I am really sorry that your kidney disease is no better
Plaquenil has a general disease modifying effect but it is the first drug people are put on. For many it is all they need or, if they need other drugs, it remains as a basis for treatment and also as maintenance often even when in remission.
I am sorry to say that I have never heard that it has any special role to play in controlling kidney disease or any other severe organ involvement. The other drugs in common use are Imuran (azathioprine), methotrexate,
Cellcept (MMF), less commonly Rituxan, along with Prednisone, in various combinations and treatment plans.
Helen I will be keeping you in my hopeful thoughts.