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Lemsip Cough For Mucus Cough & Cattarh - 180ml

Lemsip Cough For Mucus Cough & Cattarh - 180ml

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  • ✔️ Loosens and thins mucus to relieve chesty coughs effectively
  • ✔️ Contains guaifenesin 100mg/5ml, a clinically established expectorant
  • ✔️ Relieves catarrh and mucus build-up in chest and airways
  • ✔️ Suitable for adults and young people aged 12 and over
  • ✔️ 180ml bottle provides multiple doses for sustained symptom relief

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What Is Lemsip Cough For Mucus and How Does It Help?

 

If you've been dealing with a chesty cough that just won't shift, you'll know how exhausting it can be. Lemsip cough for mucus is an over-the-counter expectorant syrup designed specifically to tackle productive coughs — the kind where mucus builds up in your chest and airways, making every cough feel like hard work. Available in a 180ml bottle, it's a practical, easy-to-use option for adults and young people aged 12 and over. You can browse our full range of cold and flu remedies if you're also dealing with other symptoms alongside your cough.

Catarrh — that persistent build-up of mucus in the nose, throat, or airways — is one of the most common complaints during cold and flu season. It can linger long after other symptoms have cleared, leaving you with a rattling cough and a blocked feeling in your chest. Lemsip Cough For Mucus Cough & Catarrh is formulated to address exactly this, helping to loosen and thin the mucus so your body can clear it more effectively.

 

How Does Lemsip Cough For Mucus Work in the Body?

 

The active ingredient in this syrup is guaifenesin, at a concentration of 100mg per 5ml. Guaifenesin is a well-established expectorant — a class of medicine that works on the mucus itself rather than suppressing the cough reflex. Here's how it works step by step:

  • Guaifenesin is absorbed from the gut into the bloodstream after you take a dose.
  • It acts on the glands lining the respiratory tract, stimulating them to produce a thinner, more watery mucus secretion.
  • This thinner mucus is easier for the tiny hair-like cilia in your airways to move upward.
  • Your cough then becomes more productive — meaning you can clear the mucus more efficiently with less effort.

It's worth noting that guaifenesin does not suppress the cough reflex. This is intentional. For a chesty, mucus-producing cough, suppressing the cough would be counterproductive — you need to be able to clear that mucus out.

 

Who Should Use Lemsip Cough For Mucus Cough & Catarrh?

 

This syrup is suitable for a specific type of cough. It's not a one-size-fits-all remedy, so it's worth making sure it matches your symptoms before you buy. It's designed for people who have:

  • A chesty, productive cough with visible or felt mucus
  • Catarrh — excess mucus in the nose, throat, or chest
  • Cough symptoms associated with a cold or upper respiratory tract infection
  • Symptoms in adults or young people aged 12 years and over

It is not appropriate for dry, tickly, or irritating coughs where no mucus is being produced. If you're unsure which type of cough you have, your pharmacist can help you choose the right product.

 

How Does Lemsip Cough For Mucus Compare to Other Cough Syrups?

 

Feature Lemsip Cough For Mucus 180ml Dry Cough Suppressant Syrup
Active ingredient Guaifenesin 100mg/5ml Dextromethorphan or pholcodine
Cough type Chesty, productive (mucus) cough Dry, tickly, non-productive cough
Mechanism Expectorant — thins and loosens mucus Suppressant — reduces cough reflex
Suitable age 12 years and over Varies by product

 

Is Lemsip Cough For Mucus Safe to Store at Home?

 

Yes — lemsip cough for mucus is straightforward to store. Keep it below 25°C, away from direct sunlight, and out of reach of children. Do not refrigerate the syrup, as this can affect the consistency. Once opened, check the label for any in-use expiry guidance. If you're managing multiple cold and flu symptoms at once, it may also be worth exploring our ear, nose and throat remedies for additional support with catarrh and congestion.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Lemsip Cough For Mucus Cough & Catarrh 180ml specifications
Treatment category Cough & Cold Remedies
Mechanism of action Expectorant — thins and loosens airway mucus
Effective for Chesty cough, mucus cough, catarrh
Suitable for Adults and children aged 12 years and over
Active ingredient Guaifenesin 100mg per 5ml
Pack size 180ml
UK classification General Sale List (GSL)
Drug class Expectorant
Preparation Oral syrup / liquid
Route of administration Oral

Specifications of Lemsip Cough For Mucus Cough & Catarrh 180ml

 

What Is Lemsip Cough For Mucus Cough & Catarrh and What Is It Used For?

