Skip to main content

Guaifenesin / potassium guaiacolsulfonate Side Effects

Applies to guaifenesin/potassium guaiacolsulfonate: oral tablet extended release.


Gastrointestinal side effects have included nausea, vomiting, and stomach discomfort.[Ref]

Nervous system

Nervous system side effects have included dizziness and headache.[Ref]


Dermatologic side effects have included skin rash and urticaria.[Ref]


1. Product Information. Humibid L.A. (guaifenesin-potassium guaiacolsulfonate). Carolina Pharmaceuticals Inc. 2004.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.