Pathology General f5b3caa0 Function of IL-4 is - A Inhibiting IL-1 B Chemotaxis C Vasodilatation D Inhibiting macrophages High-Yield Explanation Ans is 'a' i.e. Inhibiting IL-1 [Ref Principles of Cancer Biotherapy p.1731"In monocytes, IL-4 inhibits IL-1, TNF-alpha and IL-6." - Principles of Cancer Biotherapy p.173.