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Peginterferon alfa-2a [Pegylated Interferon alfa-2a]: Brands, Price & Uses in Bangladesh
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is a pegylated (long-acting) form of interferon alfa-2a used for the following established indications: FDA-approved / established uses Chronic…
About Peginterferon alfa-2a [Pegylated Interferon alfa-2a]
Indications of Peginterferon alfa-2a [Pegylated Interferon alfa-2a]
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is a pegylated (long-acting) form of interferon alfa-2a used for the following established indications:
FDA-approved / established uses
- Chronic Hepatitis C (CHC): In adults and pediatric patients (5 years and older) with compensated liver disease, Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is used in combination with other antiviral drugs (historically ribavirin) as part of a combination regimen.
- Chronic Hepatitis B (CHB): In adults and pediatric patients (3 years and older) with HBeAg-positive or HBeAg-negative chronic hepatitis B with compensated liver disease and evidence of viral replication and liver inflammation, Peginterferon alfa-2a [Pegylated Interferon alfa-2a] may be used as monotherapy.
Important note on current practice
In most settings, interferon-based regimens for hepatitis C have been largely superseded by direct-acting antiviral (DAA) regimens, which are better tolerated and more effective. Peginterferon alfa-2a [Pegylated Interferon alfa-2a] for hepatitis C is now generally reserved for specific situations where DAAs are unavailable, not tolerated, or not indicated. Use for hepatitis B remains an option alongside nucleos(t)ide analogues, chosen based on patient-specific factors.
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] should only be prescribed and monitored by a physician experienced in the management of viral hepatitis.
Dosage & Administration of Peginterferon alfa-2a [Pegylated Interferon alfa-2a]
Chronic Hepatitis C (adults)
| Regimen/Genotype | Dose | Duration |
|---|---|---|
| Combination therapy (with other antivirals), genotype 1/4 | 180 mcg subcutaneously once weekly | Typically 48 weeks |
| Combination therapy, genotype 2/3 | 180 mcg subcutaneously once weekly | Typically 24 weeks |
Chronic Hepatitis C (pediatric, 5 years and older)
180 mcg/1.73 m² body surface area (BSA) subcutaneously once weekly, up to a maximum of 180 mcg, in combination with ribavirin, for a duration determined by genotype (24-48 weeks).
Chronic Hepatitis B (adults)
180 mcg subcutaneously once weekly for 48 weeks as monotherapy.
Chronic Hepatitis B (pediatric, 3 years and older)
180 mcg/1.73 m² BSA subcutaneously once weekly (maximum 180 mcg) for 48 weeks.
Renal impairment
| Creatinine Clearance | Recommended Dose |
|---|---|
| 30-50 mL/min | 180 mcg once weekly (use with caution) |
| Less than 30 mL/min, including hemodialysis | Reduce to 135 mcg once weekly |
Hepatic impairment
Not recommended in patients with decompensated liver disease (see Contraindications). Monitor closely in cirrhotic patients.
Dose modification: Dose reduction or temporary/permanent discontinuation of Peginterferon alfa-2a [Pegylated Interferon alfa-2a] may be required for severe adverse reactions such as significant depression, severe cytopenias, or other serious toxicities, based on physician assessment.
Side Effects of Peginterferon alfa-2a [Pegylated Interferon alfa-2a]
Side effects of Peginterferon alfa-2a [Pegylated Interferon alfa-2a] range from very common, mild flu-like symptoms to rare but serious reactions.
Very common / common
- Flu-like symptoms: fatigue, fever, chills, headache, myalgia, arthralgia
- Injection site reactions (redness, pain, itching)
- Nausea, vomiting, diarrhea, decreased appetite
- Alopecia (hair thinning/loss)
- Insomnia, irritability
- Laboratory abnormalities: mild-to-moderate neutropenia, thrombocytopenia
Serious (see Precautions and Warnings for full detail)
- Neuropsychiatric effects including depression and suicidal ideation
- Autoimmune disorders (thyroiditis, exacerbation of psoriasis, lupus-like syndrome)
- Cardiovascular events (arrhythmia, hypotension, myocardial infarction)
- Severe bone marrow suppression
- Ophthalmologic disorders (retinopathy, retinal hemorrhage)
- Serious infections and colitis/pancreatitis
Patients should seek prompt medical attention for mood changes, unusual bleeding/bruising, vision changes, chest pain, or signs of infection while on Peginterferon alfa-2a [Pegylated Interferon alfa-2a]. See Precautions and Warnings for monitoring recommendations related to the boxed warning.
Contraindications of Peginterferon alfa-2a [Pegylated Interferon alfa-2a]
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is contraindicated in patients with:
- Known hypersensitivity to interferon alfa or any component of the formulation.
- Autoimmune hepatitis.
- Hepatic decompensation (e.g., Child-Pugh score greater than 6) in patients with cirrhosis, including hepatitis C patients with cirrhosis before or during treatment.
- Neonates and infants, due to the benzyl alcohol excipient present in some formulations, which has been associated with fatal "gasping syndrome" in this age group.
When Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is used in combination with ribavirin, the combination is additionally contraindicated in pregnant women and in men whose female partners are pregnant, due to ribavirin's teratogenic and embryocidal effects (see Pregnancy and Lactation).
Frequently Asked Questions about Peginterferon alfa-2a [Pegylated Interferon alfa-2a]
What is Peginterferon alfa-2a [Pegylated Interferon alfa-2a] used for?
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is used to treat chronic hepatitis C (usually in combination with other antivirals) and chronic hepatitis B (usually alone) in adults and eligible children, in patients with compensated liver disease.
How is Peginterferon alfa-2a [Pegylated Interferon alfa-2a] given?
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is given as a subcutaneous (under-the-skin) injection, usually once a week, into the abdomen or thigh. The dose and duration depend on the condition being treated, kidney function, and how well the treatment is tolerated.
Can Peginterferon alfa-2a [Pegylated Interferon alfa-2a] cause depression or mood changes?
Yes. Peginterferon alfa-2a [Pegylated Interferon alfa-2a] carries a boxed warning because it can cause or worsen depression, anxiety, and in rare cases suicidal thoughts. Tell your doctor immediately if you notice mood changes, hopelessness, or thoughts of self-harm during treatment.
Can Peginterferon alfa-2a [Pegylated Interferon alfa-2a] be used during pregnancy?
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] should be used in pregnancy only if clearly needed and the potential benefit outweighs potential risk to the fetus, under close physician supervision. If Peginterferon alfa-2a [Pegylated Interferon alfa-2a] is combined with ribavirin, pregnancy must be strictly avoided because ribavirin can cause serious birth defects; reliable contraception is required during and for 6 months after combination treatment.
Who should not use Peginterferon alfa-2a [Pegylated Interferon alfa-2a]?
Peginterferon alfa-2a [Pegylated Interferon alfa-2a] should not be used by people with known hypersensitivity to interferon alfa, autoimmune hepatitis, decompensated liver disease/cirrhosis, or in neonates and infants. It should also not be combined with ribavirin during pregnancy.
What monitoring is needed while on Peginterferon alfa-2a [Pegylated Interferon alfa-2a]?
Your doctor will typically monitor complete blood counts, thyroid function, liver function, mood/mental health, and eye health (in higher-risk patients) periodically throughout treatment because of the risk of blood, thyroid, psychiatric, and eye-related side effects.
Disclaimer
The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.