i had an operation where they put in a foley catheter that stayed in for two days..When they removed the cathe I couldn't pee so they gave me an antibiotic and flomax. I was released from the hospital and took the antibiotic for ten days and it cleared up my problem. I stopped the antibiotic but am still using the flomax. I urinated ok for about one more week after that. I am still urinating ok but now I pass blood and then clear urine. I had no problem urinating before the operation and foley catheter. Passing the blood and then clear urine has been going on for the last 4 days. I am still taking the flomax and am back on the anitbiotic (doxicycline). Is the blood being passed caused by the flomax?