by which mechanism allergic reactions produces by antibiotics can be associated with immune system? either it is cascaded by macrophages or mast cells? i need guidance about cell wall synthesis inhibitors antibiotics allergic reactions? These are some hypersensitivity & AD reactions like anaphylactoid reactions, including hypotension,, wheezing, dyspnea, urticaria, flushing of upper body (red neck), pruritus, pain and muscle spasm of the chest and back. I need the basic mechanism pathways? Please guide