How does lidocaine work?
Lidocaine blocks nerve signals in the body, preventing pain signals from reaching the brain. It can be applied to the skin, injected, or used as a mouth rinse or spray.
What is lidocaine used to treat?
Lidocaine is commonly used for:
- Numbing the skin or gums before minor procedures
- Pain relief from mouth ulcers, sore throats, or teething pain
- Nerve pain (neuropathy) and post-shingles pain
- Treating irregular heartbeats (arrhythmias) in hospital settings
Who can take lidocaine?
Lidocaine is suitable for most adults and children, but your doctor or pharmacist will determine if it’s right for you.
Who might not be able to take lidocaine?
Lidocaine may not be suitable if you:
- Have severe liver or kidney disease
- Have a heart condition or irregular heartbeat
- Have a history of seizures
- Are allergic to lidocaine or other local anaesthetics
Can I take lidocaine if I’m pregnant or breastfeeding?
Lidocaine is generally safe during pregnancy and breastfeeding, but always check with your doctor before using it.
What if I miss a dose?
Lidocaine is usually taken as needed for pain relief, so missing a dose is not usually an issue. Follow your doctor’s instructions if using it regularly.
How effective is lidocaine?
Lidocaine is highly effective at numbing pain when applied correctly, usually working within minutes.
What should I do if I take too much?
Taking too much lidocaine can cause numbness in unintended areas, dizziness, confusion, or heart problems. If you think you’ve used too much, seek emergency medical help immediately.
What dose of lidocaine is usually taken?
- For skin numbing: Apply a thin layer of cream or gel as directed
- For mouth ulcers or sore throats: Use a small amount of gel or spray up to 4 times daily
- For nerve pain: Lidocaine patches are applied once daily for up to 12 hours
Your doctor will determine the best dose based on your condition.
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What are the side effects of lidocaine?
Common side effects include:
- Temporary numbness or tingling
- Mild skin irritation
- Sore throat (when used in the mouth)
Serious side effects, such as difficulty breathing, irregular heartbeat, or seizures, require urgent medical attention.
How should I use lidocaine?
Lidocaine is available as cream, gel, spray, patches, or injections. Follow the instructions carefully and avoid using too much in one area.
When should lidocaine be used?
Lidocaine should be used only when needed for pain relief or before a medical procedure. Do not exceed the recommended dose.
What are the brand names for lidocaine?
Lidocaine is available as a generic medicine, but some branded versions include:
- Lignocaine
- Xylocaine
- Versatis (lidocaine patches)
Final thoughts
Lidocaine is an effective local anaesthetic and pain reliever that provides quick relief when used correctly. Always follow dosing instructions and speak to your doctor or pharmacist if you experience side effects or need further guidance.
