Influvac Tetra

B/Phuket/3073/2013, B/Austria/1359417/202, the active ingredient in Influvac Tetra, is a vaccine presented as a sterile suspension for intramuscular or subcutaneous use. It is designed to stimulate immunity against the specified influenza B virus strains and is indicated for prevention of influenza B infection in eligible populations.

GNH USA supplies Influvac Tetra as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Influvac Tetra is an influenza B vaccine used to prevent infection caused by the included viral strains. - Influenza B (B/Phuket/3073/2013): reduces the risk of seasonal influenza caused by this lineage. - Influenza B (B/Austria/1359417/202): reduces the risk of seasonal influenza caused by this lineage. - Seasonal influenza B overall: contributes to community protection against circulating B viruses.

Common Side Effects: - Injection site pain: mild to moderate discomfort at the injection site. - Redness or swelling: localized erythema or edema. - Low‑grade fever: transient increase in body temperature. - Headache: mild headache occurring within 24 hours. - Myalgia: muscle aches or soreness. - Fatigue: temporary feeling of tiredness.

Serious or Rare Side Effects: - Anaphylaxis: severe allergic reaction requiring immediate medical attention. - Guillain‑Barré syndrome: rare neurological disorder with muscle weakness. - Severe allergic reaction: urticaria, angioedema, or respiratory distress. - Seizures: uncommon neurologic event. - High‑grade fever: persistent fever above 39 °C. - Thrombocytopenia: low platelet count observed in rare cases.

Before vaccination, consider the following precautions: - Allergy assessment: avoid if the patient has a known severe allergy to any vaccine component. - Egg allergy: evaluate risk, as the vaccine may contain trace egg protein. - Post‑vaccination observation: monitor the patient for at least 15 minutes for immediate reactions. - Immunocompromised patients: weigh benefits against potential reduced efficacy. - Pregnancy and breastfeeding: discuss with a healthcare professional before administration. - Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake the vial.

Influvac Tetra may interact with other medical products as follows: Major Interactions (Avoid): - Live attenuated vaccines: avoid simultaneous administration to prevent interference. - Immunoglobulin therapy: may diminish vaccine‑induced immunity. - Antiviral agents (e.g., oseltamivir) given within 48 hours: could reduce vaccine effectiveness. Moderate Interactions (Monitor Closely): - Immunosuppressive drugs: monitor antibody response after vaccination. - Systemic corticosteroids: may lower immunogenicity, consider timing of dose.