Albendazole Side Effects
For the Consumer
Applies to albendazole: oral tablet
Side effects requiring immediate medical attention
Along with its needed effects, albendazole may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking albendazole:
- Black, tarry stools
- bleeding gums
- blood in the urine or stools
- chest pain
- painful or difficult urination
- pinpoint red spots on the skin
- sore throat
- sores, ulcers, or white spots on the lips or in the mouth
- swollen glands
- unusual bleeding or bruising
- unusual tiredness or weakness
Incidence not known
- Blistering, peeling, or loosening of the skin
- blurred vision
- dark urine
- general feeling of tiredness or weakness
- joint or muscle pain
- light-colored stools
- red, irritated eyes
- stomach pain, continuing
- tightness in the chest
- yellow eyes or skin
Side effects not requiring immediate medical attention
Some side effects of albendazole may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
- Stomach pain
- thinning or loss of the hair
Incidence not known
- Lack or loss of strength
For Healthcare Professionals
Applies to albendazole: compounding powder, oral tablet, oral tablet chewable
Side effects differed between hydatid disease and neurocysticercosis. Symptoms were generally mild and resolved without treatment. Therapy was discontinued primarily due to leukopenia (0.7%) or hepatic abnormalities (3.8% in hydatid disease).[Ref]
Very common (10% or more): Elevated liver enzymes (up to 16%)
Uncommon (0.1% to 1%): Hepatitis
Frequency not reported: Hepatotoxicity, hepatic abnormalities, jaundice, hepatocellular damage
Postmarketing reports: Acute liver failure[Ref]
Mild to moderate elevated liver enzymes were very common.
Severe hepatic abnormalities, including jaundice and hepatocellular damage (possibly irreversible), have been reported during prolonged higher dose treatment of hydatid disease.
Elevated liver enzymes and hepatitis have also been reported during postmarketing experience.[Ref]
Very common (10% or more): Headache (up to 11%)
Common (1% to 10%): Raised intracranial pressure, dizziness, neurological events
Uncommon (0.1% to 1%): Vertigo, meningeal signs
Postmarketing reports: Somnolence, convulsion[Ref]
Headache has also been reported during postmarketing experience.[Ref]
Upper GI symptoms (e.g., epigastric/abdominal pain, nausea, vomiting) and GI disturbances (abdominal pain, nausea, vomiting) were reported.
Diarrhea has also been reported during postmarketing experience.[Ref]
Common (1% to 10%): Epigastric/abdominal pain, nausea, vomiting, upper gastrointestinal (GI) symptoms, GI disturbances
Uncommon (0.1% to 1%): Diarrhea
Uncommon (0.1% to 1%): Itchiness, skin rashes
Reversible alopecia (thinning of hair and moderate hair loss) has also been reported during postmarketing experience.[Ref]
Fever has also been reported during postmarketing experience.[Ref]
Common (1% to 10%): Fever, hyperpyrexia
Postmarketing reports: Asthenia[Ref]
Common (1% to 10%): Leukopenia
Agranulocytosis and pancytopenia have also been reported during postmarketing experience.
Rare (less than 0.1%): Ocular maculopathy
Frequency not reported: Retinal damage
Postmarketing reports: Blurred vision[Ref]
Rare (less than 0.1%): Bone pain
Postmarketing reports: Rhabdomyolysis[Ref]
Rare (less than 0.1%): Proteinuria
Postmarketing reports: Acute renal failure[Ref]
1. "Product Information. Albenza (albendazole)." SmithKline Beecham, Philadelphia, PA.
2. Cerner Multum, Inc. "Australian Product Information." O 0
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.
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