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Customer reviews for Mucinex 12-Hour Maximum Strength Chest Congestion Expectorant Tablets, 1200 mg Guaifenesin 56 ct. for
Mucinex 12-Hour Maximum Strength Chest Congestion Expectorant Tablets, 1200 mg Guaifenesin 56 ct.
4.8 out of 5 stars
stars910 ratings207 reviews
  1. 5 stars88% (803)
  2. 4 stars9% (78)
  3. 3 stars2% (15)
  4. 2 stars1% (5)
  5. 1 star1% (9)
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Showing 1-10 of 207 reviews
Aug 2, 2025
CheriD
5 out of 5 stars review

Verified Purchase

Brand Name has better packaging

I prefer the Members Mark generic for its lesser price but can’t punch the tablets from out of the blister pack with the rheumatoid arthritis in my hands. Pay a higher price for the brand name to get easier to use blister packs. Wish they were still loose tablets in a bottle.

Helpful?17EBOSXSKNBS13599620720
Jan 17, 2026
Gin
5 out of 5 stars review

Verified Purchase

Works

Stopped my cough by loosing the mucous. I take it whenever I get stuffed up or the wheezing starts. Works so well and I depend on it to bring me thru this flu season.

Helpful?17EBOSXSKNBS13599620720
Apr 24, 2026
SAS
5 out of 5 stars review

Verified Purchase

Sinus season remedy

This is the only product that actually works. I take 2 a day AM & PM for 2 wks.

Helpful?17EBOSXSKNBS13599620720
reply from Mucinex Team

We would like the chance to speak with you about your usage of our Mucinex® product. When you have a chance, please give us a call at 1-866-529-8804. We are available Monday to Friday from 9am until 5pm, EST. When calling, kindly refer to reference# 8314131.

Jan 23, 2026
IC
5 out of 5 stars review

Verified Purchase

Cold remedy

Great product at a amazing price..

Helpful?17EBOSXSKNBS13599620720
Sep 23, 2025
Precious3
5 out of 5 stars review

Verified Purchase

Great product

Great product for sinuses

Helpful?17EBOSXSKNBS13599620720
reply from Mucinex Team

We would like the chance to speak with you about your experience with Mucinex® SE. When you have a chance, please give us a call at 1-866-529-8804. We are available Monday to Friday from 9am until 5pm, EST. When calling, kindly refer to reference# 7268553.

Jan 11, 2026
Anonymous
5 out of 5 stars review

Verified Purchase

Fantastic Product!

Works perfectly with great instructions. Highly recommended for congestion.

Helpful?17EBOSXSKNBS13599620720
Sep 15, 2025
Dr Pepper
5 out of 5 stars review

Verified Purchase

Full strength but is it worth the extra cost

Good stuff, but more expensive than the Members Mark generic. Mucinex indicates a two phase effect but I haven't really noticed a difference.

Helpful?17EBOSXSKNBS13599620720
reply from Mucinex Team

We would like the chance to speak with you about your experience with Mucinex® SE. When you have a chance, please give us a call at 1-866-529-8804. We are available Monday to Friday from 9am until 5pm, EST. When calling, kindly refer to reference# 7222725.

Jan 9, 2024
Kurtdm1
4 out of 5 stars review

Verified Purchase

Best on the shelf…

Best on the shelf for loosening up mucus in your lungs. I have one working lung and disabled for the rest of my life, I have to worry about fluid build up in my lung. All my doctors recommend Mucinex to help me breathe healthy and stay healthy. When I get pneumonia and have to go to the hospital, Musinex is what the doctors prescribe to help me get healthy along with restricted prescriptions. Thank you Mucinex for helping me breathe better!

Helpful?17EBOSXSKNBS13599620720
reply from Mucinex Team

Hi there! We would like the chance to speak with you about your experience with Mucinex® SE. When you have a chance, please give us a call at 1-866-529-8804. We are available Monday to Friday from 9am until 5pm, EST. When calling, kindly refer to reference# 3359657. Thank you.

Feb 1, 2026
Judy
1 out of 5 stars review

Verified Purchase

I had ordered the wrong one on this so I took it back to store and ordered the right one but we take this every night before bed and it keeps us from coughing so much at night

Review from walmart.com
Helpful?17EBOSXSKNBS13599620720
Nov 1, 2023
Susan Rich
1 out of 5 stars review

Verified Purchase

Make it right

I never received order and tried at least 3 times, management was to get in contact with me but I still have not heard back from anyone. Was in contact with Sam’s club at least 3 times. Not sure if it’s a production issue with employees needing to get numbers or what…..

Helpful?17EBOSXSKNBS13599620720