Immunopharmacology is the 11th volume of the proceedings of the Third International Pharmacological Meeting held at Sao Paulo, Brazil on July 26, 1966. The volume covers papers that deal with immunoglobulins responsible for hypersensitivity reactions and with the mechanisms of these reactions; pharmacological mediators of immediate and delayed hypersensitivity; Arthus reactions; and soluble factors released by the action of antigen on sensitized lymphocytes. The book concludes with a single paper on the subject of penicillin allergy. Immunologists and pharmacologists will find the volume invaluable.