Just been having a look around the internet, my anti histamines don't seem to be reducing the itch much at the moment and have found this:
Oral antihistamines. Your doctor may recommend anti-allergy medications to ease your itch. This group of medications includes over-the-counter drugs that don't make you sleepy, such as cetirizine (Zyrtec) and loratadine (Claritin), or those that make you sleepy, such as diphenhydramine (Benadryl). The ones that make you sleepy can be particularly helpful at night if your itchy skin keeps you awake. (Taken from the Mayo Clinic page in answer to a search of cure an itchy skin)
I was thinking about those of us who itch more so at night and rarely get a good night. It may be worth asking your specialist. Claritin did not work for me but I might give benadryl a go. Now that I am retired the tiredness and work place no longer clash.
Has anyone tried any of these products with success?