What Are Common Novocaine Side Effects?

Closeup portrait, beautiful, pretty young woman in sweater picking up, smelling, choosing green leafy vegetables in grocery store

Novocaine (or novocain), also known as procaine hydrochloride, is a local anesthetic that is commonly used during dental procedures, like cavity fillings. The Indian Dental Association mention that Lidocaine and novocaine are cocoa plant (erythroxylum coca) derivative and therefore safe. It often works very quickly and its effects do not usually last long. While it is considered a safe drug for most people by the FDA, there are some common and some not-so-common Novacaine side effects that you should be aware of before using.

According to Drugs.com, the most common side effects are numbness, tingling and some minor pain around the injection site. These side effects are usually not severe and often subside within a few hours of the injection. In some cases, other more serious side effects occur, such as difficulty breathing, swelling, hives, or closing of the throat. These are the signs of an allergic reaction and need to be treated right away. Other rare side effects include chest pain or irregular heartbeats, dizziness or drowsiness, anxiety, restlessness, nausea, vomiting, trembling, or seizures. These are much less common, but because they can be very dangerous, it is important to tell your dentist right away if you experience any of them.

Your dentist will determine the best dosage of Novocaine to use for you. It is very important for you to tell your dentist about any medications that you are taking, both over the counter and prescriptions, as well as any health conditions that you have. Sometimes Novocaine can interact with other drugs, causing dangerous side effects, or it can make some health conditions worse. Being up front with your dentist about medications and health conditions will help minimize the risk of you experiencing any dangerous Novocaine side effects.

This article is intended to promote understanding of and knowledge about general oral health topics. It is not intended to be a substitute for professional advice, diagnosis or treatment. Always seek the advice of your dentist or other qualified healthcare provider with any questions you may have regarding a medical condition or treatment.

More Articles You May Like


  1. Preparation – If you need local anesthesia, your dentist will dry part of your mouth with air or use cotton rolls. Then your dentist will swab the area with a gel to numb the skin.

  2. Injection – Next, your dentist will slowly inject the local anesthetic into the gum tissue. Most people don't feel the needle. Instead, the sting they feel is caused by the anesthetic moving into the tissue.

  3. After effects – An injection of local anesthesia can last up to several hours. After you leave the dentist's office, you may find it difficult to speak clearly and eat or drink. Be careful not to bite down on the area that is numbed. You could cause damage to yourself without realizing it.