 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] anamivir may also be used to prevent the flu if you have been exposed to someone who already has the flu (such as a sick household member) or if there is a flu outbreak in the community. Talk to your doctor for more details.This medication works by stopping the flu virus from growing. It is not a substitute for the flu vaccine.If you have the flu, zanamivir does not reduce the risk of giving the flu to others. How to use Relenza Blister, With Inhalation Device Read the Patient Information Leaflet provided by your pharmacist before you start using zanamivir and each time you get a refill. Learn all usage instructions. If you have any questions, ask your doctor or pharmacist. For flu treatment: inhale this medication through your mouth as directed by your doctor, usually 2 inhalations (1 blister per inhalation) twice a day (about 12 hours apart) for 5 days. If possible, on the first day of treatment, take two doses (2 inhalations each), waiting at least 2 hours between doses. For flu prevention: inhale this medication through your mouth as directed by your doctor, usually 2 inhalations (1 blister per inhalation) once a day. The usual </s>