Description
What Is Lemsip Cough Chesty Syrup and What Is It Used For
Lemsip Cough Chesty Syrup is designed to provide symptomatic relief from deep, chesty coughs by loosening stubborn mucus and soothing throat irritation.
Formulated with the active ingredient guaifenesin, this expectorant helps thin and loosen mucus in the chest and lungs, making it easier to cough up and clear congestion naturally.
This syrup also helps calm irritation in the throat caused by persistent coughing, allowing you to breathe more easily and recover faster.
For NHS-approved advice on treating chesty coughs, visit the NHS website.
How Lemsip Cough Chesty Works
The key ingredient, guaifenesin (50mg per 5ml), works by:
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Breaking down mucus build-up in the airways
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Helping clear phlegm and congestion
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Easing chest tightness caused by excess mucus
Together, these effects help relieve coughing fits and promote clearer breathing.
Key Benefits
- Relieves deep, chesty coughs
- Loosens mucus for easier breathing
- Soothes throat irritation caused by coughing
- Helps clear congestion in the lungs and airways
- Pleasant-tasting syrup that’s easy to take
Before You Use Lemsip Cough Chesty
Do not use Lemsip Cough Chesty Syrup if:
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You are allergic to guaifenesin or any of the other ingredients
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You are under 12 years old
Speak to your GP or pharmacist before use if:
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You are pregnant or breastfeeding
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You have persistent symptoms lasting more than 3 weeks
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You suffer from asthma, chronic cough, or excessive mucus production
Always read the Patient Information Leaflet (PIL) before use for complete safety and dosage guidance.
How To Use Lemsip Cough Chesty Syrup
For oral use only.
Recommended Dose:
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Adults and children aged 12 years and over:
Take 10–20ml (2-4 x 5ml spoonfuls) three to four times daily. -
Rinse the measuring cup thoroughly after use.
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Do not exceed the stated dose.
If your symptoms do not improve after 7 days or worsen, consult your doctor or pharmacist.
Home Care Tips for Chesty Coughs
While using Lemsip Cough Chesty Syrup, you can also support recovery by:
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Getting plenty of rest
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Drinking lots of fluids to help loosen mucus
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Avoiding smoke or dusty environments
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Using a humidifier to keep airways moist
Seek medical advice if you experience:
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Chest pain or difficulty breathing
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Cough lasting longer than 3 weeks
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High fever, unexplained weight loss, or swollen glands
Lemsip Chesty Cough Ingredients
Active ingredient (per 5ml):
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Guaifenesin 50mg
Other ingredients:
Sucrose (4g per 5ml), sodium (3.66mg), glycerol, and other excipients for taste and stability.
Allergen advice:
Contains sugar. If you have been told by your doctor that you are intolerant to certain sugars, speak to a healthcare professional before taking this medicine.
Possible Side Effects
Like all medicines, Lemsip Cough Chesty Syrup may cause side effects, although not everyone will experience them.
Stop taking this medicine and seek medical help immediately if you experience:
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Difficulty breathing or swelling of the face, lips, or throat
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Skin rash or itching (signs of an allergic reaction)
Other possible side effects (rare):
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Mild nausea or stomach discomfort
If you notice any unusual symptoms, consult your doctor or pharmacist. You can report side effects through the MHRA Yellow Card Scheme.
Frequently Asked Questions
Can I take Lemsip Cough Chesty with other cough medicines?
Avoid taking multiple cough medicines that contain guaifenesin or similar expectorants at the same time.
Can I drive after taking this medicine?
Yes – this medicine does not cause drowsiness.
Can I take it if I’m diabetic?
This syrup contains sugar. Ask your doctor or pharmacist for a sugar-free alternative.

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