Lidocaine (Lignocaine) is a prescription medicine containing lidocaine, also known as lignocaine, used to provide local anaesthesia and reduce pain by temporarily blocking nerve signals in the body. It is commonly used to numb skin, mucous membranes, or deeper tissues before procedures, and it may also be used in certain heart rhythm disorders under medical supervision. This medicine should be used only as directed because too much lidocaine can cause serious side effects, including effects on the heart and nervous system.

Lidocaine (Lignocaine) is a medicine that helps reduce pain and discomfort by blocking sodium channels in nerve cells. Lidocaine stops nerves from sending pain signals to the brain, which produces a temporary numbing effect in the treated area. Depending on how it is used, it may help during minor procedures, relieve local pain, or be used in selected medical settings for abnormal heart rhythms.

This medicine should be taken or applied only under medical supervision. Your doctor will decide the correct dose and duration based on your condition, age, and any other medicines you may be using. It is important not to use more than recommended, because lidocaine can be absorbed into the body and may affect the nervous system or heart if overused. Extra care is needed if you have liver disease, heart rhythm problems, seizure disorders, or if you are taking other medicines that affect the heart or nervous system, since closer monitoring may be required.

Although Lidocaine (Lignocaine) does not treat the underlying cause of pain or disease, it can help control symptoms and improve comfort during treatment or procedures. Temporarily blocking pain signals provides fast relief when used correctly under medical guidance.

Lidocaine (Lignocaine) is typically indicated by a doctor for

Local pain relief

To numb the skin or tissues and reduce pain during or after minor procedures.

Surface anaesthesia

To help reduce pain, burning, or irritation in localised areas.

Cardiac rhythm support

In selected cases, to help manage certain abnormal heart rhythms under hospital supervision.

Procedure-related numbness

To make examinations or minor interventions more comfortable.

• Lidocaine (Lignocaine) may help reduce pain quickly by blocking nerve transmission in the area where it is used. It can make procedures more comfortable, ease localised burning or irritation, and provide short-term relief from pain in suitable situations. When used correctly, it acts fast and allows targeted pain control without affecting the whole body in the same way as general pain medicines.

• In hospital settings, it may also help doctors manage certain heart rhythm problems under careful monitoring.

Lidocaine (Lignocaine) may cause side effects, although not everyone will experience them. Most reactions are mild and temporary, but some can be more serious and require medical attention.

Common Side Effects

• These are usually mild and often improve as your body adjusts:

• Burning or stinging at the application site

• Redness, itching, or mild swelling

• Numbness in the treated area

• Dizziness or light-headedness

• Mild nausea

• Temporary taste changes if used near the mouth

Uncommon Side Effects

• These may occur less often but can still affect some patients:

• Headache

• Blurred vision

• Sleepiness or fatigue

• Tremor or shakiness

• Fast heartbeat

• Rash or skin irritation

Serious Side Effects (Require Immediate Medical Attention)

• Although rare, these reactions can be serious. Contact your doctor right away if you notice:

• Difficulty breathing or a severe allergic reaction, such as swelling of the face or throat

• Seizures, confusion, or extreme drowsiness

• Blue lips or skin, which may suggest low oxygen levels or methemoglobinemia

• Abnormal heartbeat, chest pain, or fainting

• Signs of too much lidocaine in the body include ringing in the ears, metallic taste, numbness around the mouth, or loss of coordination.

• Take Lidocaine (Lignocaine) exactly as suggested by your doctor, based on your health condition, age, and other medicines you may be using.

• It is usually used as directed by a healthcare professional to provide local numbness or pain relief, and the exact way it is taken or applied depends on the clinical need.

• Try to use it at the same time each day if your doctor has asked you to use it regularly.

• Use only the prescribed amount. Do not use more than directed, because too much lidocaine can be absorbed into the body and may cause serious side effects.

• Do not change the dose or frequency on your own. Always follow medical advice.

• If Lidocaine (Lignocaine) is used in the mouth or throat, follow your doctor’s instructions carefully because it can reduce the ability to feel and swallow normally.

• Lidocaine (Lignocaine) contains lidocaine, also known as lignocaine, which is a local anaesthetic.

• It works by blocking sodium channels in nerve cells, which stops pain signals from travelling to the brain.

• This action numbs the treated area and helps reduce pain, burning, or discomfort.

• In some medical settings, lidocaine may also be used to help control certain abnormal heart rhythms under close supervision.

• Together, these effects provide targeted pain relief and temporary numbness when used exactly as prescribed.

• For best results, use Lidocaine (Lignocaine) exactly as directed by your doctor. Do not use more than recommended, because too much lidocaine can be absorbed into the body and may cause serious side effects.

• Use the medicine only on the intended area. Avoid contact with the eyes, nose, and mouth unless your doctor specifically tells you otherwise.

• If Lidocaine (Lignocaine) is used on the skin, apply it to clean, intact skin only unless your doctor gives different instructions. Do not use it on broken, irritated, or infected skin unless prescribed.

• If your doctor has told you to use it in the mouth or throat, follow the instructions carefully, because it can reduce feeling and affect swallowing.

• Be especially careful in children and older adults, as they may be more sensitive to the effects of lidocaine.

• Store at room temperature in a cool, dry place away from direct sunlight and heat.

• Keep the container tightly closed and out of the reach of children.

• Do not use the medicine after the expiry date, and discard any leftover product as advised by your pharmacist.

• Meals (NO INTERACTION): Food does not usually affect lidocaine use because it is not taken in the same way as most oral medicines.

• Alcohol (CAUTION): Alcohol may increase dizziness or drowsiness in some people, so limit alcohol while using Lidocaine (Lignocaine).

Tell your doctor about all medicines and supplements you use before starting Lidocaine (Lignocaine).

• Other local anaesthetics (CAUTION): Using more than one numbing medicine together may increase the risk of toxicity.

• Antiarrhythmic medicines (CAUTION): Some heart medicines can increase the chance of side effects when used with lidocaine.

• Medicines that affect the liver (CAUTION): Drugs that change liver enzyme activity may alter how lidocaine is broken down.

• Beta-blockers and cimetidine (CAUTION): These medicines may increase lidocaine levels in some people.

• Liver Impairment (CAUTION): Lidocaine is processed by the liver, so people with liver disease may need a lower dose or closer monitoring.

• Heart Rhythm Problems (CAUTION): Extra caution is needed in people with irregular heart rhythms or heart disease, because too much lidocaine can affect the heart.

• Seizure Disorders (CAUTION): High levels of lidocaine can increase the risk of nervous system side effects, including seizures.

• Methemoglobinemia Risk (CAUTION): People with a history of methemoglobinemia or certain blood disorders should use lidocaine only under medical advice

• Taking too much lidocaine can cause numbness around the mouth, ringing in the ears, blurred vision, dizziness, confusion, tremors, low blood pressure, abnormal heartbeat, or seizures.

• If overdose is suspected, seek emergency medical help right away.

If you miss a dose, use it as soon as you remember, only if it is still appropriate to do so.

If it is almost time for the next dose, skip the missed dose.

Do not use extra medicine to make up for a missed dose.