CellCept is a daily pill, and it’s used for some autoimmune disorders. It’s on the potent end of the immune suppression spectrum so there could be reluctance to prescribe something so strong unless the Sjögrens is also accompanied by significant joint pain, disability or otter systemic problems not responding to milder meds. I hope you get some other good advice on the dry mouth issues. It’s awful having little to no saliva!