What other medication I can take instead of hydroxychloroquine as it gave me pigmentation on the roof of my mouth. I'm negative Ana. I take mepacrine but really struggle with the other.

The only antimalarials available for lupus patients are hydroxychloroquine and mepacrine, both of which can result in dark pigmentation in the roof of the mouth, on the shins and the finger nails after some years of use. This can sometimes be minimised by using the smallest dose that is effective.