Viracin 200 mg contains a synthetic nucleoside analogue with broad antiviral activity. Although its exact mechanism of action is not fully understood, it is known to interfere with viral nucleic acid synthesis by acting at multiple intracellular sites, including cellular enzymes. The antiviral activity is attributed to its mono- and triphosphate metabolites, which inhibit viral replication. Besides hepatitis C virus, it has demonstrated inhibitory activity against respiratory syncytial virus, influenza virus, and herpes simplex virus.

রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Indications

Viracin 200 mg is indicated for:

• Treatment of chronic hepatitis C virus infection in combination with interferon alpha or peg-interferon

• Adult patients with compensated liver disease

• Adult patients coinfected with HIV and HCV
  Viracin 200 mg should never be used as monotherapy.

Dosage and Administration

The recommended duration of therapy depends on prior treatment history, viral genotype, and body weight.

• Previously untreated patients: 24 to 48 weeks
  Virologic response should be assessed at 24 weeks. Discontinuation should be considered if HCV RNA remains detectable.

• Relapse after interferon therapy: 24 weeks

Combination with Interferon Alpha

• Genotype 1 & 4:

  • <75 kg: 1000 mg/day

  • 75 kg: 1200 mg/day
    Duration: 48 weeks

• Genotype 2 & 3:
  Duration: 24 weeks

Combination with Peg-Interferon

• Genotype 1 & 4:

  • <75 kg: 1000 mg/day

  • 75 kg: 1200 mg/day
    Duration: 48 weeks

• Genotype 2 & 3:
  800 mg/day for 24 weeks

Viracin 200 mg may be taken with or without food but should be administered consistently. Adequate hydration is advised to reduce the risk of adverse effects.

Drug Interactions

• Concomitant use with azathioprine may cause severe pancytopenia and increased myelotoxicity

• Use with didanosine is contraindicated due to reports of fatal hepatic failure and other serious toxicities

• Dose adjustments or discontinuation may be required if combined with nucleoside reverse transcriptase inhibitors or interferon in case of worsening toxicities

Contraindications

• Pregnancy and women of childbearing potential

• Male patients whose female partners are pregnant

• Patients with hemoglobinopathies such as thalassemia major or sickle-cell anemia

• Concomitant use with didanosine

  রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Side Effects

Common adverse reactions include:

• Psychiatric and central nervous system disorders

• Severe ocular complications

• Dental and periodontal disorders

• Growth inhibition in children and adolescents
  Pediatric adverse reactions are generally similar to those seen in adults.

Pregnancy and Lactation

Viracin 200 mg is classified as Pregnancy Category X due to its high risk of embryocidal and teratogenic effects. Strict contraception measures are required during therapy and for several months after treatment. Breastfeeding should be discontinued or therapy stopped, depending on clinical necessity.

Precautions and Warnings

• High risk of birth defects and fetal death

• Mandatory pregnancy testing and dual contraception

• Dose adjustment required in renal impairment

• Use with caution in elderly patients due to reduced renal function

Storage Conditions

Store in a cool, dry place, protected from light. Keep out of reach of children.