Kim Loos Dr. Kimberly A. Loos practices general dentistry in San Jose, California. She is also a clinical instructor at University of Pacific School of Dentistry and an editor for Dentistry On-Line. As with any medication, there are possible side effects related to use of anesthetics.
Some side effects are local and some are systemic.
Systemic reactions of local anesthetics are generally related to either extensions of the basic pharmacological effects or allergic reactions. When any drug is administered, desired and undesired drug actions are seen. The key is to enhance the desired effects while minimizing the undesired effects. Some side effects of local anesthetic administration may include talkativeness, apprehension, excitability, and increased blood pressure, heart rate, and breathing. If a local anesthetic with epinephrine is used, a patient might experience headache, weakness, dizziness, perspiration, and tremor.