Nasal Flu Vaccine for Adults
Medically reviewed by Drugs.com. Last updated on May 4, 2025.
Several types of viruses cause the flu. The viruses change over time, so new vaccines are made each year. Get the vaccine as soon as recommended each year, usually starting in September or October. The vaccine begins to protect you about 2 weeks after you get it. The vaccine may cause mild symptoms, such as a fever, headache, and muscle aches. You may still get the flu after you receive the vaccine.
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DISCHARGE INSTRUCTIONS:
Call your local emergency number (911 in the US) if:
- Your mouth and throat are swollen.
- You are wheezing or have trouble breathing.
- You have chest pain or your heart is beating faster than normal for you.
- You feel like you are going to faint.
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Seek care immediately if:
- Your face is red or swollen.
- You have hives that spread over your body.
Call your doctor if:
- You feel weak or dizzy.
- You have questions or concerns about the flu vaccine.
Follow up with your doctor as directed:
Write down your questions so you remember to ask them during your visits.
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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.
Further information
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