Finafloxacin (Xtoro) is an antibiotic in the Quinolone family. It was recently approved for use in the United States for the treatment of bacterial ear infections.
Finafloxacin is not currently used for the treatment of acne, but the acne-causing P. acnes bacterium is likely to be sensitive to this antibiotic. For treating acne, other members of the Quinolone family (eg. Nadifloxacin, Ciproflocaxin) are more commonly used.