I've used this with no problems. It doesn't say that it's medicated on the bag, though. The tag on the bags I get just says Purina Game Bird Startena. For starting pheasants, quail, chukars, mallards, turkeys, and other exotic game birds.
Purina didn't always have 'medicated' written on the bag, they just started that recently. Read the ingredients and see if it lists Amprollium. I think the label on the chick starter used to have something like % MP at the top. I don't use medicated feed so I can't be sure. The medication (usually Amprollium) just makes Thiamine unavailable to coccidia so it can't survive.
Every year I have the feedstore folks tear the PAPER TAGS from the bags of the 4 types of Purina Gamebird sold (like to compare for any changes - tags aren't posted on the web - only the `guaranteed analysis').
Unless Purina is introducing something new in Iowa, the Startena sold, here, has never been offered with Amprolium.