chronic myeloid leukaemia?

CML is driven by a specific molecular change in many people, and targeted medicines block the abnormal signal associated with that change. The aim is to bring blood counts back towards a healthy range and reduce the measurable molecular signal over time. A blood count can show an early response, while molecular testing gives a more sensitive view of treatment control.

Effectiveness is not judged by one result alone. The team looks at the direction of results, missed doses, side effects, drug interactions, and whether the medicine is being absorbed. If response is slower than expected or the disease changes, further testing can help guide another treatment choice.

Take the medicine consistently and discuss vomiting, swallowing difficulty, or missed doses with the team. Do not add supplements or stop treatment without checking first. Keep appointments for blood counts and molecular tests, even when you feel well, because CML can be controlled without obvious symptoms. Report side effects early so the dose or medicine can be reviewed safely.

Read more about [Chronic Myeloid Leukaemia](/conditions/chronic-myeloid-leukaemia/) and [Targeted Therapy](/treatments/systemic-therapy/targeted-therapy/).

Contact your care team urgently for severe breathlessness, chest pain, fainting, sudden weakness, unusual bleeding, severe abdominal swelling or pain, a persistent fever, or signs of a serious allergic reaction. Seek emergency help for collapse or major breathing difficulty. The team can tell you whether to pause a dose while a symptom is assessed.

What molecular result are we tracking? What response would be expected at my next check? Could any of my medicines interfere with treatment? What symptoms suggest a side effect rather than CML? If this medicine is not tolerated, which alternatives could be discussed? Is a treatment pause ever appropriate for me?