Johnson & Johnson said Wednesday it expects 10 new drugs to be launched by 2019—each with the potential to exceed $1 billion in revenue—and plans more than 40 line extensions of existing and new medicines.

"You're going to have some wins and some that don't turn out quite the way you expect," Chairman and CEO Alex Gorsky told CNBC's "Squawk Box" in an interview. "But overall we're very confident ... particularly based on what we've been able to do over the past several years." J&J said it has launched 14 new products since 2009—seven of which already exceed or are on track to achieve sales in excess of $1 billion during 2015.