In Cooks student lodging you can see "Chris Loves-" and a picture of a goldfish. This is an indication that this room previously belonged to Chris from the first generation of Skins.
While the medication Tony is prescribed during the previous series is fictional, those that JJ takes (with the exception of "STUN"), risperidone, olanzapine, and dextroamphetamine, are actual drugs used to treat the conditions his character has.