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A member asked:
Does mucinex (guaifenesin) make you drowsy?
A doctor has provided 1 answer
No ( if used alone): Mucinex (guaifenesin) alone is not associated with drowsiness. Common side effects may include headache, dizziness, nausea/vomiting. Be careful when using combination products which may contain antihistamines as these may cause drowsiness. Take with a full glass of water. Do not use for > 7 days.If problem persists /worsen see a doctor. Hope you feel better soon.
Answered 12/1/2018
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