Regional police responded to a reported robbery on July 10 at a pharmacy on Courtland Avenue East in Kitchener.
Police say a suspect approached an employee and said he had a weapon, then demanded narcotics.
He is described as white, 20-30 years old, and was wearing a Toronto Blue Jays ball cap, denim shorts, a dark brown golf shirt, sunglasses and running shoes.
The suspect fled the scene and was last seen walking towards Shelley Drive.
Police are asking anyone with information to call police.