Amazon and PillPack announced on Thursday that they have entered into a definitive merger agreement under which Amazon will acquire PillPack. PillPack is an online pharmacy that delivers medications in pre-sorted dose packaging, coordinates refills and renewals, and makes sure shipments are sent on time.

“PillPack’s visionary team has a combination of deep pharmacy experience and a focus on technology,” said Jeff Wilke, Amazon CEO Worldwide Consumer.

“PillPack is meaningfully improving its customers’ lives, and we want to help them continue making it easy for people to save time, simplify their lives, and feel healthier. We’re excited to see what we can do together on behalf of customers over time.”

PillPack has a license to operate in all 50 states in the U.S.