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Side effects of alpha interferon in chronic hepatitis C
1Royal Free Hospital and School of Medicine, London, United Kingdom.
Hepatology (Baltimore, Md.)
|September 26, 1997
Summary
Alpha interferons are effective for hepatitis C but cause numerous side effects, ranging from mild flu-like symptoms to severe autoimmune conditions and organ damage, necessitating careful patient monitoring.
Area of Science:
- Hepatology
- Immunology
- Pharmacology
Background:
- Alpha interferons (IFNs) are widely used for chronic hepatitis C virus (HCV) infection.
- Treatment involves subcutaneous or intramuscular injections for 6-24 months.
- Various formulations exist, including recombinant, natural leukocyte, and lymphoblastoid interferons.
Framework:
- Alpha interferon administration involves daily or thrice-weekly injections.
- Treatment duration is extensive, ranging from 6 to 24 months.
- Dosage and administration routes are critical factors in treatment efficacy and tolerability.
Implementation:
- Common side effects include fever, headache, fatigue, arthralgias, and myalgias, particularly with initial injections.
- Neuropsychiatric effects like depression and irritability can occur.
- Hematological changes (decreased granulocytes, platelets, red blood cells) are usually mild but can be dose-limiting.
Implications:
- Interferon therapy can induce or aggravate autoimmune phenomena, notably autoimmune thyroiditis.
- Severe, potentially irreversible side effects (thyroid, visual, auditory, renal, cardiac, pulmonary) affect 0.1-1% of patients.
- Higher interferon doses correlate with increased adverse event rates, and contraindications exist.