<unk>  is a quinolone antibiotic that has been discontinued in the U.K. as well the United States, both as a branded drug or a generic.<unk>  was an older synthetic antimicrobial related to the quinolone class of antibiotics with activity similar to oxolinic acid and nalidixic acid.  It was commonly used thirty years ago to treat urinary tract infections in adults.  There are reports that<unk>  had also been used to treat initial and recurrent urinary tract infections and bacterial prostatitis in dogs. however this veterinary use was never approved by the United States Food and Drug Administration (FDA).  In complicated UTI, the older gyrase-inhibitors such as<unk>  are no longer indicated.
Cinoxacin
Azithromycin 
Enoxacin
Roxithromycin
Levofloxacin 
Fleroxacin
Telithromycin
Dirithromycin