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Nitisinone Side Effects

For the Consumer

Applies to nitisinone: oral capsule, oral suspension

As well as its needed effects, nitisinone may cause unwanted side effects that require medical attention.

Major Side Effects

If any of the following side effects occur while taking nitisinone, check with your doctor immediately:

Less common:
  • Black, tarry stools
  • bleeding gums
  • blindness
  • blood in the urine or stools
  • bloody nose
  • blurred vision
  • burning, dry, or itching eyes
  • change in color vision
  • chest pain or discomfort
  • chills
  • cough
  • decreased vision
  • difficulty seeing at night
  • excessive eye tearing
  • eye redness, irritation, or pain
  • fever
  • increased sensitivity of the eyes to sunlight
  • painful or difficult urination
  • pinpoint red spots on the skin
  • redness, pain, swelling of the eye, eyelid, or inner lining of the eyelid
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • swollen or painful glands
  • unusual bleeding or bruising
  • unusual tiredness or weakness
Rare
  • Agitation
  • back pain
  • bluish color of the fingernails, lips, skin, palms, or nail beds
  • confusion
  • cough with mucus
  • difficulty breathing
  • dizziness
  • drowsiness
  • hallucinations
  • headache
  • irritability
  • seizures
  • stiff neck
  • tightness in the chest
  • vomiting

Minor Side Effects

Some nitisinone side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

Less common:
  • Dry skin
  • hair loss or thinning
  • itching or skin rash
  • red, swollen skin
  • scaly skin
Rare
  • Abdominal pain
  • cold sweats
  • cool, pale skin
  • depression
  • fast heartbeat
  • headache
  • increased hunger
  • nausea
  • nightmares
  • seizures
  • shakiness
  • slurred speech

For Healthcare Professionals

Applies to nitisinone: oral capsule, oral suspension

General

The most common reported side effects included hepatic neoplasm, liver failure, thrombocytopenia, leucopenia, visual system complaints (conjunctivitis, corneal opacity, keratitis, photophobia).[Ref]

Dermatologic

Uncommon (0.1% to 1%): Pruritis (1%), exfoliative dermatitis (1%), dry skin (1%), maculopapular rash (1%), alopecia (1%)[Ref]

Endocrine

Frequency not reported: Hypoglycemia[Ref]

Gastrointestinal

Frequency not reported: Abdominal pain, diarrhea, enanthema, gastritis, gastroenteritis, gastrointestinal hemorrhage, melena, tooth discoloration[Ref]

Genitourinary

Frequency not reported: Amenorrhea[Ref]

Hematologic

Common (1% to 10%): Thrombocytopenia (3%), leucopenia (3%), granulocytopenia (1%), porphyria (1%), epistaxis (1%)[Ref]

Hepatic

Common (1% to 10%): Liver failure (7%)
Frequency not reported: Hepatic function disorder, elevated hepatic enzymes, liver enlargement[Ref]

Metabolic

Frequency not reported: High plasma tyrosine levels, dehydration[Ref]

Musculoskeletal

Frequency not reported: Pathological fracture[Ref]

Nervous system

Frequency not reported: Seizures, brain tumor, encephalopathy, headache, hyperkinesia, nervousness, somnolence[Ref]

Ocular

Common (1% to 10%): Conjunctivitis (2%), corneal opacity (2%), keratitis (2%), photophobia (2%), blepharitis (1%), eye pain (1%), cataracts (1%)[Ref]

Oncologic

Common (1% to 10%): Hepatic neoplasm (8%)[Ref]

Other

Frequency not reported: Death, cyanosis, thirst, infection, septicemia, otitis[Ref]

Respiratory

Frequency not reported: Bronchitis, respiratory insufficiency[Ref]

References

1. "Product Information. Orfadin (nitisinone)." Orphan Pharmaceuticals USA, Inc, Nashville, TN.

It is possible that some side effects of nitisinone may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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