IMOVAX® Rabies

05/22/2024
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Product Information

  • Name: IMOVAX® Rabies
  • Type: Rabies Vaccine Inactivated (DCO)
  • Form: Powder and Diluent for Suspension for Injection
  • Manufacturer: Sanofi Pasteur Limited

Indications and Clinical Use

  • Indications:
    • Pre-exposure Prophylaxis: For individuals at high risk of exposure to rabies virus (e.g., certain laboratory workers, veterinarians, animal handlers, travelers to areas where rabies is endemic).
    • Post-exposure Prophylaxis: For individuals who have been exposed to the rabies virus.

Dosage and Administration

  • Pre-exposure Prophylaxis:
    • Primary Vaccination: Three doses of 1.0 mL intramuscularly on days 0, 7, and 21 or 28.
    • Booster Doses: Administered intramuscularly based on serologic testing or potential exposure.
  • Post-exposure Prophylaxis:
    • Previously Unimmunized Individuals: Five doses of 1.0 mL intramuscularly on days 0, 3, 7, 14, and 28, along with rabies immunoglobulin (RIG) on day 0.
    • Previously Immunized Individuals: Two doses of 1.0 mL intramuscularly on days 0 and 3, without RIG.

Contraindications

  • Pre-exposure: Hypersensitivity to any component of the vaccine or its container.
  • Post-exposure: No absolute contraindications, but caution is advised in individuals with hypersensitivity to the vaccine components.

Warnings and Precautions

  • General: Pre-exposure immunization should be deferred in the presence of acute illness. Post-exposure prophylaxis should be initiated as soon as possible after exposure.
  • Immunocompromised Individuals: May have a reduced immune response; serologic testing is recommended to ensure adequate response.
  • Special Populations:
    • Pregnancy: Administer only if clearly needed.
    • Breastfeeding: Caution is advised.

Adverse Reactions

  • Very Common: Injection site reactions (pain, erythema, swelling), headache, malaise, myalgia.
  • Common: Fever, injection site pruritus.
  • Rare: Anaphylaxis, serum sickness-like reactions, Guillain-Barré syndrome.

Drug Interactions

  • Concurrent Administration: Can be administered with other vaccines, but at different injection sites and using separate syringes.
  • Immunosuppressive Treatments: May interfere with the antibody response.

Storage and Stability

  • Store at 2° to 8°C. Do not freeze. Protect from light. Use immediately after reconstitution.

Clinical Trials and Efficacy

  • Pre-exposure Studies: Demonstrated high seroconversion rates and long-term maintenance of antibodies.
  • Post-exposure Studies: Proven efficacy in preventing rabies when administered promptly after exposure.
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Written By Paul Kim

Medical Director - APN, NSWOC, RNP

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