Infection after gallbladder surgery.

Hi, my age is 27. I had gallbladder removal surgery on 5th of January this year. After gallbladder surgery I am having only one problem that is infection on the incision sites. I took many anti biotics but my infections are still there. Some fluid is coming out from the belly button since last 1 and half months, now it's little less but not cured completely. Today I visit my doctor again and he said the infection is still there and prescribed a medicine named " R Cinex" and said this is a medicine we often use to treat tuberculosis so you might notice some side effects like changes in urine colour so don't panic. But now I am tensed because why does he prescribed TB medicine to me? Does this medicine work for other conditions too? I have attached my prescription.