Certuss (old Formulation) Side Effects
Generic name: carbetapentane / guaifenesin
Note: This document contains information about carbetapentane / guaifenesin systemic side effects in general and is therefore not limited to the specific dosage form(s) of Certuss (old Formulation).
Some side effects of Certuss (old Formulation) may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA
Applies to: oral capsule, oral liquid, oral suspension extended release, oral syrup, oral tablet extended release
Get emergency medical help if you have any of these signs of an allergic reaction while taking carbetapentane / guaifenesin: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medication and call your doctor at once if you have a serious side effect such as:
confusion, hallucinations, feeling restless or nervous;
Less serious side effects of carbetapentane / guaifenesin may include:
sleep problems (insomnia); or
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.