It won't affect things at all! Macrobid's half life is 15min to 1 hour, which means 12 hours after you last dose it will be completely out of you system. Most likely earlier than that since your kidney function is normal.
Remember though to take it exactly the same time everyday. Don't take it any earlier or later because of its short half life it needs to be at the therapeutic level to get rid of your infection. That is why so many women end up needing another antibiotic to get rid of their UTI. It's not that they had a bad infection, it's just they were not properly educated on how important it is to take it exactly the same time everyday.
TAKE IT AT THE SAME TIME EVERYDAY [emoji4]!
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