Had an ra flail up. my humira expired may 2016 any danger taking it or is it just not as effective?

Not a good idea: Expired medications, especially biologics, could both be less effective and unsafe. If the protein of the Humira has broken down, it might create antigens that could stimulate your immune system inappropriately. Non-expired Humira would avoid these potential issues.

You can: develop antibodies to humira, called blocking antibodies! This process can diminish the effectiveness with time! They can be measured by a blood test!