“…The objection that all itching drug hypersensitivity reactions are not associated with a triple response can be met, as it seems that the release of sufficient histamine in the epidermis to cause severe itching may not be accompanied by a triple response, which is a dermal reaction. This view, which is in opposition to the contention of Rothman (1941) that itching without visible changes in the skin cannot be due to histamine, is strengthened by many reports that orally administered antihistamine drugs have some effect in relieving the pruritus of such conditions as eczema, prickly heat, chickenpox rashes, mosquito bites, the dermatitis of poison ivy, pruritus ani and vulvae (of uncertain aetiology), and pruritus associated with Hodgkin's disease, and obstructive jaundice (Baer and Sulzberger, 1946;Blumenthal and Rosenberg, 1947;Davis, 1950;Feinberg, 1950;Friedlaender and Feinberg, 1946;Gordon and Crewe, 1948;Hunter and Dunlop, 1948;Kuhn, 1949;Lynch, 1947;Silverman, 1949;Waldbott, 1946;and Waldriff, Davis, and Lewis, 1950). In many instances improvement in the pruritus leaves the rash unchanged.…”