First - THANK YOU all for your input on this
Fortunately my itching is not as bad as some of you reported. - PHEW! but nonetheless very aggravating.....
I talked to my Haematologist and he declined to recommend an increase in my Fexofenadine dosage or an alternative and referred me back to my GP whose pharmacist insisted I could ony switch from 2 x 120mg to 1x180mg Fexofenadine per day. - FAIL
He stated for the second time (as he did years ago) that all of my (believed to be Hydroxy) side effects could be the ET itself. - FAIL
He set up an appointment to clear me for a switch to Ruxolitinib (loads of paperwork full of side effects) but would I simply be swapping one set of side effects for another ? Or as he posits still have the side effects anyway. And I have a face-to-face appointment scheduled (shock!!)
Anyway I am now using Beta Alanine that seems to be working - fingers crossed !!!!