Precifix AZ LB 200mg/250mg Tablet is an antibiotic medicine used to treat bacterial infections of the ear, skin, nose, throat, chest, lungs, and urinary tract. This medicine contains cefixime, azithromycin, and lactic acid bacillus (probiotic) which works by inhibiting the protein synthesis of the bacterial cell and thereby helps fight infection-causing bacteria. This medicine is not effective for treating viral infections. Common side effects include nausea, vomiting, indigestion, abdominal pain, and headache.