Keyword: Toujeo

4. Levemir

Levemir has long lived in the shadow of Sanofi’s megablockbuster Lantus, but it has chugged along, putting up blockbuster sales year after year for Novo Nordisk, with $2.54 billion last year worldwide, $1.82 billion of that in the U.S.

1. Lantus

Lantus has led the way, both in diabetes sales and in Sanofi sales, for years now, pumping out more than $7 billion worldwide for the company at its peak. But now, for the second year in a row, sales of Lantus dropped year over year in 2016.