Click the link below, and you will find this hidden WebSaver Canada coupon for $4 off the purchase of Mucinex.
The link worked for me when I pasted it into a new browser, so that means it should work for you as well. If you some reason it does not and you are unable to print it, I originally found the coupon through a Facebook ad. Keep and eye out for the ad, or try to get it to come up by googling Mucinex, liking Mucinex Canada, etc.
Although their flyer does not show the in store price, Shoppers Drug Mart Canada has Mucinex expectorant tablets 20’s-40’s on sale for up to 15% off until Friday, with a bonus or 3000 PC Optimum points when you buy two.