Influvac Tetra

Influenza virus vaccine, quadrivalent, the active ingredient in Influvac Tetra, is a vaccine presented as an injectable solution for intramuscular or subcutaneous use. It induces immunity to prevent influenza caused by A(H1N1), A(H3N2), B/Victoria and B/Yamagata strains in adults and children.

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

Influvac Tetra is a quadrivalent influenza vaccine indicated for the prevention of seasonal influenza. - Influenza A(H1N1): provides protective antibodies against the H1N1 strain - Influenza A(H3N2): provides protective antibodies against the H3N2 strain - Influenza B (Victoria lineage): provides protective antibodies against the B/Victoria strain - Influenza B (Yamagata lineage): provides protective antibodies against the B/Yamagata strain

Common reactions to Influvac Tetra are generally mild and resolve without intervention.

Common Side Effects: - Injection site pain or tenderness - Redness or swelling at the injection site - Low‑grade fever - Headache - Muscle aches - Fatigue

Serious or Rare Side Effects: - Anaphylactic reaction - Guillain‑Barré syndrome - Severe allergic response (e.g., angioedema) - High fever or seizures - Myocarditis or pericarditis - Persistent neurological symptoms

Influvac Tetra should be administered only after evaluating the following considerations: - Allergy assessment: avoid if there is a known severe allergy to any vaccine component - Prior reaction: defer if the patient experienced a severe reaction to a previous influenza vaccine - Age eligibility: follow the approved age range for the specific formulation - Pregnancy and lactation: discuss potential benefits and risks with a healthcare professional - Immunocompromised status: vaccine may be less effective in severely immunocompromised individuals - Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake

Vaccines can interact with other medical products, and careful timing is advised.

Major Interactions (Avoid): - Live attenuated vaccines: avoid simultaneous administration with Influvac Tetra - Immunoglobulin or blood products: may diminish vaccine‑induced immunity if given concurrently

Moderate Interactions (Monitor Closely): - Antipyretic or analgesic use before vaccination: may blunt antibody response if taken prophylactically - Immunosuppressive therapy: may reduce the immunogenicity of the vaccine - Acute febrile illness: postpone vaccination until the patient has recovered