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 prevents influenza infection caused by specific B virus strains in eligible individuals.

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 influenza caused by specific virus strains.

- Influenza B/Phuket/3073/2013-like strain: prevention of influenza infection caused by this strain - Influenza B/Austria/1359417/202-like strain: prevention of influenza infection caused by this strain - Seasonal influenza (quadrivalent formulation): broader protection against circulating influenza 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 temperature rise - Headache: mild headache 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 post‑vaccination - Seizures: uncommon neurologic event - High fever: temperature > 39 °C persisting beyond 48 hours - Severe allergic reaction: hives, swelling of face or throat - Vasovagal syncope: fainting episode after injection

Precautions should be observed before administering Influvac Tetra.

- Allergy assessment: avoid in persons with severe allergy to any vaccine component - History of Guillain‑Barré syndrome: evaluate risk and discuss with healthcare provider - Pregnancy: consult a healthcare professional; vaccine may be used if benefits outweigh risks - Immunocompromised patients: may have reduced immune response; monitor effectiveness - Age restrictions: approved for individuals aged 6 months and older - Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake

Potential interactions with other medicines or vaccines should be considered.

Major Interactions (Avoid): - Live attenuated influenza vaccine: do not co‑administer with this inactivated vaccine - Immunoglobulin therapy: may diminish vaccine efficacy if given concurrently

Moderate Interactions (Monitor Closely): - Antipyretics (e.g., acetaminophen, ibuprofen): may be used for fever but could slightly blunt antibody response - Immunosuppressive drugs: monitor immune response and consider timing of vaccination - Other vaccines: can be given at separate anatomical sites on the same day