Overview
Codeine-Guaifenesin is a combination cough medicine in oral solution form that temporarily relieves cough due to minor throat and bronchial irritation from colds or inhaled irritants. It also helps loosen and thin mucus in the airways to make coughs more productive.
What is it used for?
This medicine is used in adults and children to:
- Temporarily relieve cough caused by minor throat and bronchial irritation as may occur with a cold or inhaled irritants
- Help reduce coughing to assist with sleep
- Loosen and thin mucus in the bronchial passages to clear phlegm and make coughs more productive
Active ingredients
Codeine phosphate 10 mg, Guaifenesin 100 mg per 5 mL
How it works
Codeine is an opioid that acts on the brain to suppress the cough reflex, reducing the urge to cough. Guaifenesin is an expectorant that helps loosen and thin bronchial mucus, making it easier to clear from the airways by coughing.
Dosage and administration
Adults and children 12 years and older: Take 2 teaspoons (10 mL) every 4 hours or as directed by a doctor. Do not exceed 6 doses in 24 hours.
Children 6 to under 12 years: Take 1 teaspoon (5 mL) every 4 hours or as directed by a doctor.
Children under 6 years: Consult a doctor before use.
Use a special measuring device for accurate dosing, especially in children under 6. Do not exceed the recommended dose to avoid serious side effects.
Warnings and precautions
- A persistent cough may indicate a serious condition and should be evaluated by a healthcare professional.
- Do not use for coughs associated with smoking, asthma, chronic bronchitis, emphysema, or chronic pulmonary disease without medical advice.
- Avoid using if the cough produces excessive mucus.
- Keep out of reach of children. Accidental overdose can be fatal; seek immediate medical help or contact Poison Control if overdose occurs.
- Use caution in children, especially when taking other medications.
- Use may cause or worsen constipation.
- Stop use and consult a doctor if symptoms persist beyond 7 days, worsen, or are accompanied by fever, rash, or persistent headache.
- If pregnant or breastfeeding, consult a healthcare professional before use.
Side effects
- Common side effects may include constipation.
- Serious side effects from higher than recommended doses, especially in children, include respiratory depression and other opioid-related adverse effects.
Drug interactions
Use with other drugs in children should be done cautiously and only under medical supervision to avoid additive side effects.
Pregnancy and breastfeeding
If pregnant or breastfeeding, ask a health professional before using this product.
Overdose information
In case of overdose, seek immediate medical help or contact a Poison Control Center. Overdose symptoms may include serious opioid toxicity.
Storage
Store at controlled room temperature between 15°-30°C (59°-86°F). Keep the bottle tightly closed and do not use if the tamper-evident foil seal under the cap is broken or missing.
Manufacturer(s)
Medical references
- U.S. National Library of Medicine – DailyMed
- Official prescribing information
- Other authoritative medical references, where applicable
References are used to support the medical information presented on this page.
Medical information disclaimer
The information on WikiDrug is provided for educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making decisions about medication use.
Last updated November 5, 2026