Influvac Tetra

Influenza vaccine (quadrivalent), the active ingredient in Influvac Tetra, is a vaccine presented as an injectable solution for intramuscular or subcutaneous use. It is designed to prevent seasonal influenza caused by specific influenza B virus strains in individuals aged six months and older.

GNH USA supplies Influvac Tetra as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide. The company ensures quality compliance with EU standards for global distribution.

Influvac Tetra is a quadrivalent influenza vaccine that targets the influenza virus family to prevent infection. - Influenza B/Phuket/3073/2013-like virus: provides protection against seasonal influenza caused by this B strain. - Influenza B/Austria/1359417/202-like virus: provides protection against seasonal influenza caused by this B strain. - Seasonal influenza (any covered strain): reduces the risk of illness, hospitalization, and complications associated with influenza infection.

Influvac Tetra may cause local and systemic reactions typical of injectable vaccines.

Common Side Effects: - Pain at injection site: mild to moderate discomfort. - Redness or swelling at injection site. - Low‑grade fever. - Headache. - Muscle aches. - Fatigue.

Serious or Rare Side Effects: - Severe allergic reaction (anaphylaxis): difficulty breathing, swelling of face or throat. - Guillain‑Barré syndrome: rapid muscle weakness. - High fever (>40 °C) lasting more than 24 hours. - Seizures in children. - Persistent vomiting. - Unexplained bleeding or bruising.

Before administering Influvac Tetra, consider the following precautions to ensure safe use. - Contraindication: known severe allergy to any vaccine component: avoid administration. - Precaution: history of Guillain‑Barré syndrome after previous influenza vaccine: evaluate risk‑benefit. - Precaution: moderate or severe acute illness with fever: defer vaccination until recovery. - Precaution: immunocompromised patients: vaccine may elicit reduced immune response. - Precaution: pregnancy: discuss benefits and risks with healthcare provider. - Store at 2‑8 °C: keep refrigerated, protect from light, do not freeze or shake.

Influvac Tetra has limited drug interaction potential, but certain agents may affect its efficacy or safety.

Major Interactions (Avoid): - Live attenuated vaccines: avoid co‑administration within 4 weeks to prevent interference. - Immunoglobulin therapy or blood products: avoid within 2 weeks as they may reduce vaccine response.

Moderate Interactions (Monitor Closely): - Antipyretics (acetaminophen, ibuprofen): may mask fever, use as needed. - Corticosteroids (systemic, high dose): may diminish antibody response, monitor immunity. - Antiviral medications (oseltamivir) started before vaccination: may affect immune response, assess timing.