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Mucinex and Nausea: What Users Say

Nausea: mentioned by 9 users (5.8%)

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 9 reviews tagged with "nausea". Clear filters to view all 155 reviews.
Commonly mentioned side effects
  • mel...
  • February 23, 2014

For Bronchitis "Took this medication for a chest cough before I went to bed. Woke up in the night with severe nausea and felt dizzy. Tried it again a week later and the same happened. I know other people who swear by it."

3 / 10
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72 Report
  • sy9...
  • Taken for less than 1 month
  • January 2, 2016

For Cough "I would give this a zero out of ten if it was possible. I rarely get sick, but I have been having a lot of trouble with a runny nose and coughing up mucus. This 'medicine' doesn't do anything. Not only does it taste terrible, but it's useless. Followed instructions, and I'm on day 7 with the same problems. Avoid this stuff."

1 / 10
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29 Report
  • Pup...
  • Taken for less than 1 month
  • May 16, 2016

For Cough "I took this attempting to get rid of a cough and chest congestion. I am a 105 lb 30-year-old female. I took one pill yesterday and felt a little better. That was a half dose, so today I tried 2 pills, a full dose. After feeling nauseous for several hours, I finally threw up several times and am feeling much better. I will not be taking it again and would rather allow the congestion to run its course."

5 / 10
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14 Report

Frequently asked questions

  • Sky...
  • December 29, 2022

"When I first started using Mucinex, an oval-shaped pill, about seven years ago for cough congestion, they worked great. As the years progressed, whenever I had similar symptoms, Mucinex worked less and less. I switched to the liquid formula about three years ago with the same results. I am on day three of using Mucinex congestion and cough medicine. I will never take this medicine again because I feel a lot worse after starting it. I can't sleep because of excessive coughing that I didn't originally have, headache, which I rarely get, and nausea. Not worth it. I'll try home remedies the next time."

2 / 10
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0 Report
  • Anonymous
  • October 31, 2011

For Cough "I took one tablet 12 hours ago and have been feeling very sick ever since. My nose is running, coughing, and feeling terrible, as if I had a bad cold. Not taking any more!"

1 / 10
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27 Report

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  • Anonymous
  • April 11, 2011

For Cough "This medicine made me sick. I took one 12-hour slow-release tablet with a large glass of water, and it's a week later, and I still feel nauseated."

1 / 10
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28 Report
  • Jo7...
  • January 15, 2017

For Cough "Gave me diarrhea, dizziness, nausea, stomach cramps, and even some numbness in tongue/face. Worse than the cough. Never again."

1 / 10
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21 Report

More FAQ

  • Tin...
  • September 7, 2021

"I took Mucinex Cold & Flu, and it works, but it made me have diarrhea, severe stomach problems, and nausea."

1 / 10
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3 Report
  • mrs...
  • Taken for less than 1 month
  • May 4, 2022

For Bronchitis "Took Mucinex once yesterday and was fine but a bit nauseous from it, even with food, today the second dose made me throw up and feel absolutely awful within an hour. Would not recommend."

1 / 10
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2 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.