A member asked:

Does mucinex (guaifenesin) cause drowsiness?

3 doctors weighed in across 2 answers

No: It more frequently causes stimulation--it is not an antihistamine.

Answered 8/22/2017

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Dr. Lynne Weixel answered

Specializes in Clinical Psychology

Yes, esp w/ Zoloft!: Combining these medications can increase the risk of a rare but serious condition called the serotonin syndrome - definitely check with your doctor! it can be a bad interaction - take it seriously. Good luck - i hope it's nothing and you feel better soon, but do check it out.

Answered 6/28/2015

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Can Mucinex (guaifenesin) dm causes itching and rash?

A doctor has provided 1 answer