Influvac Tetra

influenza virus vaccine, quadrivalent, the active ingredient in Influvac Tetra, is a vaccine presented as an injectable solution for intramuscular, subcutaneous use. It induces active immunity to prevent influenza infection caused by the four virus strains included in the formulation, targeting individuals at risk of seasonal flu.

GNH USA supplies Influvac Tetra as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide. The company adheres to stringent quality standards and provides regulatory‑approved products to meet global immunization needs.

Influvac Tetra is a quadrivalent influenza vaccine used for active immunization against seasonal influenza.

- Seasonal influenza (any age): Provides protection against infection by the four influenza virus strains included in the vaccine. - Elderly population (≥65 years): Reduces risk of severe influenza and related complications. - Individuals with chronic medical conditions: Lowers incidence of influenza‑related morbidity.

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 temperature rise within 24‑48 hours. - Headache: mild headache often resolves spontaneously. - Myalgia: muscle aches that are usually short‑lived. - 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 progressive weakness. - Severe allergic reaction: urticaria, angioedema, or respiratory distress. - Seizures: uncommon neurologic event, especially in febrile children. - High fever: temperature >40 °C persisting beyond 48 hours. - Thrombocytopenia: rare drop in platelet count.

Before administration, consider the following precautions: - Allergy to vaccine components: avoid if known hypersensitivity to any ingredient. - History of severe allergic reaction to previous influenza vaccines: consult a specialist. - Acute febrile illness: defer vaccination until recovery. - Immunocompromised patients: monitor immune response and consider alternative strategies. - Pregnancy and breastfeeding: discuss risk‑benefit with healthcare provider. - Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Vaccination may be influenced by other medical products. Monitor accordingly.

Major Interactions (Avoid): - Concurrent administration of immunoglobulins or blood products: may reduce vaccine efficacy. - Live attenuated vaccines within 4 weeks: potential interference with immune response.

Moderate Interactions (Monitor Closely): - Prophylactic antipyretics (acetaminophen, ibuprofen): may blunt antibody production. - Immunosuppressive therapy: assess serologic response after vaccination. - Allergy medications (antihistamines): generally safe but monitor for atypical reactions.