The key difference for Dupixent in avoiding FDA safety scrutiny is that it is not a JAK inhibitor. Dupixent is an IL-4 and IL-13 inhibitor, and it does not have the safety risks associated with JAK inhibitors.
Dupixent, offered as both a cream for AD and an injectable for asthma, was responsible for more than $1.25 billion for Sanofi during the first quarter. That marked a 45% quarterly gain year over year, including a 16% gain in prescriptions new to the brand. The company stated during its first-quarter results that high demand was generated from the AD market in adults, adolescents, and children ages 6-11. This is an important takeaway, because AD is common in children, at a rate of 10.7% in the U.S., with 33% of those being considered moderate to severe cases.