Would you target the same hydroxychloroquine blood level for discoid lupus compared to systemic lupus?

Yes, I would.

A French multicenter study (under the direction of Nathalie Costedoat-Chalumeau, MD, one of my favorite HCQ experts) assessed whole blood HCQ drug levels in 300 patients with cutaneous lupus erythematosus (CLE). There were 254 cases of chronic cutaneous lupus, 160 of which were discoid...