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Mucinex and Vomiting: What Users Say

Vomiting: mentioned by 5 users (3.2%)

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 5 reviews tagged with "vomiting". Clear filters to view all 155 reviews.
Commonly mentioned side effects
  • 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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  • 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
  • Anonymous
  • Taken for less than 1 month
  • January 6, 2025

For Cough "I highly recommend drinking large amounts of water with this medication. I was not aware to do so because it was nowhere to be found on the label, and it resulted in vomiting and the runs. After hours of this and speaking with a nurse, I was able to get it under control. Will not ever take again."

3 / 10
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0 Report

Frequently asked questions

  • Anonymous
  • October 20, 2014

For Cough "I've been up for hours, throwing up and having diarrhea after taking this."

2 / 10
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61 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.