Relenza is an antiviral medication containing the active ingredient zanamivir, which is used to treat and prevent influenza (flu) infections. Zanamivir is a neuraminidase inhibitor, meaning it works by blocking the action of the neuraminidase enzyme on the surface of the influenza virus. This enzyme is essential for the virus to spread and infect other cells in the body. By inhibiting neuraminidase, Relenza helps reduce the severity and duration of flu symptoms.
Product Highlights
Relenza is used to treat acute influenza in individuals aged 7 years and older who have been symptomatic for no more than 48 hours.
It is also indicated for preventing influenza in individuals aged 5 years and older, especially after exposure to someone with the flu.
Key Ingredient
Zanamivir
Key Benefits
Relenza can significantly reduce the severity and duration of influenza symptoms, such as fever, cough, sore throat, and body aches.
When taken early in the course of infection (within 48 hours), Relenza is most effective at minimizing flu symptoms and complications.
In addition to treatment, Relenza can be used to prevent influenza in people who have been exposed to the virus, reducing the likelihood of developing the flu.
Administered directly to the lungs via inhalation, which helps target the virus where it replicates.
Direction of Use
Relenza is administered using an inhaler device, typically twice daily for 5 days when treating flu symptoms.
For prevention, it is inhaled once daily for 10 days after exposure to the virus.
Follow the instructions for inhalation carefully. The powder should be inhaled deeply, not swallowed, to ensure it reaches the lungs.
Do not use Relenza as a substitute for the flu vaccine, as it is not a preventive measure for long-term immunity.
Indication
Dose
Treatment of Influenza
10 mg twice daily for 5 days
Prophylaxis: Household Setting Community Outbreaks
10 mg once daily for 10 days 10 mg once daily for 28 days
Safety Concerns
Relenza can cause bronchospasm, especially in individuals with underlying respiratory conditions like asthma or chronic obstructive pulmonary disease (COPD). Caution is advised in these patients.
Rare allergic reactions, including rashes, swelling, and difficulty breathing, can occur.
Relenza is specifically for influenza and should not be used for the common cold or other respiratory infections.
Possible side effects include headache, dizziness, and gastrointestinal issues like nausea and diarrhea.
Avoid Relenza (Zanamivir) If
Avoid Relenza if you have a history of asthma, chronic obstructive pulmonary disease (COPD), or any other respiratory condition that could be aggravated by the inhalation of the medication.
Do not use Relenza if you are allergic to zanamivir or any of the other ingredients in the product.
Relenza is not recommended for use in children younger than 5 years for prevention and younger than 7 years for treatment due to the risk of complications.
If you have significant kidney problems, consult your healthcare provider before using Relenza, as it may require dose adjustments.