 

Lemsip Cough For Mucus Cough & Catarrh 180ml is an oral expectorant syrup used to relieve chesty coughs and catarrh in adults and young people aged 12 and over. Its active ingredient, guaifenesin (100mg per 5ml), works by thinning the mucus in your airways, making it easier to cough up and clear. It is an over-the-counter medicine available without a prescription. The NHS notes that most coughs caused by colds and upper respiratory infections will improve within three weeks, but symptomatic relief can make that time considerably more comfortable.

 

What Do You Need to Know Before Using Lemsip Cough For Mucus?

 

Before taking this syrup, read the following carefully. There are situations where this product may not be suitable for you.

Do not use this product if you:

  • Are under 12 years of age
  • Are allergic to guaifenesin or any other ingredient in the syrup
  • Have a persistent or chronic cough associated with asthma, chronic bronchitis, or emphysema
  • Have a cough that produces excessive mucus

Speak to your pharmacist or GP before use if you:

  • Are pregnant or breastfeeding
  • Have kidney or liver problems
  • Are taking any other medicines, including herbal remedies
  • Have a high temperature (fever) above 38°C that has lasted more than three days

Known drug interactions:

  • No clinically significant interactions are established at standard OTC doses of guaifenesin
  • Always inform your pharmacist of all medicines you are currently taking
  • Avoid combining with other cough and cold products that may contain similar ingredients

 

How Should You Use Lemsip Cough For Mucus Cough & Catarrh?

 

Always use this medicine exactly as described on the label or as directed by your pharmacist. Using a proper 5ml measuring spoon or oral syringe is important — a kitchen teaspoon is not accurate enough. Staying well hydrated while taking an expectorant can also help the mucus thin more effectively, so drink plenty of water throughout the day.

  1. Shake the bottle gently before each use.
  2. Measure the correct dose using a 5ml measuring spoon or oral syringe.
  3. Swallow the syrup directly — do not dilute it.
  4. Take with a full glass of water to help loosen mucus further.
  5. Repeat up to four times daily, leaving at least four hours between doses.
  6. Do not exceed four doses in any 24-hour period.
Indication Age Group Dose Frequency
Chesty cough / catarrh Adults & children 12+ 10ml (two 5ml spoonfuls) Up to 4 times daily
Chesty cough / catarrh Under 12 years Not suitable

 

What Are the Possible Side Effects of Lemsip Cough For Mucus?

 

Guaifenesin is generally well tolerated at recommended doses. Side effects are uncommon, but it's important to know what to look out for. If you experience anything severe or unexpected, stop taking the syrup and speak to your pharmacist or GP. You can also find additional support through our pain relief range if you're managing associated symptoms like a sore throat or headache.

Common side effects:

  • Nausea or stomach discomfort
  • Vomiting (particularly if taken on an empty stomach)
  • Headache

Less common side effects:

  • Dizziness
  • Drowsiness
  • Skin rash or itching (possible allergic reaction — stop use immediately)

If you notice any signs of a serious allergic reaction — such as swelling of the face, lips, or throat, difficulty breathing, or a severe rash — seek emergency medical attention immediately.

 

How Should You Store Lemsip Cough For Mucus Cough & Catarrh?

 

Correct storage helps maintain the quality and safety of the syrup throughout its shelf life. Follow these instructions carefully:

  • Store below 25°C in a cool, dry place
  • Do not refrigerate or freeze
  • Keep the bottle tightly closed when not in use
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the label
  • Do not dispose of medicines via wastewater or household waste — return unused medicine to your pharmacist

If you're supporting your recovery from a cold or flu more broadly, it's worth exploring vitamins and supplements such as vitamin C and zinc, which may help support your immune system during illness.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Lemsip Cough For Mucus online in the UK?

You can buy Lemsip Cough For Mucus Cough & Catarrh 180ml directly from Cured Pharmacy for £7.89 — no prescription needed. It's a General Sale List medicine, so it's available over the counter. Simply add it to your basket and it will be dispatched to your door.

How does Lemsip Cough For Mucus work in the body?

The active ingredient, guaifenesin, is an expectorant that stimulates the glands lining your airways to produce thinner, more watery mucus. This makes it easier for your body's natural cilia to move the mucus upward and out of your airways. The result is a more productive cough that clears your chest more efficiently.

How do I use Lemsip Cough For Mucus step by step?

Shake the bottle, then measure 10ml using a proper measuring spoon or oral syringe. Swallow the dose directly and follow it with a full glass of water. Repeat up to four times daily, leaving at least four hours between each dose.

What is the correct dose of Lemsip Cough For Mucus for adults?

Adults and young people aged 12 and over should take 10ml (two 5ml spoonfuls) up to four times a day. Do not take more than four doses in any 24-hour period. Always use an accurate measuring device rather than a kitchen spoon.

When is the best time to take Lemsip Cough For Mucus?

