There are several TNF blockers that can be used and Stelara isn't the only one. They can be matched to the person via genomic testing. I carry the gene and if I had psoriasis, Stelara is the match for me, but oddly, I have no symptoms...the gene isn't turned on. We have vitiligo in my family and apparently it is the same gene as the one identified for psoriasis.

Enbrel has been on the market longer and probably has a more established safety profile.

If he has been off IVIG, I doubt that his current issue is associated with the IVIG infusions of the past.

Psoriasis is a bear of a disease, especially with psoriatic arthritis.