Antifebrine as a proprietary name is controlled by patents, and when
bought under this name it costs about thirty cents per ounce. The name
acetanilide, for exactly the same substance, is not and cannot be
controlled in any way, and under this name it can be bought for about
fifteen cents per ounce. As acetanilide is about one-eighth the price of
antipyrine, and effective in half the dose, it is far more economical to
the patient.—_Pittsburgh Medical Review._