Norfloxacin 400mg is an antibiotic belonging to the fluoroquinolone class.

Urinary Tract Infections (UTIs): Norfloxacin is commonly prescribed for the treatment of UTIs, including cystitis and pyelonephritis. It works by inhibiting the bacterial enzymes DNA gyrase and topoisomerase IV, which are necessary for DNA replication, transcription, repair, and recombination​.

Prostatitis: Norfloxacin is used to treat bacterial prostatitis, an infection of the prostate gland. This condition can cause symptoms such as pelvic pain, urinary difficulties, and fever​​.

Gastrointestinal Infections: It is also effective against certain types of bacterial gastroenteritis, including traveler's diarrhea caused by Escherichia coli​.

Sexually Transmitted Infections (STIs): Norfloxacin can be used to treat uncomplicated gonorrhea, although its use for this purpose has decreased due to rising resistance rates among Neisseria gonorrhoeae strains​.

For more detailed information on Norfloxacin, including dosage and specific treatment guidelines, consulting a healthcare professional or the medication's prescribing information is recommended.