Hi
I am on embrel for PA, been on it 5 weeks now and not much improved. I started having site reactions after my third injection and like you the reaction comes about 2 days after injecting. I have red patches on my thighs which after a couple of weeks fade, started injecting into my stomach and they are reacting now to, itch like mad, been to gp today and he had given me some cream.
Hope you see some improvement soon, but if this fails you can try other anti tnf drugs rather than go back on mtx which is a drug I will never go back on..
Good luck
Macs XX