Understand Why Semglee Will Be "Interchangeable" With Lantus

You'll hear more about "interchangeable" biosimilars...now that Semglee (insulin glargine-yfgn U-100) is the first with this designation.

A biosimilar has to show similar safety, purity, and potency as its original, or "reference," biologic. But biosimilars aren't generics...it's impossible to create an exact copy of the biologic.

That's because biologics are made from living organisms and contain larger, more complex molecules than most traditional drugs.