Company Names, addresses, dates¹:
  Marion Everly, Triplett building, Mt. Jackson, VA (1906-1929)
  Everly's Drug Store, Triplett building, Mt. Jackson, VA (1930-1946+)
  Everly's Drug Store, 5908 Main Street, Mt. Jackson, VA (1946-ca.1974)
  Mt Jackson Pharmacy, Mt. Jackson, VA (ca.1974-ca.2004) ^1,5

Notes:
Marion Everly Sr. (1869-1927)² passed his pharmacist exam in 1891³.
Everly was an apprentice at Schmitt's Drug Store in Woodstock, VA, and after completing his training, he became the manager of Schmitt's drug store that was in Moorefield WVA. When Schmitt died in 1906, Everly moved to Mt Jackson and purchased John Partlow's drugstore.¹
The location was originaly in the "T.I. Tripplett building"¹. That building no longer exists.

Everly passed away in 1927, and S.G. Good of New Market VA managed the store while Everly's son, Marion Everly Jr. (1905-1992)⁴ was learning to be a pharmacist at the Medical College of Virginia. In 1930 Marion Jr. took over, and changed the name of the store to "Everly's Drug Store". ¹
The building location changed in 1946, when it moved to 5908 Main Street.¹

In May 1974 the store was sold to Mr. Kay Showalter. I don't know exactly what year it happened, but at some point the store got renamed to the Mt Jackson Pharmacy. ¹

Based on the label on the bottle below, this drug store was part of the Rexall chain of drug stores at some point.

This is a clear 3.7" screw-top bottle with a label that says: label: ... / Everly's Drug Store / THE REXALL DRUG STORE / MT. JACKSON, VIRGINIA embossed vertically on back: The / Rexall / Store