Therefore, it is not uncommon to be on antibiotics prior to the surgery.
Antibiotics are
for infections only, so colds do not need
to be treated with an antibiotic. Ideally you don't want her to have to be on any medications, however you can't leave an infection untreated. So, continue her antibiotic as prescribed, be sure that it is given to her appropriately (at the right time and for the right amount of days). Good luck.