The pill imprint IG 213 is in fact 50mgs of Sertraline. I actually had my script filled with those and thought they were "purple footballs" (Xanax), but I looked a little closer and noticed that the numbers weren't normal. So I looked them up online as well and found out to my dismay that Sertraline 50mg is a generic of Zoloft used for depression. Of course, it had me fooled.