What can be a consequence of administering too much local anesthetic?

Administering too much local anesthetic can lead to local anesthetic toxicity, which is a serious complication that can result from either exceeding the maximum recommended dosage or from rapid absorption into the bloodstream. This toxicity can elicit a wide range of symptoms, affecting both the central nervous system and the cardiovascular system.

In the central nervous system, signs of toxicity may include tinnitus, metallic taste, agitation, seizures, or even loss of consciousness. Cardiovascular effects can manifest as arrhythmias, decreased myocardial contractility, or hypotension. These systemic effects highlight the importance of carefully calculating dosages based on the patient's weight, age, and overall health status, and monitoring the patient closely after administration.

Understanding local anesthetic toxicity must be a fundamental part of training for administering anesthesia. It underscores the critical balance needed in practice to provide effective pain relief while minimizing risks to the patient's safety.