Yes, I have been given a course of Retuximab (as it is spelled here in UK).
My case is different to yours, so I think I first need to explain something.
I suffer from MCTD/Lupus. This disease led to my first renal failure in 1971.
I was then diagnosed in 1972 with chronic proliferative glomerulonephritis.
Without Dialysis my GFR slowly recovered to ~40% and remained stable until about 12 years ago,
when another major (untreated) MCTD/Lupus-flare-up triggered a decline in my kidney-function.
My GFR reduced to about 15% and at this point I had to make a decision.
Because of other major complications to my health caused by untreated MCTD/Lupus-flare-ups
my age and my frailty, it would be unlikely for me to survive Dialysis and extremely doubtful
that I would be given a transplant (I already had suffered a stroke), which I probably would not survive anyway.
Therefore, my only option was to halt or slow down my decline in kidney-function.
In desperation I sought advice and I was told that if the cause of the decline in my kidney-function
was due to an MCTD/Lupus-flare-up, a course of Retuximab-Infusions might kill the B-cells
which were responsible for my flare-up.
This treatment was preceded by Corticosteroid-Infusions.
I was not made aware there would be any side-effects, though I was aware myself
that these heavy treatments could cause side-effects.
It is important you appreciate the desperate situation I was in,
because in 2007 I was (again) given only six months before I would be on Dialysis.
It seemed I really had no choice but to try and halt the decline in my kidney-function.
Because I also suffer from multiple drug-intolerance I had to be very careful.
The preliminary infusions of corticosteroids had to be halted quickly, because of my body’s reactions.
I tolerated the Retuximab-Infusions at first, but as the weeks went by,
I suffered more and more from constant MCTD/Lupus-flare-ups,
which the Retuximab had triggered and which manifested in a variety of ways,
one after the other and these got worse as the months went by.
The Retuximab did kill the B-cells, but, as can happen in few cases of MCTD/Lupus,
it did not stop the progression of the decline in my kidney-function.
So, Retuximab did not work in my case and I was left with terrible side-effects
in the form of constant MCTD/Lupus-flare-ups, one after the other.
This was my last attempt to stop my kidney-decline by medical intervention.
From there I concentrated more and more on diet and life-style.
Only later did I find out that Retuximab can cause very severe problems,
so I count myself very lucky that I came through this treatment
and the subsequent MCTD/Lupus-flare-ups it caused,
with my basic health still intact to live to fight another day.
By careful study of my diet and life-style I have managed to slow down remarkably
the decline in my kidney-function which has remained fairly stable
fluctuating pre-Dialysis between 10-12% kidney-function for over two years now.
Of course, one could say this might have happened anyway, but I don’t think so.
I feel my diet and life-style has brought about a control in the decline of my kidney-function,
which I could not otherwise have achieved.
It is everyone’s choice how they go about their life
and one has to weigh-up at the time what seems to be the route to take.
Retuximab, it is said, is a powerful treatment which can help some people,
but not others, and be assured this powerful treatment does have powerful side-effects.
Best wishes and good luck from Kristina.