Constant itching day and night since beginning of April. Have ruled out my thyroid med. Quit taking it one week ago as a possible side effect of a recently increased dosage. Strong family history of cancer. I take ibuprofen, Zoloft, & tramadol daily for fibromyalgia. Plus Centrum Silver, calcium and magnesium for osteopena. Have taken all for years. The itching keeps me awake. It intensifies about an hour after taking my meds no matter what time ingested. Help!