Other treatments for Behcet's
I don't see many people here mention that they've been on Trental (pentoxifylline) for Behcet's ulcerations, arthritis, and fatigue. It's inexpensive and has mild anti-TNFa properties like the biologics (Enbrel, Remicade, Humira, etc.), with fewer side effects and little risk. Low-dose nicotine patches can also work well for oral/skin ulcers - see the research.
There are other prescriptions useful for specific Behcet's symptoms that I don't see used often in the U.K., probably because physicians are unaware or uneducated in their use and effectiveness. Colchicine often doesn't work in Western patients and can cause lots of GI side effects. Prednisone should be reserved for aggressive flares, not as a continuing medication in most patients. Methotrexate can help symptoms and it's cheaper than biologics.
It's common for Behcet's patients to need other drugs too: anti-depressants to help manage mood and pain; stomach acid meds; anti-nausea drugs; NSAIDs, migraine meds; topical hydrocortisone; viscous lidocaine, etc. Most important on top of all this? Rest, and lots of it.