Adverse reactions to venom immunotherapy

Area of Science:

• Allergy and Immunology
• Toxicology

Background:

• Systemic hypersensitivity to hymenoptera stings poses significant health risks.
• Traditional venom immunotherapy aims to desensitize patients but can cause adverse reactions.

Purpose of the Study:

• To evaluate the efficacy and safety of adjusting venom immunotherapy dosage based on local reactions.
• To determine if this modified approach reduces systemic reactions during venom immunotherapy.

Main Methods:

• Twenty-two adult patients with a history of systemic hypersensitivity to hymenoptera venom underwent immunotherapy.
• Immunological response was monitored via venom-specific IgE and IgG levels.
• Dosage adjustments were made based on the severity of local reactions to venom injections.
• A subset of patients underwent an in-hospital insect sting challenge.

Main Results:

• Patients showed an increase in venom-specific IgE and IgG, indicating an immunological response.
• Fifty percent of patients experienced large local reactions initially, necessitating dose adjustments.
• No systemic reactions were observed during venom therapy with the adjusted dosage approach.
• Twelve patients tolerated an in-hospital insect sting challenge without adverse events.

Conclusions:

• Adjusting venom immunotherapy dosage in proportion to local reactions is a safe and effective strategy.
• This method significantly reduces the risk of systemic reactions during hymenoptera venom immunotherapy.
• The modified approach maintains treatment efficacy while improving patient safety.