guaifenesin + pseudoephedrine hydrochloride at a glance
Medicine class
Expectorant plus sympathomimetic decongestant.
Type of cough
For a productive cough with nasal or sinus congestion—not a dry cough alone.
Age restriction
The selected product is contraindicated in children under 12 years.
Avoid duplication
Do not combine with another cough-and-cold medicine or sympathomimetic decongestant.
What is guaifenesin + pseudoephedrine hydrochloride used for?
The selected product provides symptomatic relief when an upper respiratory illness causes both congestion and a productive cough.
Loosening mucus associated with a productive or chesty cough.
Relieving accompanying nasal and sinus congestion.
How does guaifenesin + pseudoephedrine hydrochloride work?
Guaifenesin increases respiratory-tract fluid and makes bronchial secretions less viscous, helping clear mucus. Pseudoephedrine constricts swollen blood vessels in the nasal and sinus lining, reducing congestion.
How to take guaifenesin + pseudoephedrine hydrochloride
The selected formulation is an oral syrup. Measure it with the supplied spoon and follow the pack directions. Do not overfill the measure or exceed the label instructions.
Do not give it to a child under 12 years.
Do not take it with another cough-and-cold product or decongestant.
Seek advice if symptoms persist, worsen or keep returning.
guaifenesin + pseudoephedrine hydrochloride side effects
Common or expected effects
- Headache
- Difficulty sleeping
- Nervousness
- Dizziness
- Dry mouth
- Nausea
Get urgent medical advice
- Sudden severe headache, confusion, seizures, vomiting or visual changes—possible PRES or RCVS
- Severe allergic reaction, including facial or throat swelling or difficulty breathing
- Chest pain, heart attack symptoms, stroke symptoms or a fast or irregular heartbeat
- Sudden loss of vision
- Severe blistering, peeling or pustular rash
- Sudden abdominal pain or rectal bleeding
- Inability or marked difficulty passing urine
guaifenesin + pseudoephedrine hydrochloride in pregnancy
Pseudoephedrine is not recommended during pregnancy because it may reduce placental blood flow. Evidence suggesting a possible first-trimester birth-defect risk is limited. Use should only be considered after a doctor or pharmacist assesses the benefits and risks.
guaifenesin + pseudoephedrine hydrochloride while breastfeeding
Oral pseudoephedrine is not usually recommended while breastfeeding. Small amounts enter breast milk, effects on the infant are uncertain, and it may reduce milk production. Ask a doctor or pharmacist about alternatives.
guaifenesin + pseudoephedrine hydrochloride interactions
Check all prescribed, pharmacy and non-prescription products before use, especially combination cold remedies.
Monoamine oxidase inhibitors and reversible MAO inhibitors, including moclobemide
Concurrent or recent use can cause a dangerous rise in blood pressure or hypertensive crisis.
Other sympathomimetics
Decongestants, stimulants and appetite suppressants can add to cardiovascular and nervous-system effects.
Tricyclic antidepressants
The combination may raise blood pressure and increase anticholinergic effects.
Common questions about guaifenesin + pseudoephedrine hydrochloride
Answers are fully visible for fast scanning and source review.
What is guaifenesin + pseudoephedrine hydrochloride used for?
It relieves a productive cough and accompanying nasal or sinus congestion caused by an upper respiratory illness.
Is it suitable for a dry cough?
The selected product is intended for a mucus-producing cough with congestion, not a dry cough alone.
Can children take it?
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.