As of 2015, a Facebook webpage is available that is dedicated to Mucinex coupons. Coupon Cabin and Coupon Sherpa also offer several Mucinex coupons. Many of the coupon offers require users to shop at a particular store or join a mailing list.
As of December 2015, multiple coupons are available for Mucinex products. For example, one offer requires a user to sign up for RiteAid.com's promotional emails. Some other coupons available on the website can only be used at Costco, Amazon.com with subscription or BJ's.
A Facebook community webpage is dedicated to providing Mucinex coupons, and the offers listed on the webpage link to a printable coupon website called Bargain Bin Betty. It appears to print the coupons, and users need to sign up for a mailing list with dailygrocerycoupon.com.