FedEx and national drugstore chain Walgreen Co. said yesterday that they are collaborating on a FedEx package pickup and drop-off services, which are now available at more than 7,500 United States-based Walgreens stores. The companies said this announcement comes on the heels of a long-term alliance agreement announced earlier this year “to offer convenient access to FedEx pickup and drop off at thousands of Walgreens locations across the country.”