This is not the first paid delivery of any kind from UPS. The company has an agreement to provide medical tests between the WakeMed facilities in Raleigh. It is a commercial scheme over areas that are under the control of a company. Now it flies in residential areas and delivers to everyday people. Alphabet's Wing already supplies medicine as part of a pilot program, but it is limited to medical without medicine, gifts and snacks.
It's not exactly a thriving business with just two deliveries. However, it is still a significant milestone. Deliveries point to a future where you do not have to go to the pharmacy, or else wait for a courier to complete their usual rounds ̵