You are here

Highly sensitive to Imatinib

Categories:

I've been on Imatinib 400mg since mid July 2017 (diagnosed with CML in Chronic Phase on June 6, 2017). 

I have been on leave from work since the end of July because of the crippling fatigue, daily headaches and brain fog. My consultant has finally decided that I'm intolerant and plans to change me to Nilotinib. I was wondering if those on the Nilotinib (Tasigna) wagon could tell me more about it.

I'm 31 and CML has taken over my life. I feel like I should be thankful for TKIs over Interferon Alpha treatment, but when leaving the home for as little as an hour makes me so ill I'm in bed for two days, I can't help but curse my luck. I call the Imatinib "the evil tablet", as its side effects have severely impacted my quality of life. 

Any help or light at the end of the tunnel is much appreciated. 

Hi Melanie,

I'm sorry to hear you're having all those problems. That sounds really hard to manage.

People's reactions to different TKIs seem to be very individual. So what works for one person may be awful for the next. At least we are lucky to have many TKIs on the market, so with some experimentation it is often possible to find a TKI which is more "compatible" with you.

Nilotinib has, of course, its own set of side effects. But it's really impossible to predict which of them (if any) you could end up with. But it imatinib is so bad for you now, then it sounds like giving it a try is the best course of action.

David.

Hi Melanie

Research as shown that the serum concentration of imatinib can vary widely for patients - by a factor of 10X or more. It may that you are someone who has a very high level, which may be more than  you need to get a therapeutic dose in your system.  Kings College Hospital provide a service to UK NHS to check blood levels - their web page is here.

It might be worth asking your consultant about this

Would not surprise me if you are on too high dosage. Do get the serum test done...I believe it tests the residual ammount of tki in your system at 24jrs

re you generally sensitive to medication? Meaning does a lower dose of meds work for you?

I have a generally good time with Imatanib 400mg but feel like it's still a bit much. I was on Tasigna twice (higher dose second time and I really felt that was too much)

I just took the trough level for imatinib.  I am on 400 mg and my trough is 1685 taken 23 1/2 hours after my last dose.  I wonder if my trough is a bit high and I would do well to take less imatinib and have less side effects.  I have only been on the drug for a month and I am suffering many side effects, thus I think it is a “wait and see”.  It is something you may want to consider.

Melanie - My experience with imatinib was like yours.  I never had a happy day again after the very first Gleevec pill (400 mg).  Well, except for a brief stoppage, a couple of weeks in which my former self returned like magic.  I was "better" at 300 mg and 200 mg, but those were very brief times and I was told they had to be temporary, that 400 mg was the proper dose and I would absolutely have to get back to it.  So, I struggled mightily for 2 years, sick ALL the time, depressed (like, stay-in-bed-all-day, can't-stop-crying kind), face disfigured by edema, all the while being told I was "doing great."  The help for me came in the form of changing doctors, to a nationally known CML specialist an hour away, and a change in drug to Sprycel.  Every aspect got better - not perfect - but so, so much better.  My first doctor knew only Gleevec, had only a few CML patients (this was 2009), and kept insisting that "most people tolerate the drug very well."  He thought I looked and seemed fine (since I wore makeup to my appts and don't make a habit of breaking down in public).  His words didn't cheer me up; they had the opposite effect - I felt unheard and invisible - plus he couldn't give me any concept of a light at the end of the tunnel.  I kept asking, when will the side effects let up?  No answer.  The test for how much Gleevec is in your system was, apparently, not accurate then, and nobody suggested that maybe I was on too much drug, for me.  Anyway, if I had known then what I know now, I would've asked for that test and maybe I could've stayed on Gleevec at a lower dose.  Who knows. 

After reading posts since about 2010 (on the US site), I think the universal CML patient story is:  massive and unnecessary initial confusion, anxiety, fear, and actual illness that eventually, with self-education and efficacy, gives way to some enlightenment and relief.  Trouble is, it usually takes months and years to get there.  And, largely, you have to do it all on your own.  I think a very, very great deal of distress could be avoided with better initial care and counseling.  I think we've come a long way on the flexibility in dosing, and yet here you are, Melanie.  Thank goodness for the two forums - I can say, unequivocally, that I have learned more from them (and my own internet research) and received more comfort and solutions from them than I ever have from my doctors. 

I was the same way and I took Tasigna but couldn't stay on it I felt worse than the Gleevec. I had a rash all over and I work in the sun so it got way worse and I couldn't take the itching and so I went back on Gleevec. I feel the same way I'm depressed and never want to leave the house and the only time I feel half way normal is if I drink a 6 pack of beer . I have the crazy bone pain from Gleevec and it never goes away seems like the longer I'm on Gleevec the more bone pain I get . I'll take the crazy bone pain though over all the side effects I got from Tasigna . Like Kat73 said try Sprycel and maybe that will work for you. I may talk to my doctor and Try Sprycel because this bone pain is just nuts . I can barely walk today and yes my Oncologist does the same thing he acts like I'm telling him a story except for when his Nurse yelled at him because she seen me take a step down from the weight scale and the scale is only 4 inches off the ground and I had to grab the table next to it because I was falling down because of the pain and my ankles were giving out because of the pain in my bones.