The FIA will become a signatory to the World Anti-Doping Code at the end of 2010. As a result, new anti-doping regulations will be issued in January 2011, ensuring the FIA works in harmony with the World Anti-Doping Code.
Considering that there is no effective system in F1 to regularly test the drivers there could be all kind of surprises if they go into the new season with procedures that are done in other sports. F1 drivers probably do not even know what kind of medication they must avoid to remain negative.
Imagine the scandal if a driver is treated for a problem not knowing what to avoid and in March they find something and disqualify him. Some substances remain in the body for many months.