There is no single "best" time — you can space your doses evenly throughout the day, roughly every four to six hours. Many people find it helpful to take a dose before bed to ease overnight coughing. Taking it with a full glass of water at any time of day helps the expectorant work more effectively.

Can children take Lemsip Cough For Mucus?

No — this product is not suitable for children under 12 years of age. If your child has a chesty cough, speak to your pharmacist about age-appropriate alternatives. You can also browse our baby and toddler range for products designed for younger children.

What are the side effects of Lemsip Cough For Mucus?

Side effects are uncommon but can include nausea, stomach discomfort, headache, or dizziness. Rarely, some people may experience a skin rash, which could indicate an allergic reaction — stop use immediately if this occurs. If you experience any severe or unexpected symptoms, contact your pharmacist or GP.

How do I manage side effects of Lemsip Cough For Mucus?

Taking the syrup with food or a full glass of water can help reduce the chance of nausea or stomach upset. If you feel dizzy, sit or lie down until the feeling passes and avoid driving. For any persistent or concerning side effects, stop taking the product and seek advice from your pharmacist.

Who is eligible to use Lemsip Cough For Mucus?

This syrup is suitable for adults and young people aged 12 and over who have a chesty, productive cough or catarrh. It is not suitable for those with chronic respiratory conditions such as asthma or COPD without first consulting a doctor. People who are pregnant, breastfeeding, or taking other medicines should speak to a pharmacist before use.

What happens if I miss a dose of Lemsip Cough For Mucus?

If you miss a dose, simply take the next one when it's due — do not double up to make up for a missed dose. This is an as-needed medicine rather than a strict scheduled treatment, so missing one dose is unlikely to affect your recovery. Just ensure you leave at least four hours between doses.

How long can you use Lemsip Cough For Mucus for?

You should not use this product for more than seven days without seeking medical advice. If your cough persists beyond a week, worsens, or is accompanied by a high fever or blood in the mucus, see your GP. Most coughs from colds resolve within two to three weeks according to NHS guidance.

Can I take Lemsip Cough For Mucus if I am pregnant or breastfeeding?

If you are pregnant or breastfeeding, you should consult your doctor or pharmacist before using this product. Guaifenesin is generally avoided during the first trimester of pregnancy as a precaution. Your healthcare provider can advise on the safest option for your situation.

What are the alternatives to Lemsip Cough For Mucus?

Other expectorant syrups containing guaifenesin are available, such as Benylin Chesty Coughs or own-brand guaifenesin syrups. For broader cold and flu symptom relief, you can explore our full cold and flu collection. Always check that any alternative is appropriate for your specific cough type before switching.

Is Lemsip Cough For Mucus suitable for a dry cough?

No — lemsip cough for mucus is specifically formulated for chesty, productive coughs where mucus is present. Using an expectorant for a dry, tickly cough is unlikely to help and may not be appropriate. For a dry cough, speak to your pharmacist about a suitable cough suppressant instead.

What are the latest findings on guaifenesin for cough relief?

Guaifenesin has been used as an expectorant for decades and remains one of the most widely used OTC cough ingredients in the UK and internationally. Current evidence supports its use for symptomatic relief of productive coughs, though the NHS notes that most coughs will resolve on their own with time and rest. It is considered safe and well tolerated at recommended doses for short-term use.

How Should You Use Lemsip Cough For Mucus Cough & Catarrh?

Always read the label before use and follow the instructions carefully. Using the correct measuring device is essential — a standard kitchen teaspoon is not accurate enough and could lead to under- or over-dosing. Drinking plenty of water throughout the day while taking this syrup can help the guaifenesin work more effectively by keeping your airways hydrated and mucus thinner.

Follow these steps each time you take a dose:

What Is the Correct Dose of Lemsip Cough For Mucus?

The dose is the same for all eligible users — adults and young people aged 12 and over. There is no adjusted dose for older adults, but if you have kidney or liver problems, speak to your pharmacist before use. Never exceed the maximum daily dose, even if your symptoms feel severe.

When Is the Best Time to Use Lemsip Cough For Mucus?

There is no single prescribed time of day — you can take your doses at evenly spaced intervals throughout the day to maintain consistent symptom relief. Many people find it particularly useful to take a dose in the evening before bed, as coughing can worsen when lying down and disrupt sleep. Taking a dose first thing in the morning can also help loosen overnight mucus build-up and make your chest feel clearer earlier in the day.

If you are taking other cold or flu remedies at the same time, always check with your pharmacist to ensure there is no overlap in ingredients. Avoid taking this syrup alongside other products that also contain guaifenesin.

How Long Can You Use Lemsip Cough For Mucus For?

