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Can TamiFlu Protect Against the Flu?

How to Stay Healthy As the Flu Season Rages

Mia West
January 17, 2024
Medically-reviewed and fact checked by Ryan Lester, PA-C

As is typical for the colder months, people are dropping like flies from the flu, especially after overexposure to the virus during the holidays and new year celebrations. However, the CDC has reported a significant spike in cases this season due to low vaccination rates with 14 million cases and nearly 10,000 deaths occurring by the first week in January 2024. For those who elected to skip the vaccine this year or simply haven’t found the time, it's not too late since the flu season peaks December through February but can run as long as May. If you prefer to take your chances, there is one other potential course of action besides masking up and reinforcing your immune system - Tamiflu, also known as oseltamivir.

How Tamiflu Works

An antiviral medication primarily used to treat and prevent influenza (flu) A and B viruses, Tamiflu works by inhibiting the activity of the neuraminidase enzyme found on the surface of influenza viruses. Neuraminidase plays a crucial role in the release of newly formed virus particles from infected cells, facilitating the spread of the virus within the respiratory system. By inhibiting this enzyme, Tamiflu can slow the replication and spread of the influenza virus.

The medication is available in both oral capsule and liquid formulations, making it convenient for various age groups and is approved for ages 2 weeks of age and older, as well as pregnant women. It is important to note that Tamiflu is most effective when administered early in the course of influenza infection, ideally within 48 hours of symptom onset.

Tamiflu's Efficacy

The efficacy of Tamiflu has been a subject of extensive research and debate within the medical community. Studies have shown that Tamiflu can reduce the duration of flu symptoms such as weakness, headache, fever, cough, runny or stuffy nose, and sore throat by approximately one day when taken promptly after symptom onset. he medication  may also help prevent flu complications although this is still under debate amongst specialists and researchers. 

In addition, Tamiflu is used as a preventive measure in people exposed to the flu, but before flu symptoms have surfaced. It is often prescribed to those who are at a higher risk to develop severe, complicated, or progressive illness.

However, it is crucial to manage expectations regarding Tamiflu's effectiveness. The medication is not a cure for the flu but rather a tool to mitigate symptoms and possibly prevent complications. Its efficacy can vary depending on factors such as the specific influenza strain and the timing of administration.

Potential Issues and Considerations

While Tamiflu has proven beneficial in many cases, it is essential to be aware of potential issues associated with its usage. Side effects may include nausea, vomiting, and headache, though these are generally mild and temporary. In rare cases, more severe side effects such as allergic reactions may occur, warranting immediate medical attention.

One significant consideration is the emergence of influenza strains that may exhibit resistance to Tamiflu. Additionally, individuals with certain medical conditions or allergies should consult their healthcare providers before using Tamiflu to ensure its safety and suitability for their specific situation.

Navigating the Flu Season

Key takeaway: Tamiflu is not a substitute for the flu vaccination. For those who may contract the flu despite preventive efforts, it has the potential to manage symptoms and prevent complications if started in the right window. According to the CDC, the single best way to reduce the risk of seasonal flu and its potentially serious complications is to get vaccinated each year, but good health habits like optimizing your sleep, nutrition, exercise, and stress will pay the biggest dividends in the long run. If you are feeling sick, covering your cough and washing your hands often can help stop the spread of germs and prevent respiratory illnesses like influenza. And most importantly, protect others by staying home if you’re sick.


Join millions of men and women who are improving their health by ordering the Wellcore At-Home Assessment Kit today.

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About the Author

Mia West

A former journalist, Mia brings a high energy approach to communications rooted in insights, culture and brand DNA. She is driven by helping brands crystalize their story and foster meaningful, emotional connections with audiences. Over the years she has collaborated with prominent brands such as Petco, Keurig Dr Pepper, Jaguar Land Rover, Revlon, and Procter & Gamble Beauty, as well as many others in the retail, health & wellness, beauty, lifestyle, and sustainability realms. A California native, she lives in San Diego with her family at the beach.

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