Benylin Chesty Coughs Syrup – 300ml

Description

Benylin Chesty Coughs Syrup – 300ml

Benylin Chesty Coughs Syrup is a non-drowsy liquid medicine designed to relieve chesty coughs in adults and children aged 12 and over. It helps to loosen and clear the thick mucus (phlegm) that builds up in the chest and causes that persistent, productive cough.

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How It Works

The active ingredient guaifenesin is an expectorant — it works by thinning and loosening the mucus in your airways, making it easier to cough up and clear your chest. Levomenthol adds a soothing, cooling sensation that helps to ease irritation in the throat and airways, making each breath feel more comfortable.

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Directions for Use

Adults and children aged 12 and over: take 10 ml (two 5 ml spoonfuls) up to four times a day. Leave at least four hours between doses. Do not exceed four doses in 24 hours. This medicine is not recommended for children under 12 years of age. Always read the patient information leaflet before use. If you are unsure about the correct dose, speak to your PillSorted pharmacist.

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Active Ingredients

• Guaifenesin 100 mg per 5 ml
• Levomenthol 1.1 mg per 5 ml

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Possible Side Effects

• Nausea or an upset stomach
• Vomiting
• Diarrhoea
• Dizziness
• Headache
• Allergic skin reactions such as rash or itching
If you experience any serious side effects, stop taking this medicine and seek medical advice immediately.

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Who Should Not Take This Medicine

• Children under 12 years of age
• Anyone who is allergic to guaifenesin, levomenthol, or any other ingredient in this product
• People with a persistent or chronic cough such as that associated with asthma, chronic bronchitis, or emphysema, unless directed by a doctor
• People with a cough that produces excessive mucus, unless advised by a doctor

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Interactions

Benylin Chesty Coughs Syrup is not known to interact significantly with most medicines; however, guaifenesin may theoretically affect certain laboratory tests for urinary 5-hydroxyindoleacetic acid and vanillylmandelic acid — inform your doctor if you are due to have such tests. Tell your PillSorted pharmacist or doctor about all medicines you are currently taking, including herbal remedies and supplements.

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Pregnancy and Breastfeeding

The safety of guaifenesin and levomenthol during pregnancy and breastfeeding has not been fully established. This medicine is not recommended during pregnancy or whilst breastfeeding unless clearly indicated by a healthcare professional. Speak to your doctor or PillSorted pharmacist before use if you are pregnant, trying to conceive, or breastfeeding.

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Alcohol

There is no specific interaction between Benylin Chesty Coughs Syrup and alcohol; however, drinking alcohol whilst you are unwell is generally not advised as it can worsen symptoms such as dehydration and disrupt your recovery. If you have any concerns, speak to your PillSorted pharmacist.

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Driving and Operating Machinery

Benylin Chesty Coughs Syrup is formulated to be non-drowsy and is not expected to affect your ability to drive or operate machinery. However, if you feel dizzy or experience any unexpected side effects, do not drive or use machinery until you feel well again.

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Storage

Store below 25°C in a dry place, away from direct sunlight and heat. Do not refrigerate or freeze. Keep out of sight and reach of children. Do not use after the expiry date shown on the packaging.

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Important Information

• This product is a medicine. Speak to your doctor or PillSorted pharmacist before taking this product if you have an underlying medical condition or are taking any other medication or complementary therapy.
• If symptoms worsen or persist, contact your doctor.
• If pregnant, trying to conceive or breastfeeding, seek medical advice before use.
• If you suffer from allergies, confirm suitability with your PillSorted pharmacist before use.
• Store out of sight and reach of children.
• Read the enclosed patient information leaflet carefully before use.
• Contact your GP where appropriate.

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Patient Information Leaflet

For the full Patient Information Leaflet (PIL) for this medicine, visit the electronic Medicines Compendium (EMC). For further information about this medicine, visit NHS.uk.

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This content has been medically reviewed and approved by Zeinab Ardeshir (GPhC 2075730), Superintendent Pharmacist at PillSorted (GPhC-registered online pharmacy 9011258). Last reviewed: February 2026.

Brand	BENYLIN