What Causes Skin Rashes After Taking Carisoprodol?

hi, i have a back pain for about 6 months and couple days ago a friend gave me toke carisoprodol 350 mg, after i take it, i noticed some wonder on my skin. One friend told me that it may be kidney disease, my question is: does this medication is the cause of the wonder on my skin? or it is a symptom of kidney disease?