You have to see a pharmacist to get naloxone, a medication that is used as an antidote for opioid overdose. In Québec, naloxone is available free of charge and without a prescription at any pharmacy.
However, some pharmacies order naloxone when someone asks for it. They can provide it within 24 to 48 hours. Other pharmacies keep the medication in stock. To find a pharmacy near you that has naloxone anytime: