The only issue of concern that I am aware of is an increased risk of myocarditis associated with some of the drugs, particularly with Clozaril. Whether that extends to all of the drugs in the group, and whether the risk of that inflammatory condition is more of a problem for SLE patients, I have no idea, but it would seem likely. The important thing is to make sure that your two doctors (I am assuming here that the rheumatologist is not writing your Rx's for the bipolar medicine) are coordinating your treatment so that you don't unnecessarily stop your medicine, but that they are each aware of the possibilities of side effects.