Longueuil Police looking for missing 18-year-old

Longueuil Police are looking for 18-year-old Michael Marchand, who went missing on April 22.
He could be in Ontario, where he has family, police say. Police fear for his safety because he must take medication without fail every day. 
The English-speaking Merchant is 5-foot-11 and weighs 180 pounds. He has brown hair and blue eyes.
When last seen he was wearing a black zippered sweater and Adidas shoes.
Anyone with information is asked to contact 911.