Public health officials in Grey Bruce are warning of an increase in drug overdoses. According to the health unit, there were 10 overdoses between Feb. 25 and March 1 in Owen Sound, West Grey, Hanover, Walkerton, Port Elgin, and South Bruce Peninsula. The suspected substance was fentanyl in three cases and an unknown white substance in one case. Health unit officials said those who were given naloxone were responsive to treatment and encourage all people who use drugs to have naloxone on hand, and to always have a sober friend with them who can administer it and call 911 in case of an overdose. Naloxone is available at pharmacies, participating community partners, and at Grey Bruce Public Health Mon-Fri, 8:30 a.m. to 4 p.m., no appointment is needed. Tips for users