Trulicity is a diabetes medication that helps the body to release its own insulin instead of relying on injections. The ‘Declarations’ campaign launched in 2017, and by June of 2018 the brand had rocketed to $1.46 billion in sales – a 71% increase from the previous year. The Motley Fool predicts that Trulicity will become the top-selling diabetes drug in the world by mid-decade, reaching $4.6 billion dollars in sales by 2024.