A member asked:

I was on macrobid for 12 hours before leaving a sample for a urine culture. it came back negative. would the macrobid have caused a false negative?

A doctor has provided 1 answer

Dr. George Klauber answered

Specializes in Pediatric Urology

False negative: 12 hours is plenty of time for Macrodantin to reach the bladder and destroy most or all bacteria there. However you need more than a single dose to treat a UTI. Thus suggest you the Macrobid twice daily for 3 days.. Good luck.

Answered 11/17/2020

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A member asked:

I was on macrobid for 12 hours before leaving a sample for a urine culture. it came back negative. would the macrobid have caused a false negative?

A doctor has provided 1 answer

Dr. George Klauber answered

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