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LMX4 Lidocaine 4% Cream - 30g

LMX4 Lidocaine 4% Cream - 30g

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  • ✔️ Numbs skin within 30 minutes using liposomal lidocaine technology
  • ✔️ Reduces pain from injections, cannulation, and minor procedures
  • ✔️ Suitable for adults and children aged 3 months and over
  • ✔️ 4% lidocaine concentration for effective topical anaesthesia
  • ✔️ 30g tube provides multiple applications per pack

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What Is Lidocaine Cream 4% and How Does It Help?

 

If you've ever dreaded a blood test, cannula insertion, or minor skin procedure, you'll know that anticipating the needle is often worse than the procedure itself. Lidocaine cream 4% — sold under the brand name LMX4 — is a topical local anaesthetic designed to numb the skin before exactly these kinds of situations. Applied to intact skin roughly 30 to 60 minutes before a procedure, it temporarily blocks pain signals so you feel significantly less discomfort. It's available over the counter in the UK, making it genuinely accessible for patients who want to take control of their comfort ahead of planned procedures.

LMX4 uses a liposomal delivery system, which means the lidocaine is encapsulated in tiny lipid spheres that help it penetrate the skin more efficiently. This 30g tube is a practical size — enough for multiple applications — and is suitable for adults and children aged 3 months and over when used appropriately. You can browse our full range of creams and ointments if you're looking for other topical treatments alongside this product.

 

How Does LMX4 Lidocaine Cream Work on the Skin?

 

Lidocaine is a well-established local anaesthetic that works by blocking voltage-gated sodium channels in peripheral nerve endings. In plain terms, it stops the nerves just beneath your skin from sending pain signals to your brain. The result is a localised, temporary numbness that wears off naturally once the cream is removed and the drug disperses.

  • Lidocaine penetrates the outer layers of intact skin via the liposomal carrier.
  • It binds to sodium channels in sensory nerve fibres, preventing depolarisation.
  • Pain signal transmission is temporarily interrupted at the application site.
  • Numbness typically develops within 30 minutes and lasts for a short period after removal.

 

Who Is LMX4 Cream Suitable For?

 

LMX4 is suitable for a wide range of people who need localised skin numbing before minor procedures. It's particularly popular among patients who experience needle anxiety, parents preparing children for vaccinations or blood draws, and individuals undergoing cosmetic treatments such as laser therapy or tattooing. That said, it isn't right for everyone.

  • Adults requiring skin numbing before injections, cannulation, or minor dermatological procedures.
  • Children aged 3 months and over — under medical supervision and with weight-appropriate dosing.
  • Patients with needle phobia who want to reduce procedural discomfort.
  • Individuals undergoing cosmetic skin procedures where topical anaesthesia is appropriate.

It should not be used on broken, inflamed, or infected skin, or near the eyes and mucous membranes. People with a known hypersensitivity to lidocaine or other amide-type local anaesthetics should avoid it entirely.

 

How Does LMX4 Compare to Other Topical Anaesthetic Creams?

 

Feature LMX4 Lidocaine 4% Cream EMLA Cream (Lidocaine 2.5% / Prilocaine 2.5%)
Active ingredient(s) Lidocaine 4% (liposomal) Lidocaine 2.5% + Prilocaine 2.5%
Onset of action ~30 minutes ~60 minutes (typically)
Suitable for children From 3 months (with supervision) From 1 year (standard use)
OTC availability in UK Yes Yes (some formulations)

 

How Should You Store LMX4 Cream and Is It Safe Long-Term?

 

Store LMX4 below 25°C and do not freeze it. Keep the tube tightly closed when not in use and store it out of the reach and sight of children. Check the expiry date printed on the packaging before each use — do not use the cream after this date, even if it looks and smells normal.

LMX4 is intended for short-term, procedural use rather than ongoing daily application. If you find yourself needing regular pain relief for a skin condition, it's worth speaking to your GP or pharmacist about longer-term options. You might also find our pain relief collection useful for managing discomfort in other ways. 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.

LMX4 Lidocaine 4% Cream 30g specifications
Treatment category Topical local anaesthetic
Mechanism of action Sodium channel blockade in peripheral sensory nerve endings
Effective for Skin numbing before injections, cannulation, and minor procedures
Suitable for Adults and children aged 3 months and over (with supervision)
Active ingredient Lidocaine 4% w/w (liposomal formulation)
Pack size 30g tube
Strength 4% w/w
UK classification General Sale / Pharmacy (P) medicine
Drug class Amide-type local anaesthetic
Preparation Cream
Route of administration Topical (intact skin only)

Specifications of LMX4 Lidocaine 4% Cream 30g

 

What Is LMX4 Lidocaine 4% Cream and What Is It Used For?

 

LMX4 Lidocaine 4% Cream is a topical local anaesthetic used to numb intact skin before minor medical or cosmetic procedures. It contains lidocaine 4% w/w in a liposomal base, which helps the active ingredient penetrate the skin effectively. Common uses include numbing the skin before venepuncture (blood tests), intravenous cannulation, vaccination injections, minor dermatological procedures, and certain cosmetic treatments such as laser therapy or tattooing. It is not a painkiller for ongoing conditions — it is specifically designed for short-term, procedural skin numbing.

 

What Do You Need to Know Before Using LMX4 Cream?

 

Before applying LMX4, it's important to check whether it is appropriate for you. Do not use this cream if any of the following apply:

  • You are allergic to lidocaine, any other amide-type local anaesthetic, or any ingredient in the formulation.
  • The skin at the application site is broken, inflamed, infected, or eczematous.
  • You need to apply it near the eyes, ears, or mucous membranes.
  • You are applying it to a child under 3 months of age.
  • You have a condition called glucose-6-phosphate dehydrogenase (G6PD) deficiency — lidocaine may increase the risk of methaemoglobinaemia.

Tell your pharmacist or doctor if you are pregnant, breastfeeding, or planning to become pregnant. Lidocaine crosses the placenta, so use during pregnancy should only occur if clearly necessary and under medical guidance.

The following medicines may interact with LMX4. Always inform your healthcare provider if you are taking:

  • Antiarrhythmic drugs such as mexiletine or amiodarone — combined use may increase the risk of cardiac side effects.
  • Other local anaesthetics — additive systemic effects are possible if large areas are treated.
  • Medicines that can cause methaemoglobinaemia (e.g. certain sulphonamides, dapsone) — risk may be increased.

 

How Should You Use LMX4 Lidocaine 4% Cream?

 

Using LMX4 correctly is straightforward, but the timing and technique do matter. Applying too little or removing it too early can mean the numbing effect isn't sufficient when you need it most. Follow these steps:

  1. Identify the area of intact skin where the procedure will take place.
  2. Apply a thick layer of LMX4 cream — approximately 1–2.5g per 10cm² of skin — to the target area.
  3. Cover the cream with an occlusive dressing (such as cling film or a Tegaderm patch) to keep it in place and enhance absorption.
  4. Leave the cream on for 30 to 60 minutes before the procedure.
  5. Remove the dressing and wipe away all remaining cream with a clean cloth or gauze immediately before the procedure begins.
  6. Do not rub the cream into the skin — it should sit on top under the dressing.
Indication Age Group Dose Application Time
Venepuncture / cannulation Adults 1–2.5g per site 30–60 minutes
Minor skin procedures Adults Up to 10g (max area) 30–60 minutes
Venepuncture / cannulation Children (3 months+) As directed by clinician (weight-based) 30–60 minutes

If you're also managing other skin concerns, our skin care collection includes a range of products that may complement your routine.

 

What Are the Possible Side Effects of LMX4 Cream?

 

Like all medicines, LMX4 can cause side effects, although not everyone experiences them. Most reactions are mild and localised to the area where the cream was applied.

Common side effects (may affect up to 1 in 10 people):

  • Temporary redness (erythema) at the application site
  • Mild burning or stinging sensation during application
  • Skin pallor (paleness) or blanching
  • Localised oedema (swelling)

Less common side effects (may affect up to 1 in 100 people):

  • Skin rash or itching (pruritus)
  • Contact dermatitis at the application site
  • Altered skin sensation (e.g. tingling or numbness persisting beyond expected duration)

Serious systemic side effects are rare when LMX4 is used as directed on intact skin. However, if you notice signs of an allergic reaction — such as swelling of the face or throat, difficulty breathing, or a widespread rash — seek emergency medical attention immediately. Methaemoglobinaemia (a rare blood disorder) has been reported with lidocaine-containing products, particularly in infants or when used in excessive quantities.

 

How Should You Store LMX4 Cream?

 

  • Store below 25°C in a cool, dry place.
  • Do not freeze the cream — freezing can alter the liposomal formulation.
  • Keep the tube tightly closed after each use.
  • Store out of the sight and reach of children.
  • Do not use after the expiry date printed on the tube and carton.
  • Do not dispose of medicines via wastewater or household waste — return unused product to your pharmacist for safe disposal.

If you're looking for other first aid or procedural support products, our first aid collection has a range of useful items to keep at home.

