Some have you may have spotted this trial result already. It came out a few weeks ago and is reported (as one example) here:
However, what prompted me to post was this review of the trial report, which gives it 5 out of 10. Most significantly it points out the absence of any clinical benefit or even MRI-observable myelin repair.
Still, it may lead to better understanding of what could make myelin repair. But perhaps too early to go out and overdose on antihistamine!