Cough Syrup – Complete UK Guide for Adults, Kids and Babies

A persistent cough is one of the most common reasons people visit a pharmacy in the UK. With shelves full of brightly coloured bottles promising relief, choosing the right one can feel overwhelming. The best approach depends on a few key factors: your age, the type of cough you have, and the active ingredient in the medicine.

UK guidance in 2025 continues to stress that cough medicines are not a one-size-fits-all solution. For adults, the choice is wide, but for children and babies, the options are far more limited and come with important safety warnings. Understanding the difference between a chesty cough and a dry, tickly one is the first step toward effective relief.

What Cough Syrup is Best for Adults?

For adults in the UK, the most suitable cough syrup is determined by the nature of the cough. For a chesty cough, where phlegm needs to be loosened, an expectorant like guaifenesin is typically recommended. For a dry, tickly cough, a soothing syrup or a suppressant is often more appropriate. Major retailers like Boots, Tesco, and Superdrug stock a wide range of options to suit these needs.

• Most cough syrups for adults contain guaifenesin (expectorant) or dextromethorphan (suppressant); choose based on symptom type. (Source: NHS)
• Cough syrups for children under 6 are not recommended without a doctor’s advice; never give to babies under 1 without professional guidance. (Source: NHS)
• Codeine cough syrup is no longer available over-the-counter in the UK since 2021 due to safety risks. (Source: MHRA)
• Covonia Chesty Cough Syrup contains guaifenesin and is sugar-free, suitable for adults and children over 12. (Source: Covonia product page)
• For a dry/tickly cough, glycerol, honey, or dextromethorphan-based products are the primary options.
• Always check the label for age suitability, as “non-drowsy” does not automatically mean it is safe for children.

Which Cough Syrup is Safe for Children and Babies?

Safety for Children Under 12

UK health authorities advise that many over-the-counter cough and cold medicines, including those containing guaifenesin and dextromethorphan, should not be given to children under the age of 6 unless a doctor or pharmacist specifically recommends them. For children aged 6 to 12, these products may be used with caution, but simpler syrups based on glycerol or honey are often the safer first choice.

What About Babies Under 1 Year?

For babies, the safest approach is usually medical advice rather than self-treating with cough syrup. Honey is not safe for infants under 1 year because of the risk of infant botulism. Products like Benylin infant’s cough syrup, which lists glycerol as the active ingredient, is noted in some pharmacy reviews for children aged 3 months to 5 years, but professional guidance is always recommended for this age group.

What Cough Syrup is Best for a Chesty Cough?

A chesty cough, where mucus is present in the airways, is best treated with an expectorant. The primary active ingredient to look for is guaifenesin. It works by thinning the mucus, making it easier to cough up and clear the lungs. Popular UK products containing guaifenesin include Benylin Chesty Coughs Non-Drowsy, which is intended for adults and children aged 12 years and over.

Other brands like Covonia also offer chesty cough formulations. It is vital to avoid using these products for young children unless the specific product’s age guidance allows it and a healthcare professional has been consulted. The NHS provides a detailed leaflet on guaifenesin for those seeking more information.

What is Covonia Cough Syrup and How is it Used?

Covonia is a well-known brand in the UK that produces a range of cough syrups for different symptoms. The Covonia Dry and Tickly Cough Linctus, for example, is designed for adults and children over 1 year. Its formulation includes honey, capsicum tincture, menthol, peppermint oil, and anise oil, which work to soothe the throat and calm the cough reflex.

Other Covonia products focus on chesty coughs and often contain guaifenesin. The brand is widely available across major UK pharmacies and supermarkets.

Where Can I Buy Cough Syrup in the UK? (Boots, Tesco, and More)

Cough syrups are widely accessible across the UK. Major high-street chains such as Boots, Tesco, and Superdrug all carry standard formulations in their pharmacies and medicine aisles. These retailers typically organise their products by type (e.g., chesty, dry, tickly) to help customers choose.

Many people also choose to buy online. The key is to compare age suitability, the active ingredient, and whether the product is intended for a chesty or dry cough before making a purchase. Several UK pharmacy-style product pages and brand websites provide detailed ingredient lists and usage instructions.

Is Codeine Cough Syrup Still Available in the UK?

Codeine linctus, once a common over-the-counter cough medicine, has been subject to significant regulatory changes. In 2015, the MHRA restricted its use in children under 18 due to the risk of severe breathing problems. Then, in 2021, codeine linctus was reclassified as a prescription-only medicine for all ages in the UK. This means codeine cough syrup is no longer available to buy over the counter from a pharmacy or supermarket.

What is Codeine Linctus?

Codeine linctus is a cough medicine containing codeine, an opioid. It works by suppressing the cough reflex in the brain. Due to its potential for addiction and other serious side effects, it is now tightly controlled. For current regulatory details, you can refer to the MHRA codeine restrictions page.

Key Regulatory Timeline for Cough Syrups in the UK

1. 2015 – MHRA restricts codeine to prescription-only for under-18s due to respiratory risks.
2. 2021 – Codeine linctus reclassified as prescription-only at any age; OTC codeine cough syrup no longer available.
3. 2023 – MHRA confirms guaifenesin-based syrups remain safe OTC with appropriate labelling.

What We Know and What Remains Uncertain About Cough Syrups

Understanding Cough Types and Key Ingredients

The choice between an expectorant and a suppressant comes down to the type of cough. Expectorants like guaifenesin are intended for productive coughs (chesty coughs) to help clear mucus. Suppressants like dextromethorphan are for dry, hacking coughs. Soothing ingredients like glycerol and honey provide a coating effect that can calm an irritated throat. The NHS Guaifenesin leaflet offers more detail on how this ingredient works.

Sources and Official Guidance on Cough Syrups

“Cough medicines should only be used for a short time. Always read the label and do not exceed the dose.”

– NHS, ‘Cough Medicines’ page

“Codeine should not be used for cough in children under 18 years because of the risk of severe breathing problems.”

– MHRA, Drug Safety Update 2015

“Guaifenesin helps loosen phlegm and make coughs more productive.”

– Covonia product information

What to Do Next When Choosing a Cough Syrup

Stay updated on MHRA guidelines for paediatric cough syrups and potential new regulations on suppressants. Consider consulting a pharmacist for coughs lasting more than 3 weeks. For further reading on managing symptoms at home, see our guide on How to Treat a Cough at Home.

Frequently Asked Questions About Cough Syrup