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 LMX4 Lidocaine 4% Cream online in the UK?

You can buy LMX4 Lidocaine 4% Cream 30g directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for £20.99. It is available without a prescription and dispatched quickly to your door. No GP visit is required for this over-the-counter topical anaesthetic.

How does LMX4 lidocaine cream 4% work in the body?

LMX4 works by blocking sodium channels in the sensory nerve endings just beneath the skin, which temporarily stops pain signals from travelling to the brain. The liposomal formulation helps the lidocaine penetrate the skin layers more efficiently than some other topical anaesthetics. The result is localised numbness at the application site that lasts for a short period after the cream is removed.

How long does LMX4 cream take to work?

LMX4 typically begins to produce noticeable skin numbing within 30 minutes of application under an occlusive dressing. For deeper or more reliable anaesthesia, leaving it on for the full 60 minutes is recommended. The numbing effect begins to wear off naturally once the cream is removed.

How do I apply LMX4 cream step by step?

Apply a thick layer of LMX4 to the intact skin area where the procedure will occur, then cover it with an occlusive dressing such as cling film or a Tegaderm patch. Leave it in place for 30 to 60 minutes, then remove the dressing and wipe away all the cream with a clean cloth immediately before the procedure. Do not rub the cream into the skin — it should sit on the surface under the dressing to work correctly.

What is the correct dose of LMX4 cream for adults?

For most adults, approximately 1 to 2.5g of cream per 10cm² of skin is sufficient for procedures such as venepuncture or cannulation. The maximum recommended amount for larger skin areas should not exceed 10g in adults. Always follow the instructions in the patient information leaflet or the guidance of your healthcare provider.

Can children use LMX4 lidocaine cream?

LMX4 can be used in children aged 3 months and over, but only under medical supervision and with careful weight-based dosing. The amount applied must be strictly controlled in young children to avoid systemic absorption of lidocaine. Always consult a healthcare professional before using any topical anaesthetic on an infant or young child.

What are the side effects of LMX4 cream?

The most common side effects are mild and localised to the application site, including temporary redness, skin pallor, mild burning, or stinging. These typically resolve quickly once the cream is removed. Serious allergic reactions are rare but require immediate medical attention if they occur.

How do I manage side effects of LMX4 cream?

If you experience mild redness or stinging at the application site, simply remove the cream and the symptoms should settle on their own within a short time. Avoid applying the cream to broken or irritated skin, as this increases the risk of local reactions. If you develop signs of an allergic reaction such as widespread rash, swelling, or difficulty breathing, seek emergency medical help immediately.

Is LMX4 the same as EMLA cream?

LMX4 and EMLA are both topical anaesthetic creams but they are not identical. LMX4 contains 4% lidocaine in a liposomal base, while EMLA contains a combination of 2.5% lidocaine and 2.5% prilocaine. LMX4's liposomal delivery system may allow it to work faster — often within 30 minutes compared to EMLA's typical 60-minute application time.

Who should not use LMX4 cream?

LMX4 should not be used by anyone with a known allergy to lidocaine or other amide-type local anaesthetics. It must not be applied to broken, inflamed, or infected skin, or near the eyes and mucous membranes. People with G6PD deficiency or those taking certain antiarrhythmic medicines should speak to their doctor before use. You can find other suitable pain relief options if LMX4 is not appropriate for you.

Can I use LMX4 cream before a tattoo?

Many people use topical anaesthetic creams before tattooing to reduce discomfort, and LMX4 is sometimes used for this purpose. However, you should always inform your tattoo artist that you have applied a numbing cream, as it can occasionally affect skin texture during the procedure. It is also worth checking with your tattoo studio beforehand, as some artists have specific preferences regarding topical anaesthetics.

Can I use LMX4 cream on my face?

LMX4 should not be applied near the eyes, inside the nose, or on mucous membranes. If you need numbing on facial skin for a cosmetic or medical procedure, speak to your healthcare provider first to confirm it is safe and appropriate for your specific situation. Careful application away from sensitive facial areas is essential.

What are the alternatives to LMX4 cream?

The main alternative topical anaesthetic cream available in the UK is EMLA (lidocaine 2.5% / prilocaine 2.5%), which is also available over the counter. Other options include lidocaine-containing gels or sprays for specific applications. Browse our creams and ointments collection to explore available topical treatments.

How long can you use LMX4 cream for?

LMX4 is intended for short-term, procedural use rather than regular daily application. There is no defined maximum course length, but it should only be used when skin numbing is needed for a specific procedure. If you find you need frequent anaesthesia for a recurring condition, speak to your GP about the most appropriate management plan.

