--Chloramphenicol: Bone marrow depression, aplastic anaemia, gray syndrome, hypersensitivity reactions, peripheral neuritis, optic neuritis. Dexamethasone: Hyperglycemia, osteoporosis, adrenal suppression, muscle weakness, peptic ulcer, electrolyte imbalance, cataract, glaucoma, mental disturbances, growth suppression in children. Polymyxin B Sulphate: Nephrotoxicity, neurotoxicity, respiratory paralysis, skin rashes, drug fever.