My semi-rural county has a separate transit system for this population. You call on scheduled days to go to the grocery, pharmacy, medical center, etc. On pharmacy day they then pick up everyone who scheduled, at their house like a school bus, and go the pharmacy for however long it takes to let everyone do their business before returning them home.
To be honest, I have no idea. I don’t know all the particulars, just the broad strokes and that my couple elderly neighbors that use it seem to really value it.