Chlorpheniramine/Guaifenesin Side Effects

Please note - some side effects for Chlorpheniramine/Guaifenesin 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 Chlorpheniramine/Guaifenesin - for the Consumer

Chlorpheniramine/Guaifenesin

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 Chlorpheniramine/Guaifenesin:

Constipation; diarrhea; dizziness; drowsiness; dry mouth, nose, or throat; headache; loss of appetite; nausea; upset stomach; vomiting; weakness.

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); blurred vision or other vision changes; changes in thinking or behavior; confusion; difficult or painful urination; excitability; fainting; fast, slow, or irregular heartbeat; fever, chills, or persistent sore throat; flushing; hallucinations; inability to urinate; loss of coordination; mood or mental changes; nervousness or anxiety; ringing in the ears or other hearing changes; seizures; severe drowsiness; severe dry mouth, nose, or throat; severe or persistent dizziness, lightheadedness, or headache; shortness of breath; slow or irregular breathing; tremor; trouble sleeping; unusual bruising or bleeding; unusual tiredness or weakness.

Chlorpheniramine/Guaifenesin/Pseudoephedrine

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 Chlorpheniramine/Guaifenesin/Pseudoephedrine:

Constipation; diarrhea; dizziness; drowsiness; excitability; headache; loss of appetite; nausea; nervousness or anxiety; trouble sleeping; upset stomach; vomiting; weakness.

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating or inability to urinate; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor; trouble sleeping; vision changes.

Chlorpheniramine/Guaifenesin/Phenylephrine Drops

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 Chlorpheniramine/Guaifenesin/Phenylephrine Drops:

Constipation; diarrhea; dizziness; drowsiness; excitability; headache; loss of appetite; nausea; nervousness or anxiety; trouble sleeping; upset stomach; vomiting; weakness.

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating or inability to urinate; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor; trouble sleeping; vision changes.

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