Influenza Virus Release Inhibitors

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Questions and Answers

What is the primary mechanism of action of Oseltamivir?

  • Inhibits viral protein synthesis
  • Inhibits influenza virus neuraminidase (correct)
  • Stimulates immune response
  • Inhibits viral RNA replication

What is a common side effect of taking Oseltamivir?

  • Dizziness
  • Fatigue
  • Headache
  • Nausea (correct)

Which of the following is a contraindication for Oseltamivir?

  • Adults over 65
  • None specified (correct)
  • Pregnancy
  • Renal impairment

When should Oseltamivir be started for it to be effective?

<p>Within 48 hours of symptom onset (D)</p> Signup and view all the answers

What is a serious adverse effect associated with Oseltamivir?

<p>Rash (SJS/TENS) (A)</p> Signup and view all the answers

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Study Notes

Influenza Virus Release Inhibitors

  • Mechanism of Action: Inhibit influenza neuraminidase, preventing newly made virus particles from detaching from host cells.
  • Oseltamivir (TamifluĀ®):
    • Given orally (PO) as an inactive prodrug (oseltamivir phosphate).
    • Activated in the liver by ester hydrolysis.
    • Renal Adjustment: Dose adjustments are required for patients with kidney dysfunction.
    • CDC Recommendation: Recommended by the CDC for treatment and prophylaxis.
    • Black Box Warning (BBW): None.
    • Contraindications: None.
    • Clinical use: Effective against influenza A and B, for both treatment and prevention.
    • Timing: Start taking within 48 hours of symptom onset.
    • Administration: Take with food
    • Common Side Effects: Nausea, vomiting, abdominal pain.
    • Serious Side Effects: Rash (Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis), Neuropsychiatric events.
    • Drug Interactions: Live influenza vaccine.

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