Ribavirin: Hepatitis C Antiviral Treatment
Ribavirin is a synthetic nucleoside analogue with broad-spectrum antiviral activity. It enters virus-infected cells and interferes with viral RNA synthesis, effectively inhibiting the replication of the pathogen.
In modern medicine, Ribavirin is primarily used as part of combination therapy for Chronic Hepatitis C (alongside interferons or direct-acting antivirals). Formulations also exist for treating severe respiratory infections in infants. On Unifarm, you can find a list of medications (e.g., Rebetol, Copegus) containing this active ingredient.
Indications
- Chronic Hepatitis C: In adults and children (from age 3). Used only in combination with other agents (interferon alfa-2b, peginterferon, or sofosbuvir). Monotherapy is ineffective for Hepatitis C.
- Respiratory Syncytial Virus (RSV): Severe infections in infants and young children (typically administered via inhalation).
- Viral Hemorrhagic Fevers: Such as Lassa fever (specific indications vary by region).
Dosage and administration
For Hepatitis C, the medication is taken orally (capsules or tablets). The daily dose is determined by the physician based on the patient's body weight and viral genotype.
General Guidelines:
- Taken twice daily (morning and evening).
- Important: Must be taken with food. Food significantly increases bioavailability.
- Typical daily doses range from 800 mg to 1400 mg.
- Treatment duration is typically 24 to 48 weeks.
- Pregnancy (Strictly Prohibited): Ribavirin is teratogenic and causes severe birth defects. A negative pregnancy test is required before starting therapy.
- Breastfeeding.
- Severe cardiac disease (including unstable angina, heart failure).
- Hemoglobinopathies (e.g., thalassemia).
- Severe hepatic impairment (decompensated cirrhosis).
Ribavirin is known for certain toxicities, especially during long-term use:
- Hematologic: Hemolytic anemia (destruction of red blood cells) — the primary dose-limiting side effect requiring hemoglobin monitoring.
- Nervous System: Depression, irritability, insomnia, fatigue.
- Skin: Rash, pruritus (itching), dry skin.
- Respiratory: Dyspnea (shortness of breath), cough.
- Gastrointestinal: Nausea, anorexia.
