Onoff 200mg Tablet contains Ofloxacin, a fluoroquinolone antibiotic effective against a broad spectrum of bacterial infections. Ofloxacin exerts its bactericidal action by inhibiting bacterial DNA gyrase and topoisomerase IV, enzymes essential for DNA replication, transcription, repair, and recombination, thereby preventing bacterial cell division and growth. Onoff 200mg is indicated for the treatment of various infections caused by susceptible strains of bacteria, including respiratory tract infections, urinary tract infections, skin and soft tissue infections, and sexually transmitted infections such as chancroid and gonorrhea. It is also used in the management of bacterial prostatitis and certain gastrointestinal infections. The tablet is administered orally, with dosage and duration tailored according to the severity and type of infection, patient age, renal function, and clinical response. Common side effects may include gastrointestinal disturbances such as nausea, vomiting, and diarrhea, as well as central nervous system effects like dizziness and headache. Caution is advised in patients with a history of tendon disorders related to fluoroquinolone use, and it is contraindicated in individuals with known hypersensitivity to ofloxacin or other quinolones. Use during pregnancy and lactation should be avoided unless clearly necessary. Proper adherence to prescribed dosage ensures optimal therapeutic outcomes and minimizes the risk of resistance development.