The Pure Food and Drug Act of 1906 was the first federal law to regulate the safety and honest labeling of food and medicine sold across state lines in the United States. Signed by President Theodore Roosevelt on June 30, 1906, it banned the interstate shipment of adulterated or misbranded food and drugs and gave the federal government its first real enforcement power over these industries.1U.S. Food and Drug Administration. Part I: The 1906 Food and Drugs Act and Its Enforcement Before it passed, manufacturers could add whatever chemicals they liked to food and could market opium-laced syrups as remedies for infants without disclosing a single ingredient.
The law was a turning point, but it was also a narrow one. It regulated what a label said and what a product contained, not whether the product worked or whether it was safe to swallow. Those gaps eventually killed people, and Congress had to replace the Act entirely in 1938.
What the Law Prohibited
The statute rested on two prohibitions: adulteration and misbranding. Together they defined what a manufacturer could put in a package and what the package could claim.
Food was considered adulterated if a substance had been mixed in to reduce its quality, if a valuable ingredient had been removed, if something had been added to hide damage, or if the product contained any poisonous or harmful ingredient that could injure health. Filthy or decomposed substances counted too.1U.S. Food and Drug Administration. Part I: The 1906 Food and Drugs Act and Its Enforcement A frequently cited example was green cherries bleached with acid and then dyed with poisonous aniline coloring to look ripe.2U.S. Capitol Visitor Center. The Pure Food and Drug Act Common fraud tactics like watering down milk or bulking up ground spices with sawdust or clay fell squarely within the ban.
A product was misbranded if its label carried any false or misleading statement about what was inside or where it came from.3GovInfo. Fifty-Ninth Congress, Session I, Chapter 3915, 1906 Passing off a domestic product as an imported one counted, as did selling one product under another product’s name. If the weight or measure was stated, it had to be accurate.
The Ingredient Disclosure Rule That Changed Patent Medicines
The most consequential piece of the misbranding rules applied to drugs. Any label had to disclose the presence and quantity of eleven specific substances, along with any derivative or preparation of them:
- Alcohol
- Morphine
- Opium
- Cocaine
- Heroin
- Alpha eucaine
- Beta eucaine
- Chloroform
- Cannabis indica
- Chloral hydrate
- Acetanilide
Any derivative or preparation of those substances also had to be listed.3GovInfo. Fifty-Ninth Congress, Session I, Chapter 3915, 1906 Before the Act, a bottle of “soothing syrup” marketed for infants could contain morphine without any mention of it on the label. After the Act, manufacturers could still sell products containing these substances, but they could no longer hide the contents from buyers.
Drug purity was handled by reference to two existing publications. The Act recognized the United States Pharmacopoeia and the National Formulary as the official standards. Any drug sold under a name listed in either had to meet the strength, quality, and purity described there. A manufacturer could sell a version that deviated, but only if the label plainly stated how.1U.S. Food and Drug Administration. Part I: The 1906 Food and Drugs Act and Its Enforcement
What the Law Did Not Do
The Act’s limits are as important as its rules, because they explain most of what went wrong later.
It did not require any drug to be proven safe before it went on sale. There was no pre-market testing and no government approval process. A manufacturer could put a new product on the shelf tomorrow, and the government could act only after somebody was harmed.
It did not require drugs to be effective. A useless remedy was legal as long as its label listed ingredients accurately and met purity standards. It did not initially address false claims about what a medicine could cure either. In United States v. Johnson (1911), the Supreme Court held that the misbranding provisions targeted false statements about a product’s identity and ingredients, not false claims about its therapeutic effects.4Justia. United States v. Johnson
It drew no line between prescription and over-the-counter medicines. That federal distinction did not exist until the Durham-Humphrey Amendment of 1951.5U.S. Food and Drug Administration. Milestones in U.S. Food and Drug Law
And it did not authorize the government to define what common foods had to contain. Early drafts had given the Department of Agriculture power to set official standards for foods like jam or butter, but food industry lobbying stripped that language out. The result was a distinctive-name loophole: a fruit spread that was only 20 percent fruit could be sold under a made-up brand name, because it never claimed to be jam. Courts sided with manufacturers who argued that selling a cheap imitation was not the same as making a false statement. Congress later called the absence of official food standards “one great weakness” of the 1906 law.6EveryCRSReport.com. Legal Issues Associated with FDA Standards of Identity: In Brief
How the Law Was Enforced
Enforcement fell to the Bureau of Chemistry, a division of the U.S. Department of Agriculture led by chief chemist Harvey Washington Wiley, whose earlier “Poison Squad” experiments on food preservatives had made him a public figure associated with food safety.7U.S. Food and Drug Administration. Harvey Washington Wiley Bureau agents collected and tested product samples. When they found a violation, the Secretary of Agriculture notified the responsible party, offered a hearing, and then referred the case for prosecution if warranted.1U.S. Food and Drug Administration. Part I: The 1906 Food and Drugs Act and Its Enforcement
The government had two tools. It could seize adulterated or misbranded products found in interstate commerce through a court proceeding. And it could bring criminal charges. Violations were misdemeanors, with a fine of up to $200 for a first offense and up to $300 or one year in prison for repeat offenses.3GovInfo. Fifty-Ninth Congress, Session I, Chapter 3915, 1906 Court injunctions were not available; that power came with the 1938 replacement law.5U.S. Food and Drug Administration. Milestones in U.S. Food and Drug Law
One practical protection was the guaranty clause. A retailer could avoid prosecution by producing a written guarantee from the manufacturer or wholesaler stating that the product complied with the Act. This shifted legal risk to the party that actually made or distributed the product and spared shopkeepers who had no way to test what they sold.
Sherley Amendment and the 1937 Disaster
Congress tried to close the therapeutic-claims gap left by Johnson with the Sherley Amendment of 1912, which made it illegal to label a medicine with false therapeutic claims intended to defraud the buyer.8U.S. Food and Drug Administration. Promoting Safe and Effective Drugs for 100 Years The catch was the intent requirement. Prosecutors had to prove the manufacturer meant to deceive, not just that the claim was false, and many cases collapsed on that point.
The safety gap remained untouched for three decades. In September 1937, a Tennessee pharmaceutical company sold a liquid form of the antibiotic sulfanilamide dissolved in diethylene glycol, a chemical normally used as antifreeze. The company ran no toxicity tests. Within weeks, more than 100 people in 15 states died, many of them children. FDA investigators could only prosecute the company for misbranding, because the product had been called an “elixir,” a term implying an alcohol-based solution, and it contained no alcohol. Selling an untested drug that killed people was not, by itself, illegal.9U.S. Food and Drug Administration. The Sulfanilamide Disaster
Congress passed the Federal Food, Drug, and Cosmetic Act of 1938 the following year, replacing the 1906 law entirely. The new statute required manufacturers to prove a drug was safe before selling it, authorized the FDA to set food standards of identity, extended regulation to cosmetics and medical devices, dropped the Sherley Amendment’s intent-to-defraud requirement for false therapeutic claims, and gave the government the power to seek court injunctions.5U.S. Food and Drug Administration. Milestones in U.S. Food and Drug Law The 1906 Act is no longer on the books, but the framework it introduced, federal oversight of food and drug safety through labeling rules and enforcement powers, remains the foundation of the system that governs these industries today.