Take it until they are gone.
From
Antiobiotic info article:
"Myth 3—It is okay to stop taking an antibiotic after your symptoms go away.
Absolutely not. You need to finish the entire prescription, even if you feel well or no longer experience symptoms. It is important to take an antibiotic exactly as the doctor prescribes. Not finishing the full dosage as prescribed leaves some bacteria alive and “resistant” to future antibiotic treatment.
By not completing the prescription or skipping doses, it is probable that the strongest of the bacteria still remain. These bacteria will continue to replicate and you will have to address the infection for a second time, this time facing a stronger opponent."