“…It is known that nasal insufflation of 'pituitary snuff' (acetone-dried posterior pituitary tissue) can result in the production of antibodies to its protein constituents (Pepys, Jenkins, Lachman & Mahon, 1965;Mahon, Scott, Ansell, Manson & Fraser, 1967). However, when more purified preparations are used, hypersensitivity reactions are uncommon.…”