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.
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Epinephrine coated syringe for SCIT changed sized of large local reactions compared with placebo
Timeframe: 30 minutes, 2 hours, 4 hours, 6 hours