Can Arava taken for inflammatory arthritis cause headaches?

Hello doctor,

I have low-grade inflammatory arthritis. I have awful joint pain but minimal swelling and occasional slight inflammation in blood tests. The RA test is negative. Systemic steroid injection gives massive improvement. My consultant started me on Arava recently. At the same time, I have been weaning myself off Tramadol after being put on this irresponsibly by a pain consultant. Within a couple of days of starting Arava, a background headache began and a few days ago this reached an agonizing peak. The only thing that helped was Aspirin. My BP was raised and my Lisinopril has now been doubled. I stopped the Arava. My current medications are Lisinopril, Simvastatin, Omeprazole, and Duloxetine. The headache is better but still in the background. So, I have the double issue of this and stopping Tramadol. My question is - Is the headache caused mostly by the Arava? And how long should I wait before seeing GP again? My BP is much better. I stress I am prone to migraines in any case.