Rapid subcutaneous desensitization for the management of delayed hypersensitivity reactions to omalizumab：A case report

What is known and objective Omalizumab is effective as an add-on drug to treat severe persistent allergic asthma. However, delayed hypersensitivity reactions to omalizumab may deprive patients of its use. Rapid subcutaneous desensitization could be a solution. Case description A 61-year-old man developed a delayed allergy to omalizumab after the first injection. A 14-step desensitization procedure was applied to the patient and was successful. What is new and conclusion Delayed hypersensitivity reactions to omalizumab are rare, but they may cause the interruption of drug usage. Desensitization to omalizumab could be a possible solution.