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Treatment-free remission: who can try stopping a CML tablet | CION Cancer Clinics
You may be able to try stopping a TKI only if your CML has stayed in chronic phase, you have taken a TKI for at least three years, and BCR-ABL has stayed very low for at least two years. The attempt is planned and watched by your haematologist with frequent blood tests. If the level rises, the tablet is restarted. Never stop on your own. At CION Cancer Clinics, every leukaemia, MDS and MPN case is reviewed by our haematologist and discussed at a tumour board before a plan is agreed.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- Who can try stopping a TKI for treatment-free remission?
- What do haematologists usually look for before an attempt?
- Who is an attempt usually not suited to?
- How does a supervised attempt usually run?
- How might you feel after the tablet is stopped?
- What do people get wrong about stopping a TKI?
- Which report terms matter for stopping?
- Common questions about stopping a TKI
The short answer
Who can try stopping a TKI for treatment-free remission?
You may be able to try stopping only if your CML has stayed in chronic phase, you have been on a TKI for at least three years, and your BCR-ABL has stayed very low for at least two years. The attempt is always planned and watched by your haematologist, with frequent blood tests. It is never something to try on your own.
What treatment-free remission means
Remission here means the leukaemia stays controlled at a very low level on your blood tests. Treatment-free remission means it stays that way after the tablet is stopped. It does not mean the CML is gone for good. A small number of leukaemia cells usually remain, and in some people they are kept quiet without medicine.
Why it is worth discussing
Years of daily tablets bring side effects, cost and worry about supply. For a young woman, it may open the way to planning a pregnancy. For many families, it lifts a monthly expense. Those are good reasons to ask. But the attempt only makes sense if you can get reliable, frequent BCR-ABL tests, because those tests are what keep it safe.
Why the time rules are strict
The three-year and two-year rules come from the studies where stopping was tested safely. People who stopped earlier, or with a shallower response, saw the leukaemia return more often. Your haematologist may ask you to wait a little longer than the minimum. That is caution, not a refusal, and it usually improves your chances of staying off the tablet.
If the level rises after stopping, the tablet is restarted. For most people who restart promptly, control returns. This is why close testing matters more than anything else.The usual checklist
What do haematologists usually look for before an attempt?
- CML that has only ever been in chronic phase
- At least three years on a TKI
- A deep molecular response, BCR-ABL at or below 0.01%, held for at least two years
- No history of resistance to a TKI
- A lab that reports BCR-ABL on the international scale with a sensitive test
- Your willingness to come for frequent blood tests, without missing any
- A clear plan to restart quickly if the level rises
Not sure whether this applies to you?
Ask an oncologistReasons to wait
Who is an attempt usually not suited to?
These are not failures. They are reasons the risk of stopping outweighs the benefit, for now or for good.
Past accelerated or blast phase
If your CML ever moved beyond chronic phase, stopping is generally not advised, because the disease has shown it can progress.
Resistance or a mutation
If you have needed a switch because BCR-ABL was not falling, or a resistance mutation was found, the leukaemia is harder to keep quiet without tablets.
A response that is not deep or steady
Results that go up and down, or a response that has not yet been deep for long enough, usually mean waiting and trying later.
Testing you cannot keep up
Living far from a reliable lab, or being unable to attend frequent tests, makes a rise hard to catch in time.
Worth asking about
- Sample collection nearer home
- How fast results come back
Step by step
How does a supervised attempt usually run?
A planning visit
Your haematologist reviews every BCR-ABL result, your history and your goals, and explains the testing plan and the restart rule in writing.
The tablet is stopped on a set date
Only on your haematologist's instruction. Some doctors lower the dose first; that is their decision, never yours.
Frequent BCR-ABL tests
Tests are done every month in the early period, when most rises happen, then less often if the level stays low.
Restart if needed
If BCR-ABL rises above the agreed line, the tablet is restarted promptly and response is checked again.
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What to expect
How might you feel after the tablet is stopped?
Some people feel better within weeks, as tablet side effects fade. Others notice new aches in their muscles and joints, sometimes in the shoulders, hips or back. This is called TKI withdrawal syndrome.
Withdrawal aches are common and usually settle
The aches come from coming off the tablet, not from the leukaemia returning. They often ease over the following months. Tell your haematologist, who can suggest safe pain relief. Do not restart the tablet on your own to make them go away.
