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Delsym 12 Hour Cough Relief and Increased Heart Rate: What Users Say

Increased heart rate: mentioned by 3 users (7.3%)

Based on user experiences from 41 Delsym 12 Hour Cough Relief 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.

diarrhea 29.3%
nausea 17.1%
dizziness 12.2%
gas 9.8%
cough 7.3%
increased heart rate 7.3%

Reviews for Delsym 12 Hour Cough Relief

Showing 3 reviews tagged with "increased heart rate". Clear filters to view all 41 reviews.
Commonly mentioned side effects
  • Emm...
  • Taken for 1 to 6 months
  • May 25, 2019

For Cough "I have taken Delsym ever since I was young (for colds). I have asthma, so a cold isn’t just a cold for me, but every time I have taken it has resulted in nausea, vomiting, extreme dizziness, fast heartbeat, and shakiness for about 2 days. I later learned that the ingredient called dextromethorphan was causing this. Anytime I take anything with this, it happens. Idk if I’m sensitive to it or allergic."

2 / 10
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  • Lil...
  • Taken for less than 1 month
  • December 20, 2020

For Cough "I just took 10 ml Delsym for my chest and dry cough, adult strength. And 10-15 minutes after taking it, my heart started racing, and it scared me. I called the pharmacist about the heart pounding, and she stated that was a side effect. Here I am, feeling like I ran a mile and back, lying in my bed. I am not happy with this, even though I'm not coughing. I would caution anyone who takes this medication to be careful. I don't know how long it will be before it wears off, but I'm ready to feel relaxed again. Ugh, December 20, 2020"

5 / 10
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2 Report
  • Lil...
  • Taken for less than 1 month
  • December 20, 2020

For Cough "I just took 10 ml Delsym for my chest and dry cough, adult strength. And 10-15 minutes after taking it, my heart started racing, and it scared me. I called the pharmacist about the heart pounding, and she stated that was a side effect. Here I am, feeling like I ran a mile and back, lying in my bed. I am not happy with this, even though I'm not coughing. I would caution anyone who takes this medication to be careful. I don't know how long it will be before it wears off, but I'm ready to feel relaxed again. Ugh, December 20, 2020"

5 / 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.