Mucinex 12-Hour Maximum Strength Chest Congestion Expectorant Tablets, 1200 mg Guaifenesin 56 ct.

Item # 980342998
Current price is $31.98
$0.57/ea
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Highlights

Product is FSA & HSA eligible.

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  • 56 count tablets
  • Long-lasting chest congestion relief starts working immediately
  • Extended-release bi-layer tablet for immediate and extended relief
  • Helps thin and loosen the mucus associated with chest congestion
  • #1 doctor-recommended Mucinex expectorant

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Mucinex 12-Hour Maximum Strength Chest Congestion Expectorant Tablets, 1200 mg Guaifenesin 56 ct.
Mucinex 12-Hour Maximum Strength Chest Congestion Expectorant Tablets, 1200 mg Guaifenesin 56 ct.
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About this item

Product details

No one likes to be sick, but Mucinex 12-Hour Maximum Strength Chest Congestion Expectorant Tablets make every sick day a little easier. Mucus is a master of mayhem. It crowds your nose, throat, and makes you miserable.

Does Mucinex Start Working Quickly?

The best chest congestion medicine provides quick, long-lasting relief. When it comes to chest congestion medicine, Mucinex provides great relief. And that relief is just one dose away. Mucinex expectorant tablets get to work fast and last for 12 hours. Mucinex 12-Hour Chest Congestion Expectorant Tablets give you the relief you need whenever the untimely cold comes your way.

What Does Mucinex Relieve?

Mucinex 12-Hour Chest Congestion Expectorant Tablets relieve chest congestion that's caused by excessive mucus. Mucinex works by thinning and loosening mucus. And with extended-release, Bi-Layer™ tablets, you'll have effective relief for up to 12 hours. Chest congestion occurs when the mucus membranes in your airways are pushed into overdrive. Whether it's the common cold or irritants like dust, your mucus membrane becomes inflamed and causes excess mucus buildup in your airways. The buildup of mucus serves as a way to rid your body of your illness or the irritant you breathed in. Mucinex helps dissolve the mucus buildup so you can breathe normally again.

Active Ingredient

Contains Guaifenesin, which is an expectorant that relieves chest congestion and thins & loosens mucus, making coughs more productive. Guaifenesin (1200 mg) is an expectorant that helps reduce chest congestion caused by colds, infections, or allergies. It works by thinning the mucus in the air passages and makes it easier to cough up.

Stock Up Now

Stock up on Mucinex now. Future you will be very glad you did. Conveniently order your medicine online and have it shipped to your doorstep. Or pick up the Mucinex during your next trip to your local Sam's Club.

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Specifications

  • Use Instructions: do not crush, chew, or break tablet . Take with a full glass of water. adults and children 12 years of age and over: 1 tablet every 12 hours. Do not exceed 2 tablets in 24 hours. Children under 12 years of age: do not use.
  • Pack Size: 56 count tablets
  • Shelf Life: N/A
  • FSA & HSA Eligible: Yes
  • Allergen and Warnings Information: Do not exceed 2 tablets in 24 hours. Children under 12 years of age: Do not use. Do not crush, chew, or break tablet.
  • Ingredients: Active Ingredients: Guaifenesin (1200 mg). Inactive ingredients: carbomer homopolymer type b; fd&c blue no. 1 aluminum lake; hypromellose, usp; magnesium stearate, nf; microcrystalline cellulose, nf; sodium starch glycolate, nf'

*IQVIA using ProVoice Survey, December 2022 U.S. News & World Report/Pharmacy Times 2023-2024.

**Product eligibility may vary by plan. Check with your benefits administrator to determine which expenses are eligible before you shop.

While we strive to obtain accurate product information, we cannot guarantee or ensure the accuracy, completeness, or timeliness of any product information. Carefully read and follow all package directions. SamsClub.com assumes no liability for inaccuracies or misstatements about products.

Member ratings & reviews

4.8 out of 5 stars
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915 ratings207 reviews
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Showing 1-3 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.