Lizoforce-600 Tablet contains Linezolid, a potent antibiotic that may help with tonsillitis if the bacteria respond to it, but it is usually used for more severe infections. Do not start or stop antibiotics, such as Althrocin-500 Tablet (Erythromycin), without consulting your doctor. You need a proper medical check to confirm the cause of your tonsillitis and to see whether your current antibiotic is suitable for treating it.