What is a potential side effect of Lidocaine use?

Lidocaine is a local anesthetic and antiarrhythmic medication often used to manage pain or treat certain types of heart arrhythmias. One potential side effect associated with its use is the occurrence of neurological disturbances. This can manifest as symptoms such as dizziness, confusion, seizures, tinnitus, or even loss of consciousness. These disturbances are primarily due to Lidocaine's action on the nervous system, particularly when used in higher doses or in patients who may be more sensitive to the medication.

The other options represent different physiological effects that are not typically associated with Lidocaine. For instance, while bradycardia and hypotension can occur in response to various medications, these are not prominent side effects of Lidocaine when used appropriately. Hyperkalemia, which is an elevated level of potassium in the blood, is also not a common side effect of Lidocaine. Therefore, neurological disturbances are notable as a significant concern with Lidocaine use, particularly in cases of toxicity or overdose. Understanding these potential effects is crucial for managing patient care effectively.