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Mucinex and Mucus: What Users Say

Mucus: mentioned by 3 users (1.9%)

Based on user experiences from 155 Mucinex reviews, the following table shows the most commonly mentioned side effects.

All user comments are moderated by Drugs.com. Each review is verified for relevance and screened for inappropriate content. Side effects are user-reported and not clinically verified.

cough 6.5%
nausea 5.8%
drowsiness 5.2%
diarrhea 3.9%
dizziness 3.2%
vomiting 3.2%
headaches 2.6%
insomnia 2.6%
pain 2.6%
mucus 1.9%

Reviews for Mucinex

Showing 3 reviews tagged with "mucus". Clear filters to view all 155 reviews.
Commonly mentioned side effects
  • Liz...
  • Taken for less than 1 month
  • April 7, 2022

For Cough "I had a cough with a runny nose. I thought it was going into my chest, so I took a Mucinex D. It made me cough up whatever little bit was in my chest, but made my sinuses and my head so full of mucus I can't breathe through my nose. The Mucinex D made me feel much worse. I’m not taking it again."

2 / 10
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2 Report
  • Nis...
  • Taken for less than 1 month
  • March 2, 2022

For Bronchitis "First, this is not the medicine if you have bronchitis, this condition is the excessive coughing that will make your chest hurt without medicine. Taking guaifenesin, which is the ingredient that loosens phlegm & makes you cough MORE. Bronchitis does NOT need this kind of help, you are coughing as a result of bronchitis. Taking guaifenesin will make you cough up bits of lung tissue along with any phlegm. If your phlegm has red in it - STOP taking this stuff & go see a doctor - you may need to go on antibiotics especially if your bronchitis has not improved after 3 weeks. Take it from me, I waited until 5 weeks & my doc said, 'WHY DIDN'T YOU COME IN SOONER?' I said I thought it would go away, but it didn't. The doc said - lucky I came in when I did, 'cause if I had gone longer - it may have turned into rheumatic fever, which is very dangerous left untreated. Normal phlegm, it's fine for, but if it makes you cough so much you are having your lunch come up - it's too potent, and you need to see a doctor!"

1 / 10
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6 Report
  • Bon...
  • Taken for less than 1 month
  • July 8, 2018

For Cough "I am coughing up all kinds of mucus, and I want to sleep... that's not going to happen. Wish I never took it."

5 / 10
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17 Report

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