Page 1 - Reviews - Mucinex, Mucinex DM, 40 Extended-Release Bi-Layer Tablets - iHerb
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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorized distributors.Show more
4.8
Based on 72 ratings
63
4
5
0
0
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What customers say
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English
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iHerb customer
Posted on Mar 21, 2025
Canada
8
0
1
0
can't find this product in Canada
Verified purchase
this is great to have this product brought to canada through Iherb's shipping. I used it in the US once for a bad cold, and was looking for it here. The brand new is sold in Canada, just not this specific product.
iHerbCustomer
Posted on Aug 16, 2024
Canada
259
0
4
33
So-so
Verified purchase
It's not as effective as I thought, but it works a little.
Auto-translated from Chinese Simplified
iHerb customer
Gold
Posted on Nov 3, 2025
United States
1,105
0
0
63
Verified purchase
I typically use it at the first sign of symptoms (e.g. itchy throat, runny nose, slight cough, sneezing that’s not allergy related, etc). It’s helped stop the symptoms from getting worse. Easy to use since it’s every 12 hours and no drowsiness.
iHerb customer
Posted on Jun 2, 2026
14
0
0
1
Potent pill, but not suited for NMDA antagonism
Verified purchase
The extended release formula of DXM doesn't make it suitable for OTC NMDA antagonism in my experience, – as I anticipated when ordering this... The expectorant is as expected. The dosage is high enough to reach a serum concentration that actually provides therapeutic value. Small pill, massive dosage, good ROI. The pills taste absolutely horrendous when chewed, which I guess is the expectorant. The weird pungent bitter taste lingers for over 10 minutes despite doing everything in my power to clean out my mouth. The smell is a toned down version of the bitter taste, totally acceptable. Not comparable to the bitter atrocity when accidentally biting the pill. Overall: perfect product to save for when I get sick, but not suited for NMDA antagonism.
iHerb customer
Posted on Jan 4, 2025
Korea, Republic of
41
0
0
2
Does it’s job
Verified purchase
I had a terrible cold for a long time and a cough that was very debilitating. I could not get rid of it even after being prescribed meds. Took these and my cough was kicked out of me wi the in 2 days. It’s great to use these and the size and amount is decent for the price. It’s also effective and great to rely on when you are tired of being neg sick and need to get the ick out of you.
iHerbCustomer
Posted on Nov 29, 2024
United States
22
0
0
8
Verified purchase
I recently tried Mucinex DM, and I’m so glad I did! This product has been a lifesaver during cold and flu season. The combination of dextromethorphan and guaifenesin really works wonders — it helps clear out mucus while also suppressing my cough. I’ve noticed a significant reduction in both congestion and coughing fits, which allowed me to rest better and get back to feeling like myself sooner. What I really appreciate is how effective it is without making me feel groggy or overly drowsy, unlike some other cold medications. It’s easy to take, and the relief lasts for hours. If you’re dealing with a stubborn cough or chest congestion, Mucinex DM is definitely worth trying — it’s become my go-to for respiratory relief!
iHerb customer
Posted on May 2, 2026
Israel
14
0
0
0
Excellent product!
Verified purchase
I appreciate being able to order Mucinex from iHerb, as I do not live in the US and it is not available in my country. I use it daily.
iHerb customer
Posted on Aug 27, 2025
United States
18
0
0
0
My go to!
Verified purchase
Always my go to when feeling congested! Can’t go wrong!
iHerb customer
Posted on Jul 25, 2025
Croatia
9
1
0
0
Great product
Verified purchase
and it really helped clear my chest and ease my breathing. I felt much better within a couple of days. I was also pleasantly surprised how quickly it arrived in Croatia,faster than expected. Highly recommend for anyone dealing with cold or flu symptoms!
iHerb customer
Posted on May 15, 2025
Korea, Republic of
20
0
0
0
Lifesaver
Verified purchase
Literally I hate coughing my lungs out and this helps me combat that as well getting rid of the phlegm. The size of the pill is big but you get used to it.