Evaluation of Intralymphatic Immunotherapy in Allergic Rhinitis Patients: A Systematic Review and Meta-analysis.

Thirteen studies (454 participants) were included in this study. The ILIT group had better clinical improvement on the CSMS (random effects model, SMD-0.85, 95% CI [-1.58, -0.11], = 0.02) and RQLQ (fixed-effects model, MD-0.42, 95% CI [0.69, 0.15], = 0.003) than the placebo group. The booster injection was beneficial for CSMS ( < 0.0001), and the 4-week injection interval was superior to the 2-week injection period for improving VAS ( < 0.0001). Local swelling or erythema was the main AE following injection (random effects model, RD 0.16, 95% CI [0.05, 0.27], = 0.005). . For individuals with AR, ILIT is safe and effective. ILIT alleviates clinical symptoms and reduces pharmaceutical consumption without causing severe AEs. However, the validity of this study is compromised by the substantial heterogeneity and risk of bias in the included researches. CRD42022355329.