Hi John,
Musculo-skeletal effects of TKi s
If you look at the product literature for many of the TKI s, for some CML patients, there are substantial issues of bone pain,joint inflammation and muscle stiffness or inflammation.. I remember reading an article by Steve O Brien on such issues and indicating that for such conditions scans would produce nothing abnormal so this is a grey area for haematologists where it is difficult to explain the effects of TKIs.What is sure is that a drug like Bosutinib is quite powerful and perhaps not as toxic as some other chemotherapy agents but can be placed in the category of medium toxicity.
Have been on imatinib for nine years and still suffer a lot of musculo -skeletal problems of severe night cramps and very stiff calf muscles and some arthritic joints .A few years ago had an episode of a stiff neck that took over a year to resolve via massage and physio-saw a face and neck specialist who suggested that imatinib was a very powerful drug . Also had a problem with drug interaction (taking an antibiotic for a urinary issue) leading to severe inflammation of the posterior muscle to the hip joint and yes had steroid injections (in Thailand whilst on holiday) which did help a lot but it took a long time to resolve itself.
Currently have an inflamed plantar in the foot and a few months ago had an ultrasound guided Depo injection in the heel but it failed to resolve it.The next steps would be shockwave therapy or finally surgery.We are not sure if the foot issue is related to the tki or not.
As a last resort I am being treated by a Chinese physician with acupuncture and acupressure/reflexology-the good news is that the calf stiffness has gone and there are no more night cramps but the heel is still painful and will need a longer period of treatment.
So I suggest that haematologists will be reluctant and perhaps unable to specify a remedy for tki related musculo-skeletal matters but that orthapedics may suggest steroid injection interventions as solutions.I have asked if steroids given by injection locally or given topically will interact with a tki and it seems the answer is no but a long term course of high dose steroids given orally might need to be reconsidered re drug interaction.
So my experience is variable and it is up to you -the steroid injection might help or you may need some other approach.Probably it will not interact with Bosutinib but you might ask that question.
Wish you well with your treatment
John W