Does an influenza vaccine interact with other medications?

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The effect of influenza vaccines on other medications is very small. The metabolism of phenytoin, theophylline and warfarin may be slightly affected by an influenza vaccine. Despite these effects, there are no known harmful drug interactions that occur with influenza vaccines. People with weak immune systems, including those who take medications that weaken or suppress the immune system, such as corticosteroids, may not obtain the same degree of immunity to the flu virus as healthy people.

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Vaccines work to protect your body against germs. Because of vaccines, many of the diseases that can cause severe sickness, handicaps and death have been eradicated. Learn more from our experts about vaccines.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.