This syrup is intended for short-term use only. Do not use it for more than seven consecutive days without seeking medical advice. If your cough has not improved after a week, or if it worsens at any point, you should consult your GP — a persistent cough can sometimes indicate an underlying condition that needs further investigation.

You should also seek medical attention sooner if your cough is accompanied by a high fever, chest pain, shortness of breath, or if you notice blood in the mucus you cough up. These symptoms may require a different type of treatment entirely.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

How Should You Use Lemsip Cough For Mucus Cough & Catarrh?

Always read the label before use and follow the instructions carefully. Using the correct measuring device is essential — a standard kitchen teaspoon is not accurate enough and could lead to under- or over-dosing. Drinking plenty of water throughout the day while taking this syrup can help the guaifenesin work more effectively by keeping your airways hydrated and mucus thinner.

Follow these steps each time you take a dose:

What Is the Correct Dose of Lemsip Cough For Mucus?

The dose is the same for all eligible users — adults and young people aged 12 and over. There is no adjusted dose for older adults, but if you have kidney or liver problems, speak to your pharmacist before use. Never exceed the maximum daily dose, even if your symptoms feel severe.

When Is the Best Time to Use Lemsip Cough For Mucus?

There is no single prescribed time of day — you can take your doses at evenly spaced intervals throughout the day to maintain consistent symptom relief. Many people find it particularly useful to take a dose in the evening before bed, as coughing can worsen when lying down and disrupt sleep. Taking a dose first thing in the morning can also help loosen overnight mucus build-up and make your chest feel clearer earlier in the day.

If you are taking other cold or flu remedies at the same time, always check with your pharmacist to ensure there is no overlap in ingredients. Avoid taking this syrup alongside other products that also contain guaifenesin.

How Long Can You Use Lemsip Cough For Mucus For?

This syrup is intended for short-term use only. Do not use it for more than seven consecutive days without seeking medical advice. If your cough has not improved after a week, or if it worsens at any point, you should consult your GP — a persistent cough can sometimes indicate an underlying condition that needs further investigation.

You should also seek medical attention sooner if your cough is accompanied by a high fever, chest pain, shortness of breath, or if you notice blood in the mucus you cough up. These symptoms may require a different type of treatment entirely.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of Lemsip Cough For Mucus?

Guaifenesin is generally well tolerated when taken at the recommended dose, and most people use this syrup without experiencing any problems. That said, like all medicines, it can cause side effects in some people. The most commonly reported ones tend to be mild and short-lived.

  • Nausea or feeling sick, particularly if taken on an empty stomach
  • Vomiting
  • Stomach discomfort or upset
  • Headache

Taking the syrup with food or a large glass of water can help reduce the likelihood of stomach-related side effects. If nausea persists, speak to your pharmacist.

What Are the Less Common Side Effects of Lemsip Cough For Mucus?

Less frequently, some people may notice other effects that are worth being aware of. These are not common, but they can occur.

  • Dizziness or light-headedness
  • Drowsiness
  • Skin rash or itching
  • Urticaria (hives)

If you develop a skin rash or itching after taking this syrup, this could indicate a mild allergic reaction. Stop taking the product and speak to your pharmacist as soon as possible.

What Are the Serious Side Effects of Lemsip Cough For Mucus?

Serious side effects from guaifenesin at OTC doses are rare. However, you should be aware of the signs of a serious allergic reaction (anaphylaxis), which — though very uncommon — can occur with any medicine. Seek emergency medical help immediately if you experience any of the following:

  • Swelling of the face, lips, tongue, or throat
  • Difficulty breathing or swallowing
  • Sudden drop in blood pressure or feeling faint
  • Severe skin reaction covering a large area of the body

Call 999 or go to your nearest A&E department without delay if you suspect anaphylaxis.

What Should You Do If You Experience Side Effects of Lemsip Cough For Mucus?

For mild side effects such as nausea or headache, try taking the syrup with food and plenty of water. If side effects are persistent or troublesome, stop using the product and consult your pharmacist or GP. You can also report suspected side effects directly to the MHRA through the Yellow Card scheme at yellowcard.mhra.gov.uk — this helps improve medicine safety for everyone.

Do not continue using this product if you feel it is making you unwell. Your pharmacist can help you find an alternative that suits you better.

Can Lemsip Cough For Mucus Interact With Other Medicines?

No clinically significant drug interactions have been established for guaifenesin at standard over-the-counter doses. However, you should always tell your pharmacist about every medicine you are currently taking — including prescription medicines, other OTC products, and herbal remedies. Avoid taking this syrup alongside other cough and cold products that may contain guaifenesin to prevent accidental double-dosing. If you are taking medicines for a chronic condition such as epilepsy, heart disease, or depression, seek pharmacist advice before use.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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