Adverse drug reactions following lymphocyte immunotherapy for the treatment of infertility: A retrospective study

Abstract Aim Unexplained infertility is a major burden for couples who want to have children. Lymphocyte immunotherapy (LIT) could be a therapeutic help for these couples. Although LIT has been carried out for decades, the data on the success of therapy are still controversial and there is hardly information on possible adverse drug reactions. Methods In this study, we used a questionnaire to determine the frequency of local and systemic adverse drug reactions in our patients who were treated with LIT between 2017 and 2020 ( n = 302). In addition, we asked about pregnancies and/or live births after LIT in a 2‐year follow‐up ( n = 140). Results Most of the patients reported the occurrence of mild local adverse drug reactions in a period of less than 4 weeks: Over 75% reported moderate erythema, itching or swelling, over 10% erythema, itching or swelling as more pronounced adverse drug reaction. Blistering was specified in 10% of the cases. Serious adverse drug reactions or adverse events were not described. In the follow‐up, 69% of our patients stated a pregnancy after LIT, and 50% a life birth. Conclusions Overall, LIT represents a well‐tolerated therapy for couples with unexplained infertility, however, more evidence is needed on the benefits.