Enbrel could still be in your system due to its half life:

Quote:
Etanercept imitates the effects of the naturally occurring soluble TNF receptors. However, as TNF is a fusion protein, rather than a simple TNF receptor, it has a much longer half-life in the bloodstream. In other words, etanercept has a longer-lasting effect in the bloodstream than the naturally occurring soluble TNF receptors.

http://www.medicalnewstoday.com/articles/180143.php


Timo