“…They have demonstrated antibacterial activity against Gram-positive bacteria ( S. aureus , E. faecalis ) and a number of Gram-negative bacteria ( P. aeruginosa , E. coli , A. baumannii , K. pneumoniae , E. cloacae , U. urealyticum ), as well as M. tuberculosis . Molecules with antimicrobial activity include esomeprazole, lansoprazole, omperazole, and pantoprazole ( Foletto et al, 2021a ; da Rosa et al, 2022 ). It has been proven that PPIs inhibit the activity of fluoroquinolone efflux pumps in S. aureus strains, which increases the activity of, among others, levofloxacin, ciprofloxacin and norfloxacin in staphylococcal infections ( Thangamani et al, 2015 ).…”