Lidocaine Injection

What You Need To Know

Lidocaine injection is just one of the many forms of lidocaine, a numbing medication that is commonly used in many basic medical procedures. It works by blocking nerve signals in the body, producing a numbing effect on the area, thus helps reduce pain or discomfort caused by minor surgery and many other medical and dental procedures. In addition to injection, lidocaine can be given through infusion.

Common Uses

– To treat arrhythmias or seizure.
– To address arthritis pain (typically combined with cortisone).
– To ease pain during and after dental procedures. In some cases, there are people who don’t get pain relief from lidocaine because of odd placement of nerves through the mouth.
– To reduce pain or discomfort during or after a surgery.
– To reduce pain caused by insertion of a catheter or breathing tube.

Contraindications and Precautions

Lidocaine injection should not be given to the following:

Lidocaine Injection– People who are allergic to lidocaine or any other type of numbing medicine.
– People who have any of these conditions: liver disease; kidney disease; heart disease; nerve or spine problems; coronary artery disease; circulation problems; or a history of malignant hyperthermia, or you may have to adjust the dosage or take special tests to safely use lidocaine.
– Pregnant women are usually not allowed to have a lidocaine injection, since this does easily pass to the fetus and may cause side effects. The effects on newborn babies could include poor muscle tone for a few days after birth and often rather more serious reactions.
– People with mental disorders. There are also some medications prescribed for these patients that could potentially contraindicate with this drug. This is why it is very important to check the patient’s full drug and medical history first before using this medication.
– People taking medications, either by prescription or over the counter, which may alter performance, should avoid this drug. These medications include other anesthetics, vasopressor medications, beta-blockers, muscle relaxants, antihistamines, psychiatric drugs, anti-anxiety medications, and anti-seizure medicine. Other specific prescription medications that must be avoided from combining with lidocaine include arbutamine, pimozide, dofetilide, and halofantrine.


Most individuals have their lidocaine injection administered by a dentist, doctor, or nurse and amount given normally depends on their needs. It’s given through a needle placed into a vein or directly into the area of the body to be numbed. Things that will be monitored closely after the administration includes the breathing, blood pressure, oxygen levels, and other vital signs. To relieve uneven heart rhythms, patients may be demonstrated how to properly use this medicine at home. They are warned not to self-inject this medicine if they don’t completely understand the instructions on how to administer the injection and proper needle disposal and other items used in giving this medication.

Things To Be Avoided

After having a lidocaine injection, patients must avoid driving hours after using this medication. Patient must also avoid eating or chewing within 1 hour after the injection is given to numb the mouth or throat. They may have trouble swallowing, which could result in choking. They may also tend to accidentally bite the inside of their mouth if they are still numb an hour after treatment with this medication.

Overdosage: What To Do

An overdose of lidocaine can be life threatening. In case of overdosage, seek emergency medical attention immediately. Symptoms of overdosage may typically include drowsiness, confusion, nervousness, ringing in the ears, blurred vision, feeling hot or cold, numbness, muscle twitches, irregular heartbeats, seizure (convulsions), slowed breathing, or respiratory failure (breathing stops).