Flagyl IV Adverse Reactions

Gastrointestinal disorders: epigastric pain, nausea, vomiting, diarrhea.
Oral mucositis, taste disorders, anorexia.
Reversible cases of pancreatitis.
Tongue discoloration/furry tongue (e.g. due to fungal fungal overgrowth).
Immune system disorders: angioedema, anaphylactic shock.
Nervous system disorders: peripheral sensory neuropathy.
Headache, convulsions, dizziness.
Reports of encephalopathy (e.g. confusion, fever, headache, hallucinations, paralysis, light sensitivity, disturbances in sight and movement, stiff neck) and subacute cerebellar syndrome (e.g. ataxia, dysarthria, gait impairment, nystagmus, and tremor), which may resolve with discontinuation of the drug.
Aseptic meningitis.
Psychiatric disorders: psychotic disorders including confusion, hallucinations.
Depressed mood.
Eye disorders: transient vision disorders such as diplopia, myopia, blurred vision, decreased visual acuity, changes in color vision.
Optic neuropathy/neuritis.
Blood and lymphatic system disorders: cases of agranulocytosis, neutropenia and thrombocytopenia have been reported.
Pancytopenia (very rare).
Leucopenia (not known).
Hepatobiliary disorders: increase in liver enzymes (AST, ALT, alkaline phosphatase), cholestatic or mixed hepatitis and hepatocellular liver injury, sometimes with jaundice, have been reported.
Cases of liver failure requiring liver transplant have been reported in patients treated with metronidazole in combination with other antibiotic drugs.
Skin and subcutaneous tissue disorders: rash, pruritus, flushing, urticaria.
Pustular eruptions.
Erythema multiforme.
General disorders and administration site conditions: fever.
Musculoskeletal, connective tissue and bone disorders: Very rare: myalgia, arthralgia.
Renal and urinary disorders: Very rare: darkening of urine (due to metronidazole metabolite).