Hi Kabelladonna. I have Ankylsoing Spondylitis, Crohn's Disease, Psoriasis and Hashimoto's Thyroiditis. I'm also expecting to have Fibromyalgia added to the list soon.
There is a family of arthritic conditions called Spondyloarthritis. Psoriatic Arthritis is one of them. Others are Reactive Arthritis, Ankylosing Spondylitis, Undifferentiated Spondylitis, Juvenille Spondylitis, Enteropathic Enteritis, and so on. All of these present similarly and pose similar risks in terms of disease progression and are essentially treated the same.
I am currently using Humira every week becaue the normal dose every two weeks was just not enough. We know that we need to add an additional immunosuppressant, but I've refused MTX because I'd like to get pregnany soon. For now, I'm taking pred, but that's a low dose for a short period. By Sept I'll either be on Imuran or 6MP.
The Spondylitis Association of America has great articles about PA and I'd suggest you do some reading there. I've tried, but can't link this page with an active link. You'll have to copy and paste it into your browser window.
http://www.spondylitis.org/about/psoriatic.aspx
I also have a post up here about early Dx of the Spondyloarthris group. It might be worth it for you to read it and see where you might fit in. It gives flowcharts and decision trees along with probability charts based on symptom groups.
The only problem that I've had after beginning these meds is a few run ins with sinus infections. Here, I will have to admit that those were most likely caused by pre-existing sinus problems that I failed to stay on top of. If I had taken care of them, they might not have gotten so badly infected. Other than that, I've had a cold here or there, but nothing serious to worry about. I even travel on the NYC subway and don't worry about catching anything. I am however very careful about handwashing. I do not touch my face without washing my hands ever.
I've heard that the MTX pills can be rough on your stomach and so many choose to use the injection, but everyone reacts to this differently. You'll have to see how it goes. Usually, the Docs also script or at least suggest that you take additional Folic Acid too. That's important. It can help to combat side effects like drowsiness and hair loss. Also, these side effets tend to fade once you adjust to the med.
I hope this brings you quick relief.