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Mucinex User Reviews & Ratings (Page 3)

Mucinex has an average rating of 6.2 out of 10 from a total of 155 reviews on Drugs.com. 55% of reviewers reported a positive experience, while 34% reported a negative experience.

Reviews for Mucinex

Commonly mentioned side effects
  • sut...
  • Taken for less than 1 month
  • May 3, 2013

For Cough "Actually, I was using Mucinex to control a nagging nighttime cough. Although I had extreme pain in my ankles and legs EVERY SINGLE DAY, I never dreamed that Mucinex would have any effect in helping that. I took a dose of the Mucinex FastMax just before I went to bed, and WOW, no cough AND no leg pain at all that night, at last, I was pain-free! I know it had to be the Mucinex because absolutely nothing else had made a difference! I will keep some on hand to use from now on. I hope this helps someone else also. Thank you."

10 / 10
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45 Report
  • Anonymous
  • November 7, 2011

For Cough "About an hour and a half after taking one Mucinex DM, I developed severe dizziness, drowsiness, bad intestinal cramps, vomiting, and diarrhea that recurred over a period of 2 hours. It was the only medication in my system."

1 / 10
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54 Report
  • Anonymous
  • Taken for 2 to 5 years
  • October 4, 2020

For Bronchiectasis "Mucinex is great. I was taking all kinds of medications for a pulmonary problem. Went to Mayo Clinic for the problem. I have bronchiectasis and was told to never take an antihistamine but to use Mucinex, a decongestant. I never looked back. When a doctor tells me to take an antihistamine, I say no. One time I took an antihistamine and had problems for three months. Never again."

9 / 10
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24 Report

Frequently asked questions

  • She...
  • February 17, 2018

For Bronchitis "In our home, Mucinex is the go-to when we start getting sinus-y, mucousy, and sickly. It helps fast, glad these products are available! We use the liquid for our 9-year-old, and it usually always works! Thank you, Mrs. Perez."

8 / 10
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28 Report
  • Bar...
  • Taken for less than 1 month
  • September 28, 2019

For Bronchitis "I have moderate COPD. Got some kind of crud (I call it) in my chest and was coughing and so sick. Couldn't cough up anything but knew it was there. Took regular Mucinex generic label. Felt like I was drowning. Post-nasal drip putting fluid in my lungs, and I was drowning. Please go to the doctor if this sounds like you - it turned out I had community-acquired pneumonia."

1 / 10
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31 Report

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  • Hal...
  • October 28, 2015

For Cough "I swear by this stuff. (I'm talking about Mucinex's version of Theraflu, it's fairly new-maybe last year it was put on the shelves.) I have tried nearly every cold remedy in the history of the world, from teas to drugs to more wholesome remedies, but nothing has actually ever worked. This stuff actually reduces the duration of my colds and the severity of colds within the first day. Drink it in the morning and once before bed, and you should be golden in 2 days. I'm more of that summertime cold-getter, and it works like magic every time."

10 / 10
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37 Report
  • Fib...
  • March 20, 2014

For Fibromyalgia "I had a terrible experience with Mucinex. I followed the protocol for just over 1 month, hoping to feel some relief, but I felt really heavy, like I had a bad flu, and had worse pain. I think most people are experiencing relief, so give it a shot; it just didn't help me."

1 / 10
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49 Report

More FAQ

  • Mel...
  • Taken for less than 1 month
  • August 20, 2020

For Bronchitis "I began a cough 4 weeks ago. Then the mucus started. Couldn't get it up. Pharmacy suggested Robitussin, which worked okay, but still needed stronger meds. Dr. put me on steroids and antibiotics. Still mucus choking me. Tried Mucinex 600. Nothing. Made me worse. The coughing started and was horrible for about an hour. I stopped using Mucinex and went back to Robitussin. This drug is not for everyone. Would not recommend."

1 / 10
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  • Jes...
  • April 10, 2017

For Bronchitis "I'm not sure Mucinex works. I know it kept me wide awake. It was hard for me to sleep. When I was awake, I felt like my balance was off, so I felt dizzy. I couldn't go down spiral steps. I would not recommend it."

2 / 10
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42 Report
  • Ren...
  • Taken for less than 1 month
  • September 23, 2020

For Bronchitis "Although Mucinex contains the exact same drugs as Robitussin D, it doesn't work nearly as well for me as Robitussin D. Maybe because the Robitussin is a liquid? Mucinex has spent a lot more money on advertising, but I would choose Robitussin D every time!"

