FDA is warning that Ibrance (palbociclib), Kisqali (ribociclib), and Verzenio (abemaciclib) used to treat some patients with advanced breast cancers may cause rare but severe inflammation of the lungs.

http://www.fda.gov/safety/medwatch-safety-alerts-human-medical-products/ibrance-palbociclib-kisqali-ribociclib-and-verzenio-abemaciclib-drug-safety-communication-due-rare