Psoriasis and other chronic illnesses

[Kpthenut]

I've been looking at what treatments are available. I'm not sure about any of the oral meds. 

I have 2 chronic illnesses. An underactive thyroid for which I take 175mg thyroxine, I have been this under control and don't think it would be affected. 

I also have ulcerative colitis which is inflammation of the colon. I struggle to get keep it under control and it appears most of the oral meds can cause diarrhoea so I can think I'd have problems. 

Does anyone else have similar x