GRINOCEF-O is an antibiotic medicine used to treat bacterial infections such as throat infection, chest infection, sinusitis, ear infection, urinary tract infection (UTI), and skin infections. It contains Cefixime, which helps stop bacterial growth and clears the infection effectively. Common side effects may include nausea, stomach pain, diarrhea, vomiting, and indigestion. It should be taken only as prescribed by the doctor, and the full course must be completed for better results.