3 / 10
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18 Report
  • rud...
  • Taken for less than 1 month
  • January 2, 2024

For Bronchitis "After struggling for 3 nights with excessive phlegm and trying literally everything (Expectorants etc...) to loosen up mucus, nothing made me have the real improvement that I needed, until I took the first Mucinex tablet and in the hour improvement did occur to my total surprise how effective it was... I am an anti-medicine guy but the situation was suffocating... I just feel sorry for all people who don't know this medicine that is why I write, so that someone will improve as I did... I rate it at 9 because no medicine can be 10 due to possible side effects, BUT NO SIDE EFFECTS FELT FOR ME AFTER 48 HOURS OF USE."

9 / 10
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  • Yoo...
  • Taken for less than 1 month
  • January 10, 2018

For Bronchitis "I'm reading a lot of reports of Mucinex making people feel worse, as is the case with me. The main ingredient apparently thins down your mucus, so basically, while already sick, this medicine gives you a runny nose. I've taken Mucinex twice and both same results."

2 / 10
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  • CJa...
  • Taken for 1 to 6 months
  • November 15, 2018

For Cough "I have had a chronic cough for about 20 years. After many tests for asthma, GERD, and other lung problems, I was diagnosed with neurogenic cough. In other words, they don't know what's causing it. I've tried amitriptyline and a couple of other scripts, didn't do much, and had horrible side effects. I started using the Mucinex 12-hour time release. They calm my cough pretty good. I've been taking them this time for about a month and had my BP checked yesterday by a nurse, and it was 181/98. We checked it twice with her machine and checked it twice with mine. All four readings were in the 180's/90-100+. Now, just a couple of months ago, my reading was 122/78. That is more normal for me. The Mucinex is one of two changes I have made in my life within the last two months. The other was starting the keto diet on September 24th... Has anyone else experienced problems with their BP after taking Mucinex DX? Maybe I'm not drinking enough water. I don't know, but I'm definitely concerned..."

8 / 10
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17 Report
  • med...
  • Taken for less than 1 month
  • February 25, 2023

For Fibromyalgia "I was desperate with severe, throbbing pain, especially at night. I was actually envisioning suicide. In suggesting Mucinex to a friend, I happened to discover that guaifenesin has a moderate muscle-relaxing effect, and then I read some of these reviews. I also read a report of a clinical study that found no effect. Long story short, the women in the clinical study took only 600 mg twice daily, whereas most of the reviewers here seemed to have taken twice that amount. I started doing that too, only yesterday, and today my spasms are largely gone. My conclusion, therefore, is that the clinical study didn't use a large enough dosage."

10 / 10
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  • Kim...
  • Taken for less than 1 month
  • May 19, 2023

"Absolutely terrible medication. Took it one time, only one pill, for a cold and had a severe reaction that has put me in the hospital multiple times. Had severe panic attacks, tremors, the feeling of doom, severe burning throughout my entire body, high blood pressure, and heart palpitations, and felt like I was going to die. I was afraid to sleep. It's been almost 3 months since I last took this medication, and I haven't been right since. It messed with my neurological system and my nervous system. I've been constantly worried about my health ever since. I've seen so many other reviews of people having the same experience. My doctors had no idea what was going on with me, but I knew instantly right after taking this medication that something wasn't right. I can't believe this stuff is legal. Please beware of this medication, especially if you're sensitive to it, and really do your research before trying it. I would rather deal with the cold symptoms than be put through hell like I have been on this stuff."

1 / 10
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11 Report
  • Anonymous
  • August 10, 2009

For Cough "This helped with a nasty cold when other OTC mixtures (with less guaifenesin) did not work. The 600 mg tab has almost no side effects, though once in a while it can make me feel woozy. Made a huge difference in loosening phlegm, helping me sleep, reduced coughing so my vocal cords are not as irritated. Also, my nasal passages cleared up significantly the first day I took it. It's important NOT to split the tab, it is hard to swallow, but it's formulated as sustained-release. It can't do its job over 12 hours unless it is taken whole. Also, drinking lots of fluids (not coffee, tea) does help. Miracle drug (Mucinex)!"

8 / 10
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29 Report
  • Mat...
  • March 24, 2015

For Cough "I have been taking Mucinex for about 5 months... one in a.m. and another at 8 p.m. I took it because I could not swallow any phlegm, and it was difficult coughing it up. My esophagus muscles are very weak, and the phlegm would block my airways. Recently, I have developed severe dry mouth as a side effect. I stopped the p.m. pill and use Biotene gel, toothpaste, and mouth rinse... still no relief. If anyone has had this problem, please let me know."

