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This activity provides a comprehensive overview of benzocaine, a local anesthetic within the ester class, extensively used in pain management. This session equips healthcare professionals with crucial insights essential for proficient pain control by elucidating its indications, mechanism of action, and contraindications. Emphasizing the significance of interprofessional collaboration, this activity underscores the necessity for meticulous monitoring and awareness of potential adverse events associated with benzocaine administration. Furthermore, it underscores the pivotal role of understanding benzocaine's pharmacology in tailoring treatment strategies to meet individual patient requirements, thereby optimizing therapeutic outcomes while mitigating the risk of adverse reactions. This program aims to empower healthcare professionals with the knowledge and skills necessary to utilize benzocaine reasonably, fostering enhanced patient care and safety. Objectives: Identify the indications for benzocaine use. Identify the most common adverse effects associated with benzocaine use. Determine the risks associated with initiating benzocaine use. Communicate the importance of collaboration among interprofessional team members to improve outcomes and treatment efficacy for patients who might benefit from benzocaine. Access free multiple choice questions on this topic.

Signs and Symptoms of Overdose Elevated methemoglobin levels above 10% can result in unexplained cyanosis. Within the range of 15% to 35%, symptoms like headache, tachycardia, dyspnea, and tachypnea may emerge. Further elevation leads to central nervous system manifestations, including confusion, coma, seizures, and apnea. Fatality is associated with methemoglobin levels surpassing 70%. Management of Overdose If the clinical staff suspects early signs of toxic methemoglobinemia in a patient after the use of benzocaine, supplemental oxygen and IV administration of a 1% solution of methylene blue are the recommended treatment. The dose is repeatable if no clinical improvement has occurred within the first hour of administration. Caution is necessary if administering a dosage greater than 7 mg/kg; this can worsen symptoms of methemoglobinemia. Ascorbic acid can also be given for suspected methemoglobinemia but has a slower action compared to methylene blue.[30][31] When used in a pain control regimen, 1 of the rarer life-threatening complications of benzocaine toxicity is local anesthetic systemic toxicity syndrome (LAST). Several case studies have shown that the fundamental mechanism of LAST depends on several factors, causing an overall decreased function in the cardiovascular and central nervous systems. These may include cardiac arrest or bradycardia, severe hypotension, and cardiac arrhythmias.[32] Toxicity symptoms may also involve convulsive syncope and seizures in patients after using local anesthetics, especially in the older adult population. Several case study analyses suggest prompt use of lipid emulsion therapy (20%) when there is suspicion of a seizure or a cardiovascular event in the patient. If a seizure due to benzocaine toxicity is suspected, the first step is airway management, followed by controlling the seizure and stabilizing hemodynamics.[33]

Benzocaine is administered in various forms for pain control and used in procedures such as awake intubations and transesophageal echocardiography. Interprofessional healthcare team members must be able to perform these procedures and administer benzocaine to work in a coordinated manner. Nurses, pharmacists, clinicians (MDs, DOs, NPs, PAs), and other healthcare workers involved in patient care should be well aware of the toxicity and adverse effects of benzocaine, such as methemoglobinemia and communicate in an interprofessional team manner to ensure effective therapy and prevent toxicity or adverse events. In the case of suspected methemoglobinemia, a medical toxicologist should be present and involved in the patient's care. With an interprofessional team approach, patients can receive the pain relief they need with a reduced potential for adverse events, leading to better patient outcomes.