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What Causes Increased Heart Rate After Having NyQuil?

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Posted on Sat, 9 Jan 2016
Question: I took NyQuil and now my heart rate is up. What can I do to bring it down?
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Answered by Dr. Panagiotis Zografakis (26 minutes later)
Brief Answer:
just wait unless it's causing serious symptoms

Detailed Answer:
Hello,

some forms of NyQuil contain antihistamines and decongestants. Both of them may cause tachycardia as a side effect. In most cases this is a harmless and self-limited effect which will get better as the effect of those drugs wears off. If you don't have any serious symptoms like shortness of breath, hypotension, etc and no prior history of heart disease then you can just wait.

If you've taking too many of them (against dosage indications) then you should visit the local emergency room as soon as possible.

I hope you find my comments helpful!
You can contact me again, if you'd like any clarifications or further information.

Kind Regards!
Note: For further queries related to coronary artery disease and prevention, click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Panagiotis Zografakis

Internal Medicine Specialist

Practicing since :1999

Answered : 3810 Questions

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What Causes Increased Heart Rate After Having NyQuil?

Brief Answer: just wait unless it's causing serious symptoms Detailed Answer: Hello, some forms of NyQuil contain antihistamines and decongestants. Both of them may cause tachycardia as a side effect. In most cases this is a harmless and self-limited effect which will get better as the effect of those drugs wears off. If you don't have any serious symptoms like shortness of breath, hypotension, etc and no prior history of heart disease then you can just wait. If you've taking too many of them (against dosage indications) then you should visit the local emergency room as soon as possible. I hope you find my comments helpful! You can contact me again, if you'd like any clarifications or further information. Kind Regards!