Guaifenex DM Side Effects

Please note - some side effects for Guaifenex DM may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).

Side Effects of Guaifenex DM - for the Consumer

Guaifenex DM Extended-Release Tablets

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Guaifenex DM Extended-Release Tablets:

Dizziness; drowsiness; stomach upset.

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue).

Side Effects by Body System

Nervous system

Nervous system side effects of dextromethorphan have included drowsiness and dizziness. Adverse effects, which have occurred at higher doses, include excitation, mental confusion, and opiate-like respiratory depression. In some cases of abuse, patients have experienced euphoria, hyperactivity, mania, and auditory and visual hallucinations.

Gastrointestinal

Gastrointestinal side effects have included nausea, vomiting and constipation.

Dermatologic

Dermatologic side effects have included pruritus and rash.

Hypersensitivity

Hypersensitivity side effects of dextromethorphan have included fixed-drug eruptions.

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