What are the latest studies on lidocaine cream 4% for pain relief?

Research continues to support the use of topical lidocaine formulations for procedural pain reduction, particularly in paediatric and needle-phobic populations. Liposomal lidocaine formulations like LMX4 have been studied for their faster onset compared to eutectic mixtures, with clinical evidence suggesting effective anaesthesia within 30 minutes. Always refer to current NHS or NICE guidance for the most up-to-date clinical recommendations on topical anaesthetics.

How Should You Use LMX4 Lidocaine 4% Cream?

LMX4 is applied topically to intact skin only — never to broken, inflamed, or infected areas. The cream must be covered with an occlusive dressing after application to ensure the lidocaine absorbs properly and the numbing effect develops in time for your procedure. Follow these steps carefully:

What Is the Correct Dose of LMX4 Lidocaine 4% Cream?

The amount of cream you apply depends on the size of the area being treated and the age of the patient. Using more cream than necessary does not improve the numbing effect and may increase the risk of systemic absorption, particularly in children. Always use the minimum effective amount.

When Is the Best Time to Use LMX4 Lidocaine 4% Cream?

Apply LMX4 approximately 30 to 60 minutes before your planned procedure to allow sufficient time for the numbing effect to develop. If you are attending a clinic or hospital appointment, apply the cream at home before you leave — just make sure you time it correctly so the cream has been on for at least 30 minutes by the time the procedure begins. Do not apply it too far in advance, as the anaesthetic effect will begin to wear off once the cream is removed.

How Long Can You Use LMX4 Lidocaine 4% Cream For?

LMX4 is designed for short-term, procedural use and should not be applied continuously or used as a daily treatment. Each application should be limited to the time needed before a specific procedure — typically no more than 60 minutes under an occlusive dressing. If you require repeated use over an extended period, speak to your GP or pharmacist to ensure this is appropriate for your situation and that no underlying condition requires further assessment.

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

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What Are the Most Common Side Effects of LMX4 Cream?

Most people who use LMX4 correctly on intact skin experience only mild, localised reactions at the application site. These are generally short-lived and resolve on their own once the cream is removed. Common side effects include:

  • Temporary skin redness (erythema) at the treated area
  • Skin pallor or blanching (the skin may look paler than usual)
  • Mild burning or stinging sensation during or shortly after application
  • Localised swelling or oedema

What Are the Less Common Side Effects of LMX4 Cream?

Less frequently, some people may experience more noticeable skin reactions. These are still usually mild and confined to the area where the cream was applied. If any of the following persist or worsen, stop using the cream and speak to your pharmacist or GP. Less common side effects include:

  • Skin rash or itching (pruritus) at the application site
  • Contact dermatitis — an inflammatory skin reaction
  • Altered or prolonged skin sensation, such as tingling or numbness lasting longer than expected
  • Skin discolouration at the treated area

What Are the Serious Side Effects of LMX4 Cream?

Serious side effects from LMX4 are rare when the cream is used as directed on intact skin in appropriate quantities. However, if too much cream is applied, if it is used on broken skin, or if it is accidentally ingested, systemic absorption of lidocaine can occur. Signs of systemic toxicity include dizziness, confusion, irregular heartbeat, or seizures — these require immediate emergency medical attention.

Methaemoglobinaemia — a rare but serious blood disorder in which the blood's ability to carry oxygen is reduced — has been reported with lidocaine-containing products, particularly in infants and when used in excessive amounts. Symptoms include pale, grey, or blue-tinged skin (cyanosis), shortness of breath, and fatigue. Seek emergency help immediately if these occur.

What Should You Do If You Experience Side Effects of LMX4 Cream?

For mild local reactions such as redness or stinging, simply remove the cream and the symptoms should settle quickly without any further treatment. Avoid applying the cream to irritated or broken skin in future, as this increases the likelihood of a reaction. If you experience signs of a serious allergic reaction — including swelling of the face, lips, or throat, difficulty breathing, or a widespread rash — call 999 or go to your nearest A&E immediately.

Can LMX4 Cream Interact With Other Medicines?

LMX4 can interact with certain medicines, particularly those that affect heart rhythm or that also carry a risk of methaemoglobinaemia. If you are taking antiarrhythmic drugs such as mexiletine or amiodarone, the combined effect on cardiac conduction may be increased. Medicines such as dapsone or certain sulphonamide antibiotics may also increase the risk of methaemoglobinaemia when used alongside lidocaine. Always tell your pharmacist or doctor about all medicines you are currently taking before using LMX4, including over-the-counter products and supplements.

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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