Has anyone developed a circular rash?

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I am one year post transplant. Two months ago I developed a round circular/ different sizes pale pink rash on just my legs and arms . Has anybody else experienced this while on tacrolimus, mycophenolic acid , prednisone ,carvedilol,nifedipine,rosavastatin , vitamins, hiprex and valtrex. I have been to a dermatologist and after 3 biopsies they said it was a drug reaction and not cancer. I have also seen a oncologist and my team knows.No one can help and tell what drug it might be . I have already stopped valtrex and hiprex. I have been hoping to figure out which drug it might be by process of elimination. Any thoughts from you guys would be helpful!

Thanks

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Does it itch?