Prescribing-label excerpts
Ciprofloxacin Hydrochloride
Reference for: Ciprofloxacin Hcl. Source presentation: solution. Source route: ophthalmic.
The source label presents its clinical-pharmacology findings together. These selected passages retain the source’s study context; the full label provides the complete discussion.
Clinical pharmacology
Systemic Absorption:A systemic absorption study was performed in which Ciprofloxacin ophthalmic solution 0.3% was administered in each eye every two hours while awake for two days followed by every four hours while awake for an additional 5 days. The maximum reported plasma concentration of ciprofloxacin was less than 5 ng/mL. The mean concentration was usually less than 2.5 ng/mL.
Microbiology: Ciprofloxacin has in vitroactivity against a wide range of gram-negative and gram-positive organisms. The bactericidal action of ciprofloxacin results from interference with the enzyme DNA gyrase which is needed for the synthesis of bacterial DNA.
Ciprofloxacin has been shown to be active against most strains of the following organisms both in vitroand in clinical infections ( see INDICATIONS AND USAGE).
Serratia marcescens — Ciprofloxacin has been shown to be active in vitroagainst most strains of the following organisms, however, the clinical significance of these data is unknown:
Other Organisms: — Chlamydia trachomatis(only moderately susceptible) and Mycobacterium tuberculosis(only moderately susceptible).
Most strains of Pseudomonas cepaciaand some strains of Pseudomonas maltophiliaare resistant to ciprofloxacin as are most anaerobic bacteria, including Bacteroides fragilisand Clostridium difficile.
The minimal bactericidal concentration (MBC) generally does not exceed the minimal inhibitory concentration (MIC) by more than a factor of 2. Resistance to ciprofloxacin in vitrousually develops slowly (multiple-step mutation).
Ciprofloxacin does not cross-react with other antimicrobial agents such as beta-lactams or aminoglycosides; therefore, organisms resistant to these drugs may be susceptible to ciprofloxacin.
Selected passages from the cited U.S. prescribing label. The studies concern the source product and populations named in each passage; they do not establish Walter-product bioequivalence, an approved indication, or the kinetics of another fixed combination. Tables and the full prescribing information remain available in the source.
Source: DailyMed: Ciprofloxacin Hydrochloride — solution
Reference accessed . Label revision: 2026-07-12.
