Levofloxacin (the active ingredient in Levoxa) is usually used for 5-10 days. It usually starts to work quickly, but the time it takes for you to notice an improvement in symptoms depends on several factors, including the severity of the infection (in the case of mild infections, improvement may be visible even within 2-3 days), the patient's general health, or the cause of the infection (if the bacteria responsible for the infection are sensitive to levofloxacin, the effect of the drug will be faster). If you do not notice any visible improvement after 5 days of using Levoxa, you should contact your doctor, as this may indicate bacterial resistance or another cause of your symptoms.

Please note that even if you do improve quickly, you should continue the therapy as directed by your doctor (usually 5-10 days) to avoid a recurrence of the infection or the development of bacterial resistance: https://www.gdziepolek.pl/blog/antybiotyki-czy-przestana-dzialac

I have attached helpful materials:

https://www.gdziepolek.pl/produkty/43348/levoxa-tabletki-powlekane/ulotka

https://www.gdziepolek.pl/artykuly/fakty-i-mity-o-antybiotykach