This registry is a place to share positive or negative side effects of using Guaifen-C. If you directly experienced a side effect while using Guaifen-C, then we encourage you to enter it here. Please note that entries here are the experiences of individual users, and in no way means that you or anyone else will experience the same side effect, since the same medication affects people in different ways. Please always contact your physician.
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August 30th
2004
7:26 AM
I was up all night with my heart racing and I felt like horrible. And when I did doze off I would have the worst nightmares. It made my body hurt like I had the flu and the cotton mouth is horrible. I took one pill last night before bed and it is now 12:25pm next day and still feel like I have the flu. This didn't help with my sinus congestion either I had post nasal drip all night and still now. This is a horrible medicine!!
-- By priscilla | Reply | Private Message me