The emotional side
Many people find the waiting between tests harder than taking the tablet ever was. Each result can feel like a verdict. It helps to know in advance what will happen if a level rises: the tablet is restarted, and most people regain control. Talk to your family about this plan before you begin, so a rise does not feel like a crisis.
What does not change
You still need to tell every doctor, dentist and chemist that you have CML. You still keep every report in one folder, in date order. And you still call your haematologist if you notice new tiredness, unusual bruising, fevers or a swelling under the left ribs, rather than waiting for the next test date.
Commonly believed
What do people get wrong about stopping a TKI?
"If my report is undetectable, I can stop myself."
Never. An undetectable result on one test is not the same as the steady, long, deep response the checklist needs. Stopping without a testing plan can let the leukaemia rise unnoticed.
"Stopping successfully means the CML has been removed."
It means the leukaemia is being held down without tablets. Blood tests continue for the long term, because a late rise can still happen.
"If it comes back, the tablet will not work again."
For most people who restart promptly under close monitoring, the same tablet brings BCR-ABL back down.
"Everyone on a TKI long enough should try stopping."
Many people are not suited, and some choose to stay on their tablet. Both are reasonable decisions made with your haematologist.
On your report
Which report terms matter for stopping?
- IS (international scale)
- A standard way labs report BCR-ABL, so results compare across labs and over time.
- MMR or MR3
- Major molecular response: BCR-ABL at or below 0.1%. Often the line for restarting after stopping.
- MR4 and MR4.5
- Deeper responses, with BCR-ABL much lower still. A deep response is needed before an attempt.
- Undetectable
- No BCR-ABL found by that test. It depends on how sensitive the test was.
- TFR
- Treatment-free remission: CML controlled without tablets.
Questions we are asked
Common questions about stopping a TKI
Can I stop imatinib if my BCR-ABL is undetectable?
Not on your own. One undetectable result is not enough. Your haematologist looks at how long you have been on a TKI, how long the response has been deep and steady, your disease history, and whether frequent reliable testing is possible. If all fit, a supervised attempt can be planned together.
Does it matter which TKI I am on?
Attempts have been studied after imatinib and after second generation tablets. The tablet name matters less than how deep and steady your response has been. Your haematologist will look at your full treatment history, including any switches and why they happened.
How often are blood tests needed after stopping?
Very often at first, usually every month in the early period, when most rises happen. If the level stays low, tests become less frequent but continue for the long term. Your haematologist will give you a written schedule. Missing tests is the main thing that makes an attempt unsafe.
What if my BCR-ABL rises after stopping?
If it crosses the agreed line, your haematologist restarts the tablet. For most people this brings the level back down. A rise is not an emergency, but acting on it promptly is important, so make sure you know whom to contact when a result comes back.
Can I try again if the first attempt does not work?
A second attempt is sometimes considered after a long period back on treatment with a deep response again. The evidence for second attempts is smaller. Your haematologist can tell you whether it is worth discussing in your case.
I want to have a baby. Is stopping the way to do that?
It can be one route for some women, planned well ahead with your haematologist and a pregnancy specialist. It needs a deep, steady response first. Never stop a TKI because you have found out you are pregnant without speaking to your haematologist the same week.
Will I save money by stopping?
You stop paying for tablets, but frequent BCR-ABL tests have their own cost, especially early on. Ask whether Aarogyasri, PM-JAY, CGHS, ECHS, EHS or your insurer covers monitoring tests, and check the current rules, which change.
Is it safer just to stay on the tablet?
For many people, staying on a tablet that works and is well tolerated is a perfectly good choice. Stopping is an option, not an expectation. Talk through side effects, cost, plans and your feelings about monitoring with your haematologist, and decide together.
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Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Sources
- Leukemia & Lymphoma Society — Chronic Myeloid Leukemia
- American Cancer Society — Chronic Myeloid Leukemia (CML)
- National Cancer Institute — Chronic Myeloid Leukemia Treatment (PDQ) - Patient Version
- Blood Cancer UK — Chronic myeloid leukaemia (CML)
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
What Happens If CML Comes Back After StoppingWhat a rise means and how restarting worksMajor Molecular Response ExplainedThe response level used as the restart lineReading Your BCR-ABL Report and the IS ScaleHow to read the results that guide stoppingPregnancy and Fatherhood on a TKIFamily planning while on or off a TKI
Talk to us
Wondering whether you could try stopping?
Share your BCR-ABL results with us. CION's haematology team will go through the checklist with you and explain what a supervised attempt would involve.