O2 Tablet is used to treat bacterial infections of the urinary tract, bacterial infections by inflammation of the peritoneum, eye and ear infections, skin and soft tissue infections, sexually transmitted infections, respiratory infections, vaginal infections, protozoan infections, intra-abdominal infections, and infections during surgical procedures. It is also indicated in the treatment of diarrhoea of mixed infections in adults. It contains Ofloxacin and Ornidazole, which stops the growth ... Learn about O2 uses, dosage, side effects, food interactions, and more. Get all the details about O2 from MedicinesFAQ. O2 TABLET is a combination of Ofloxacin and Ornidazole, prescribed to treat diarrhoea caused by micro-organisms. It may cause side effects like nausea, dizziness, and muscle damage. Consult your doctor before using it if you are pregnant, breastfeeding, or have tendon problems. Introduction To O2 Tablet O2 Tablet is used to treat bacterial and protozoan infections of the lungs, skin, reproductive system and gastrointestinal tract. This drug is a combination of two antibiotics: Ofloxacin and ornidazole. The first kills bacteria, while the latter kills parasitic organisms called protozoa. This medication can be prescribed for pneumonia, urethritis, dysentery, amebiasis, giardiasis and other microbial infections.