DEERFIELD, Ill.--(BUSINESS WIRE)--Walgreens today officially launched its app for Apple Watch that helps people take medications as prescribed through the easy-to-use Pill Reminder and Refill Reminder features. Medication non-adherence is an important issue that adds an estimated $300 billion a year to medical costs in the U.S. The Walgreens App for Apple Watch is currently one of only a few apps that addresses this issue by prompting users to adhere to medication regimens and reminding them wh