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Mucinex and Headaches: What Users Say

Headaches: mentioned by 4 users (2.6%)

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

Commonly mentioned side effects
  • cou...
  • December 6, 2010

For Bronchitis "Made coughing a lot easier after feeling like I was going to die from the phlegm that was blocking my air passage. I didn't give it a full 10 because it gave me a slight headache and a bit numb/tingling feeling all over my body but nothing to be alarmed about. Oh my goodness what a difference. I can breathe and finally sleep knowing I'm not going to choke to death. Thank you Mucinex."

9 / 10
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116 Report
  • Sic...
  • June 9, 2013

For Cough "I had a runny nose, blocked ears, headache, and sore throat with mucus. It's great! I took one pill and saw relief, so 4 hours later I took the second one. Now I am wide awake. It's almost 4 AM. Take it earlier."

10 / 10
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66 Report
  • 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

Frequently asked questions

  • Cho...
  • October 14, 2017

For Bronchitis "I had tried this product in 2005, and it was not effective. So I gave it another chance to so-called redeem itself. Well, this is definitely not for me, it made me feel worse. I developed a headache."

1 / 10
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11 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.