Use of Cocaine became regulated in 1906 by what act?

The Pure Food and Drug Act of 1906 was significant in regulating the use of substances, including cocaine, by requiring that food and pharmaceutical products be labeled accurately. This was a landmark piece of legislation aimed at ensuring that consumers were informed about the ingredients in the products they consumed and preventing deceitful marketing practices. Prior to this act, substances like cocaine were often not disclosed on product labels, which led to unsafe consumption practices.

The Pure Food and Drug Act specifically targeted misleading labeling and minimal safety standards in food and drug manufacturing. As a result, cocaine's presence in many over-the-counter products was brought under scrutiny, thus beginning the regulation of this drug in commercial products.

The other options represent different legislative contexts. The Controlled Substances Act came later, in 1970, and established a greater framework for drug scheduling. The Narcotic Act, while importantly regulating narcotics, also did not specifically lay down regulations for cocaine in a manner like the Pure Food and Drug Act did. The Food Safety Act, while related to food regulation, does not pertain to drug substances and thus is not applicable to the regulation of cocaine.