Management and Prevention of Neuromodulator Complications

January 2025 | Volume 24 | Issue 1 | 7 | Copyright © January 2025


Published online December 20, 2024

doi:10.36849/JDD.8355

Jean Carruthers MDa, Sabrina Fabi MDb, Michael Kane MDc, Nowell Solish MDd, Steven H. Dayan MDe

aDr Jean Carruthers Cosmetic Surgery, Inc., Vancouver BC, Canada
bUniversity of California San Diego Medical Center, San Diego, CA
cKane Plastic Surgery, New York, NY
dDepartment of Dermatologic Surgery, University of Toronto, Canada
eUniversity of Illinois, Chicago, IL

Abstract
The use of neuromodulators for cosmetic purposes has a remarkable safety record; nevertheless, unwanted effects can and do sometimes occur when neurotoxins are used for facial rejuvenation, such as neutralizing antibodies and eyelid ptosis. The primary objective of the following roundtable discussion was to review the most commonly reported complications from neurotoxins and summarize considerations for reducing the risk of complications. A roundtable discussion was held by 5 notable experts in their field during a special addition of the Thriving in Diversity webinar series on Thursday, February 15, 2024. Three presenters were provided with an opportunity to share their knowledge. Common complications associated with the use of neuromodulators include lack of response due to neutralizing antibody formation and eyelid ptosis. Common complications, such as neutralizing antibodies, can often be prevented by avoiding known risk factors. The use of topical alpha adrenergic agonists can often improve the appearance of eyelid ptosis. The cosmetic use of neuromodulators remains extremely safe, and serious adverse events rarely occur.

J Drugs Dermatol. 2025;24(1):7-11. doi:10.36849/JDD.8355

INTRODUCTION

The demand for cosmetic surgical procedures has continued to increase in recent years. Compared with pre-pandemic statistics, the overall number of procedures increased by 19% from 2019 to 2022.1 Among minimally invasive procedures, the injection of neuromodulators has been by far the most prevalent and shown the greatest change, increasing from 5,043,057 procedures in 2018 to 8,736,591 in 2022, a 73% increase.1 The use of neuromodulators for cosmetic purposes has a remarkable safety record. Serious adverse events from approved products, such as suspected toxin-related anaphylaxis are extremely rare,2 and reports of toxin spread,3 or iatrogenic botulism, have only been associated with medical uses, such as cervical dystonia.4,5 Nevertheless, unwanted effects can and do sometimes occur when neurotoxins are used for facial rejuvenation, such as neutralizing antibodies,6 facial flaccidity,7 and eyelid ptosis.8

Objectives
The objectives of the roundtable discussion were to describe the most commonly reported complications from neurotoxins; consider manufacturing and product differences of the most popular neurotoxins and how this may influence the safe use for aesthetic treatments; discuss effective communication channels, styles, and listening skills for patients experiencing complications; and summarize considerations for reducing the risk of complications.

MATERIALS AND METHODS

A roundtable discussion was held by this manuscript's authors, 5 notable experts in their field during a special addition of the Thriving in Diversity webinar series on Thursday, February 15, 2024.9 Three presenters were provided an opportunity to share their knowledge while they and other experts responded to audience questions. This activity was planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint providership of FabDay LLC and Advancing Knowledge in Healthcare (AKH, Inc.), which provided activity accreditation.

DISCUSSION

Neutralizing Antibodies
The injection of neuromodulators is by far the most prevalent among minimally invasive procedures1 and, while it has an undisputed safety record, treatment failures occasionally occur. The successful use of aesthetic botulinum toxin injections is occasionally hindered by immunogenic and non-immunogenic causes. Reasons for non-immunogenic treatment failure include underdosing, poor injection technique, and over-aggressive product reconstitution;10,11 while immunogenic treatment failure is caused by neutralizing antibodies that have formed against the active toxin or associated complexing proteins.12 The roundtable discussion began with a presentation by one