|Articles|September 1, 2005

Allergic to Ester?

Some patients are allergic to ester-type anesthetics, such as procaine.

Some patients are allergic to ester-type anesthetics, such as procaine. In addition to substituting an amide-type anesthetic (such as lidocaine) in such patients, avoid using a multi-dose vial of any anesthetic; these all contain a paraben preservative that is clinically similar to ester-type local anesthetics. Single-dose vials do not contain preservatives.

- Bruce Becker, MD
Bloomsburg, Pa

Enhance your clinical practice with the Patient Care newsletter, offering the latest evidence-based guidelines, diagnostic insights, and treatment strategies for primary care physicians.

Latest CME

$(CME Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Tennessee$

Allergic to Ester?

Related Content

Primary Care Lens: What HR 1 Means for Medicaid and Primary Care

FDA Approves Mucinex 12HR Cold & Fever, First New OTC Cold and Flu NDA in 14 Years

Centanafadine Gains FDA Approval for ADHD Across Age Groups

New CVD Risk Model Flags Heart Disease Earlier in Reproductive-Age Women

5 FDA Decisions for Primary Care to Know from July 2026

Latest CME

(CME Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Tennessee

Empire State Hematology & Oncology Society (New York)

South Carolina Oncology Society

(CME Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Washington

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2– Metastatic Breast Cancer | Kansas Society of Clinical Oncology

(CME Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Montana/Wyoming

(CME Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – North Carolina

Une Vision d’Espoir: Lighting the Way in GA Management & Treatment

Dissecting Clinical Trial and Real-World Data for ADCs in TNBC

Burst CME: Managing Fluid Overload in Patients with Chronic Kidney Disease (Part 2)

Breaking Down the Rationale for Targeting TROP2 in TNBC

Evaluating the Latest Data and Ongoing Trials for Novel ADC Approaches in TNBC

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2– Metastatic Breast Cancer | Louisiana Oncology Society

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2– Metastatic Breast Cancer | Missouri Oncology Society

Community Oncology Connections™: Advancing Precision Testing and HER2-Targeted Care for Gastroesophageal Adenocarcinoma – Arizona

Breaking Down the Latest Clinical Data for First-line Maintenance and R/R SCLC

Kansas Society of Clinical Oncology

(CME Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Nevada

24th Annual International Congress on the Future of Breast Cancer® East

(CME Track) SoCal Psych 2025: Overcoming Barriers to Long-Acting Injectable Agents in Schizophrenia

Show Me the Data®: New and Emerging Roles for Oral SERD Therapy in the Treatment of ER+/HER2– Breast Cancer

Expert Roundtable and Panel Discussions: Current and Future Landscape of TNBC

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Wisconsin Association of Hematology and Oncology

25th Annual International Congress on the Future of Breast Cancer® West

25th Annual International Congress on the Future of Breast Cancer® East

Arizona Clinical Oncology Society

Medical Crossfire®: BPDCN in 2026—Expert Perspectives on Diagnosis, Frontline Therapy, and the Evolving CD123-Directed Pipeline

10th Annual Live Medical Crossfire®: Hematologic Malignancies

Cases & Conversations: Real-World Insights on the Diagnosis and Management of Cold Agglutinin Disease

Medical Crossfire®: Maximizing Durability Across Retinal Disease — What 3 Years of Evidence Means for Your Practice

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Arkansas Association of Cancer Professionals

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Rhode Island Oncology Society

Houston Hematology Satellite Symposia

Ready for Radioligand Therapy? Patient Selection and Sequencing Simplified

Radioligand Therapy 101: The Science Behind the Strategy

AREDS3 and Beyond: The Scientific Basis for B Vitamin Nutritional Supplementation in AMD

Wisconsin Association of Hematology and Oncology

𝘔𝘌𝘛 Alterations in NSCLC: Applying Diagnostic Advances and Targeted Therapies in a New Era of Treatment

Tennessee Oncology Practice Society

Washington State Medical Oncology Society

Colorado Oncology Society

EyeCon 2026

27th Annual International Lung Cancer Congress®

Progress in Hyperlipidemia Management to Reduce ASCVD Risk: An Illustrated Update

Burst CME CGM: Continuous Glucose Monitoring Considerations – Maximizing Quality of Life for Patients

Minnesota Society of Clinical Oncology

North Carolina Oncology Association

Jersey City Psychiatry

26th Annual International Lung Cancer Congress

Enhancing Prostate Cancer Outcomes – The Role of PSMA and Targeted Treatment Strategies

(COPE Track) Beyond the Collarette: Empowering Patients in the Management of Demodex Blepharitis

(CME Track) Beyond the Collarette: Empowering Patients in the Management of Demodex Blepharitis

(CPE Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Arkansas

IgAN Case Files: Real Conversations, Evolving Evidence

(CPE Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – New York

Shining a Light on an Ultra-Rare Disease – A Closer Look at Thymidine Kinase 2 Deficiency (TK2d)

Identifying and Treating Generalized Myasthenia Gravis in the Modern Era

Addressing Unmet Needs for Patients With Spinal Muscular Atrophy—Understanding Patient Challenges and Management Approaches

Rewiring Recovery: Evidence-Based Approaches to Managing Chronic Inflammatory Demyelinating Polyneuropathy

Expert Illustrations & Commentaries™: Visualizing the Role of Dystrophin Dysregulation as a Therapeutic Target in Duchenne Muscular Dystrophy and MD STARnet

Navigating Ocular Toxicities: A Multidisciplinary Roadmap for Managing Adverse Events in Targeted Cancer Therapy

(CME Track) Antibody–Drug Conjugates in Oncology: The Essentials of AE Management for Better Patient Outcomes

(CPE Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Washington

Clinical Consultations™: Tailoring Treatment for Cystic Fibrosis (CF) Across Life Stages and Evolving Health Needs

(CPE Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – North Carolina

(CPE Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Montana/Wyoming

(CPE Track) Community Oncology Connections™: Leveraging Recent Advances in the Treatment of Relapsed/Refractory Follicular Lymphoma – Tennessee

A Shield of Protection: Unmet Needs in COVID-19 Prevention and Control

Putting the Patient First in Acute Pain Management: The PA’s Guide to Incorporating Cutting-Edge Science Into Their Treatment Strategies

Expert Illustrations & Commentaries™: Visualizing the Role of B Cells as Therapeutic Targets for Generalized Myasthenia Gravis

Personalized Approaches in NSCLC: Early Detection, Molecular Testing, and Targeted Therapies

Community Practice Connections™: DLL3-Targeting Bispecific Antibodies for Small Cell Lung Cancer—From Innovation to Practice