Nircaine Injection is a local anesthetic. It is used during minor surgical procedures such as dental, oral, diagnostic, or other therapeutic procedures to anesthetize or numb the surgical area. Nircaine Injection must be administered by healthcare professionals. It blocks the pain signals to reach the brain by temporarily numbing the surgical area and helps to perform a painless procedure. This medicine is generally safe with little or no side effects. However, it may cause injection site reactions, such as pain, swelling, and redness, in some people. These are usually mild and short-lived. If the numbness or other side effects persist at the injection site, consult your doctor without any delay. Before using Nircaine Injection, it is very important to tell your doctor if you have any underlying heart disease or are taking medicines for heart rhythm problems. Ask your doctor for advice if you are pregnant or breastfeeding. Also, the medicine may cause dizziness. So avoid driving or operating heavy machinery while on medication.