How long after you have taken Tamiflu is it still effective?

Can the H1N1 vaccine be taken while taking Tamiflu?

• Answer:

  The injected vaccines (flu shots/jabs) can be taken at the same time as taking Tamiflu or antiviral medications, since they are made from inactivated ("dead") viruses. The antiviral medicine will not make the shot ineffective or vice versa. But, the nasal mist vaccines which are made from live attenuated viruses (weakened viruses that can't make you sick but trigger an immune response) should not be used at the same time as an antiviral medication like Tamiflu, since there is a chance that the antiviral medicine will render the vaccine ineffective. The LAIV (Live Attenuated Influenza Vaccine) relies on the virus in the vaccine to be weak but active to give you the immunity. You should wait 48 hours after stopping the Tamiflu before taking a vaccine that contains the live virus (in the US, this is the nasal mist vaccine).