8 / 10
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32 Report
  • Gra...
  • Taken for less than 1 month
  • July 3, 2021

For Bronchitis "I’ve been using Mucinex to thin and loosen mucus for YEARS now. The one that’s pseudoephedrine and guaifenesin is for sinus congestion, and the other one is for chest congestion. Pseudoephedrine WILL keep you awake, and that’s the one people use that drug to make illegal substances; primarily why you have to go to the pharmacy counter to get it. Guaifenesin is highly effective for loosening mucus and excreting it through nose blowing or coughing. I’ve never had issues with either version of Mucinex when taking them during a sinus infection or bronchitis infection. For a bacterial infection, you’re going to need antibiotics as well, or the bacterial infection will just fester. Like Shrek says, “Better out than in, I always say.” A person’s reaction to meds always differs from another’s experience, but I’ve never had a bad one."

10 / 10
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10 Report
  • Con...
  • December 23, 2016

For Cough "The doctor gave me a sample of this when I complained of congestion. I took two tablets, which may have been too much since I developed the runs. I'll try it again, but only one tablet. Or, I may just get Robitussin since the doctor said that Mucinex is a magnified version of Robitussin."

5 / 10
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21 Report
  • Ear...
  • Taken for less than 1 month
  • February 4, 2018

For Cough "Worked well after I started guzzling water. It did nothing before that. The thing is, nowhere on the liquid Mucinex DM packaging does it say to ensure to drink lots of water. If water is essential to its effectiveness, I’d think the company would want folks to get plenty hydrated. This method, combined with an inhaler to calm coughing spasms, and I feel progress in kicking my flu remnants. Good luck."

9 / 10
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15 Report
  • Joj...
  • Taken for 6 months to 1 year
  • January 13, 2020

For Cough "I use the Mucinex liquid, and I think it works great. I had it as a prescription for my last cold, and this time I got it myself. I also got Alka-Seltzer, thinking that would work. After 3 days of feeling like poo, I took the Mucinex and slept the best I had in three days. I highly recommend this to anyone. I'm only taking it at night because it does make me sleepy. Other than that, I have no problems with this medicine, and it's the best thing I've ever taken for colds."

10 / 10
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10 Report
  • Sta...
  • Taken for 1 to 2 years
  • January 30, 2020

For Bronchiectasis "I have tried all the versions and dosages of this product. They describe it as loosening mucus. It does absolutely nothing! I have now read the tests and found out it doesn't even work better than a placebo. Just wasted a couple hundred dollars. Such is life."

1 / 10
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16 Report
  • jay...
  • November 2, 2017

For Bronchitis "Jayce Wyatt. My chronic bronchitis started out with post-nasal drip and a cough, and I felt tired and turned in early. The next day, the cough got worse, and I felt lousy, so I called in sick. I felt steadily worse for another day, then, on day three, the fever started, and I couldn't sleep for more than an hour or so at a time for a whole week. When I went to the doctor, I was given a Z-Pak, albuterol inhaler (the only thing that did me any good), oral steroids, cough pearls, which didn't do any good, and was told to take Mucinex. In all, the fever lasted six days. I coughed so much I hurt my back and ended up in the emergency room because my back went into such spasms I couldn't move without extreme pain. They shot me full of morphine."

2 / 10
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27 Report
  • Lyd...
  • Taken for less than 1 month
  • December 4, 2024

For Cough "I was taking Mucinex for congestion. I realized two days into taking the medicine that the severe pain I had in my shoulder and hip had subsided. I wondered if this medication had anything to do with my relief, so I looked it up and found this site. Mucinex was very effective in taking care of my congestion as well as my shoulder and hip pain."

10 / 10
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1 Report
  • Gra...
  • March 4, 2012

For Cough "I was advised by a screening nurse to take Mucinex for a particularly persistent cough with a lot of phlegm. After about a week of taking Mucinex, my cough was slightly better, but I noticed that my endometriosis had subsided! I have been suffering from endometriosis for the past 20 years...tried everything (Nafarelin, birth control pills, laparoscopic surgery, pregnancy, Lupron depot, ovariohysterectomy), and nothing helped the pain...I felt like my urinary bladder was under constant pressure, and the only relief was immediately after urinating, but the pain would immediately return. I saw several urologists, and they tried treating me for overactive bladder and interstitial cystitis, but the only definitive diagnosis was endometriosis."

7 / 10
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19 Report

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Reviews may be edited to correct grammar/spelling or remove inappropriate content. Reviews appearing to come from parties with a vested interest are not published. This information is not intended to endorse any medication and should not replace the expertise and judgment of healthcare professionals.