Ciproxin tablets, suspension and infusion all contain the active ingredient ciprofloxacin, which is a type of medicine called a quinolone antibiotic. Antibiotics are used to treat infections caused by bacteria Ciprofloxacin is effective against a large number of bacteria, some of which tend to be resistant to other commonly used antibiotics. It is particularly useful against a sub-group of bacteria called Gram-negative bacteria, including salmonella, shigella, campylobacter, neisseria, and pseudomonas. It is used to treat a wide range of infections, including infections of the chest, urinary tract and of the gastrointestinal system. It is als