Nevermind. I wrote one of the larger labs in the US and no medications are known to affect the CEA readings, tho age (after 60, after 70), weight (larger people tend to have lower CEA readings) and smoking do.
Hi, cipro is unlikely to cause changes in CEA levels. However inflammatory diseases of the gastrointestinal tract can cause an elevation of this tumor marker. Less than 25% of patients with disease confined to the colon have an elevated CEA level. Sensitivity increases with advancing tumour stage.The sensitivity for detecting recurrence is 97% in patients whose CEA was elevated preoperatively, but only 66% in those with normal preoperative levels. Good luck. Regards.