http://www.prescriptiondrug-info.com/threads/blood-in-urine-D76433_s2.htm Recent Posts About blood in urine at The People's Medicine Community. I jus started takin macrobic...an I started like my menstraul wen I ahredi had it this month en-us Copyright 2009 Prescription Drug Info All Rights Reserved. 11/21/2009 11:36:59 PM 20 http://www.PrescriptionDrug-Info.com/threads/blood-in-urine-D76433_s2.htm#176675 Did you mean Macrobid,the antibiotic containing <a href="http://www.PrescriptionDrug-Info.com/Drugs/Nitrofurantoin.asp" target="Nitrofurantoin.asp">Nitrofurantoin?</a> <br> <br>Is the blood in your urine or is it menstrual? <br> <br>If you use a form of female contraceptive and take antibiotics, they can affect the efficacy and this may cause breakthrough bleeding. <br> <a href="http://www.prescriptiondrug-info.com/drug_details.asp?title=Macrobid&page=1001420&ad=true" target="K88023F36L"><br>http://www.prescriptiondrug-info.com/drug_details.asp?title=Macrobid&page=1001420&ad=true</a> Sun, 23 Aug 2009 17:20:56 -0800