Epigastric pain, nausea, vomiting, diarrhea, oral mucositis, taste disorders, anorexia, reversible pancreatitis, tongue discoloration/furry tongue; angioedema, anaphylactic shock; peripheral sensory neuropathy, headache, convulsions, dizziness, encephalopathy (eg, confusion, fever, headache, hallucinations, paralysis, light sensitivity, disturbances in sight & movement, stiff neck) & subacute cerebellar syndrome (eg, ataxia, dysarthria, gait impairment, nystagmus & tremor), aseptic meningitis; psychotic disorders including confusion, hallucinations, depressed mood; transient vision disorders ie, diplopia, myopia, blurred vision, decreased visual acuity, changes in color vision, optic neuropathy/neuritis; agranulocytosis, neutropenia & thrombocytopenia; increase in liver enzymes (AST, ALT, alkaline phosphatase), cholestatic or mixed hepatitis & hepatocellular liver injury, liver failure; rash, pruritus, flushing, urticaria, pustular eruptions, erythema multiforme; fever.