Can I give a 16-year-old Cipronex for sinusitis with subfebrile status?

Cipronex is a prescription drug, so the legitimacy and need for its use in sinusitis is assessed by the doctor. Do not use this preparation without consulting a doctor. It is difficult to propose a specific method of treatment based on such a short description, but I do not see any grounds for antibiotic administration. I encourage you to make an appointment with a gynecologist who will adjust the treatment according to the current clinical condition of the patient. I also encourage you to read the article: https://www.gdziepolek.pl/artykuly/fakty-i-mity-o-antybiotykach