A Shoppers Drug Mart in Elmira, a few km north of Kitchener, has filled a prescription for the antidote to fentynal with fentynal itself. The astounding mistake was caught before the prescription recipient had an occasion to need the antidote, which is known as naloxone. The prescription for an overdose kit. This occurred February 5 and the Ontario College of Pharmacists has launched an investigation. “The pharmacy is fully cooperating and we are confident that immediate action has been taken to begin to determine how this happened and how it could have been prevented,” the College said Saturday. Naxolone is administered as nasal spray or injection and is available free at many pharmacies. Loblaw Companies Limited, which acquired the Shoppers Drug Mart pharmacy chain in 2013, called the incident “a case of human error” that “absolutely should not have happened.”“Our local pharmacist-owner took immediate action to ensure consumer safety, visiting the customers to secure the product and provide the correct medication, and to offer a detailed apology,” company spokesperson Catherine Thomas told CTV.