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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Rapid Heart Rate And Weakness After Taking 'niquil'?

I have been coughing alot, headache, sore throat etc. all that is gone except the coughing which won't ket me sleep. I am on i mg of xanax, is it safe to take niquil? I took it at 1:00 this morining and feel horrible, weak, rapid heart rate, hust zined out. Any explanatons for this would be greatly apptrciated.
posted on Fri, 14 Mar 2014
Twitter Mon, 8 Jun 2015 Answered on
Twitter Tue, 9 Jun 2015 Last reviewed on
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Cardiologist,  's  Response
Hello!

Thank you for asking on HCM!

Regarding your concern, i would like t oexplain you that there exist some interaction between Xanax and components of Nyquil as follow:

(1) Xanax and Doxylamine (a Nyquil's component) have a potential for interaction and should be closely monitored. When used concomitantly they may increase even more sedation.

(2) Xanax and Pseudoephedrine (a Nyquiil's cmponent) have a potential for interaction; Xanax increases and Pseudoephedrine decreases sedation. A close monitoring and a cautious use should be considered.

My opinion is to stop Xanax temporarily, when taking Nyquil (if it is necessary to use), to avoid probable interactions and side effects.

Hope to have bee nhelpful to you! Greetings! Dr. Iliri
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What Causes Rapid Heart Rate And Weakness After Taking 'niquil'?

Hello! Thank you for asking on HCM! Regarding your concern, i would like t oexplain you that there exist some interaction between Xanax and components of Nyquil as follow: (1) Xanax and Doxylamine (a Nyquil s component) have a potential for interaction and should be closely monitored. When used concomitantly they may increase even more sedation. (2) Xanax and Pseudoephedrine (a Nyquiil s cmponent) have a potential for interaction; Xanax increases and Pseudoephedrine decreases sedation. A close monitoring and a cautious use should be considered. My opinion is to stop Xanax temporarily, when taking Nyquil (if it is necessary to use), to avoid probable interactions and side effects. Hope to have bee nhelpful to you! Greetings! Dr. Iliri