Summary

Joseph McKenna United States v. Antikamnia Chemical Company…

It is not necessary to enter upon the challenged ground. The law furnishes its own tests of what the labels should reveal, and we may grant, for the argument's sake, as contended, that it has penal character; but this does not mean that it should not be given its reasonable intendment. There is no hardship in this, either to the manufacturer or the seller of drugs. They surely know what they make or vend,-know whether it is primary or of what a derivative, and the law requires only that they put their knowledge on the labels for the information of purchasers.
Source: Wikisource

Joseph McKenna United States v. Antikamnia Chemical Company…

But let us turn from the power of the Secretaries to the law itself, and inquire if it needs the assistance of a regulation. It is the contention of the government that it does not, that its requirement that the primary substances should be labeled and that their derivatives should be labeled means, necessarily, that it should be stated of what they are the derivatives to make the warning of the labels complete.
Source: Wikisource

Joseph McKenna United States v. Antikamnia Chemical Company…

The query then occurs, such being the words and purpose, if the quantity or proportion of the substances or any derivative or preparation of them must be stated, is it administrative of the law or additive to it to require by regulation that not only the name of the derivative or preparation be stated, but from what substance derived or of what it is a preparation? It certainly cannot be said that the purpose of the law is not exactly fulfilled by the regulation.
Source: Wikisource

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