Abstract: A method of neutralizing adverse biological effects of Interleukin 6 (IL-6) and other pro-inflammatory Interleukins in vivo is disclosed using homogeneous solutions of hypohalous acids to modify binding sites on cytokines and chemokines that are responsible for activation of cell surface receptors, and the initiation of harmful inflammatory processes or the growth of cytokine-dependent malignancies or of malignancies dependent on other chemical growth factors.