I am a 50-year-old female. My blood pressure is low to normal. I was diagnosed eight years ago with Fibromyalgia. I currently take 90 mg of Cymbalta every day. Three or four times a week I take 2-3 mg of Tylenol (although it doesn't help much). I recently was told that my kidney function was 51. My doctor wants to recheck it in three weeks. I am wondering if the medication I am taking could be the cause of my decreased kidney function or whether I may have Lupus instead of Fibromyalgia. I would appreciate any insights you can offer. Thank you.