Background: Guidelines vary regarding the safety of administering intravenous immunoglobulin (IVIG) during infections, although evidence for this advice is lacking and is based on expert opinion.
Aims: We retrospectively studied patients with common variable immunodeficiency who reacted during IVIG therapy as to whether routinely obtained markers of infection such as C-reactive protein (CRP) were elevated.
Methods: 19 patients on replacement IVIG therapy in a hospital-based infusion unit were studied. CRP levels obtained were normalized to baseline levels without reactions (defined as 100).
Results: 8 of 19 patients had 16 reactions over a total of 107 infusions. Normalized CRP levels during reactions were higher [mean (±SD) of 258 (±215)] than during infusions with no reaction [mean 100 (±54.9), p = 0.017], and higher than in patients who did not react [mean 100 (±79.7), p = 0.017].
Conclusions: Some patients with IVIG reactions had elevated CRP levels suggesting that concurrent infection may have caused the reaction. Pre-emptive antibiotic therapy and delaying infusion could prevent unnecessary morbidity.