Can Epinephrine Coated Syringe for Subcutaneous Immunotherapy (SCIT) Reduce Large Local Reaction?

Injection Reactions Site Clinical Trial

Official title:

Can Epinephrine Coated Syringe for Subcutaneous Immunotherapy (SCIT) Reduce Large Local Reaction?

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03963115
• Other study ID #: 393/2561(EC3)
• Status: Completed
• Phase: Phase 1/Phase 2
• Start date: October 24, 2018
• Est. completion date: September 1, 2019

Study information

• Verified date: February 2020
• Source: Mahidol University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Allergen immunotherapy is effective in the management of allergic asthma, allergic rhinitis/conjunctivitis, and stinging insect hypersensitivity. The most common side effect of subcutaneous allergen specific immunotherapy (SCIT) is local reactions (LR). Although some studies indicated that LR did not predict systemic reaction (SR), patients with higher frequency of large local reaction (LLR) were reported to have higher risk for SR. Epinephrine may decrease LLR due to its vasoconstrictive effect . The objective of this study was to compare the size of LLR in patients receiving SCIT with epinephrine or normal saline coated syringe. The patients who complained of frequent LLR despite pre-medication and local treatment were recruited.

Description:

Allergen immunotherapy (AIT) is an immune mediated treatment which modifies T helper (Th) 2-directed response through the interplay between regulatory T and B cells, blocking IgG4 antibodies and tissue effector-mediated mechanisms. Aeroallergen immunotherapy is recommended for patients with allergic rhinitis, allergic conjunctivitis or allergic asthma whose symptoms were not adequately controlled by antigen avoidance and pharmacotherapy. AIT could reduce symptoms and medication usage in respiratory allergy. In children, AIT prevented the progression from allergic rhinitis to asthma and prevented new onset of allergen sensitization in monosensitized patients. The administration of allergen by subcutaneous injection (SCIT) is a common practice among allergists.

The benefits of SCIT must be weighed against the risks of side effects which can be mild or life threatening. Adverse allergic reactions to SCIT were classified as either local (LR) or systemic reactions (SR).6 Large local reactions (LLR) are defined as erythema and/or swelling (> 25 mm) at the site of injection. The timing of adverse reactions were categorized into immediate (occurring within 30 min) and late reactions (occurring > 30 min after injection). LR associated with SCIT ranged from 26-72% of patients and 0.7-4% of injections. SR were reported to occurred in 3.7% of patients and 0.3% of injection. Recent prospective study in pediatric patients who received SCIT showed immediate LR in 54.6%, delayed LR in 56.1%, immediate SR in 2.2% and delayed SR in 7.4% of the patients. Severe SR were seen in 0.03% of all treatments which appeared within 30 minutes after the injections. The author concluded that children had similar rates of LR compared to adult patients but had lower rates of severe SR.

Several studies indicated that individual LR did not predict subsequent SR. The rate of SR were not change despite the dose adjustment after a LR. However, patients with greater frequency of LLR might be at an increased risk for future SR. Recognizing the significance of frequent LLRs is important for designing safer protocols for successful SCIT.

In the Division of Allergy and Clinical Immunology, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, we performed SCIT in approximately 100 patients and 2000 injections per year. The LR associated SCIT were complained in 75% of the patients. Of the patients who experienced LR, 80% had LR more than 25 mm which was considered LLR.

Many strategies to prevent or minimize LR were reported. Oral antihistamines, leukotriene receptor antagonist (LTRA) or anti-IgE could reduce LR during the built-up phase. Cold compression or topical steroid were used to reduce the LR without any strong evidence. To our knowledge, the benefit of epinephrine coated syringe prior to drawing the allergen extract for SCIT in patients with frequent LLR has never been explored in any controlled trial.

The objective of this study is to compare the size of LR in patients with frequent LLR who receive SCIT by coating syringe with epinephrine or placebo prior to drawing allergen extract.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 17
• Est. completion date: September 1, 2019
• Est. primary completion date: August 25, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 6 Years to 40 Years

Eligibility

Inclusion Criteria:

• Patients older than 6 years old who received SCIT at Pediatrics allergy departments at Siriraj hospital

• Patients who develops larges local reactions(mean wheal diameter > 25 mm.) during SCIT.

• Patients who received SCIT in maintenance phase.

Exclusion Criteria:

• Patients who develops systemic reactions (more than grade 1) during SCIT.

Related Conditions & MeSH terms

• Injection Reactions Site
• Injection Site Reaction
• Systemic Reactions

Intervention

Drug:
• Epinephrine or normal saline
epinephreine or normal saline coated syringe before drawing allergen for injection.

Locations

Country	Name	City	State
Thailand	Orathai Piboonpocanun	Bangkok

Sponsors (1)

Lead Sponsor	Collaborator
Mahidol University

Country where clinical trial is conducted

Thailand, 

References & Publications (2)

Calabria CW, Stolfi A, Tankersley MS. The REPEAT study: recognizing and evaluating periodic local reactions in allergen immunotherapy and associated systemic reactions. Ann Allergy Asthma Immunol. 2011 Jan;106(1):49-53. doi: 10.1016/j.anai.2010.10.025. — View Citation

Roy SR, Sigmon JR, Olivier J, Moffitt JE, Brown DA, Marshall GD. Increased frequency of large local reactions among systemic reactors during subcutaneous allergen immunotherapy. Ann Allergy Asthma Immunol. 2007 Jul;99(1):82-6. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Epinephrine coated syringe for SCIT changed sized of large local reactions compared with placebo	We measured the sized of local reactions after injected SCIT coated with epinephrine or placebo for 30 minutes at clinic then 2 hours, 4 hours and 6 hours at home.	30 minutes, 2 hours, 4 hours, 6 hours
Secondary	Epinephrine coated syringe for SCIT changed systemic reactions compared with placebo.	We measured the systemic reactions after injected SCIT coated with epinephrine or placebo for 30 minutes at clinic then 2 hours, 4 hours and 6 hours at home.	30 minutes, 2 hours, 4 hours, 6 hours