Company Names, addresses, dates:
  North Side Drug Store, 631 N. Main St., Danville VA (c.1917) ¹

Notes:
The 1917 Danville City directory lists the "McFalls North Side Drug store", so apparently this was one of the McFalls Drug Stores.
The Danville City Directories I have access to are limited - I see this drugstore in the 1917 directory but not the 1908 or 1921 directories, so the years it was in business are somewhere between those 2 years (1908-1921).

More information about Danville drug stores is available at rdricketts blog.

Bottles:

Clear 4.4" bottle embossed: vertical: North Side / DRUG STORE / DANVILLE, VA. base: C.L.G.CO.