Heroin has been around for about 150 years. A British chemist first synthesized it in 1874, and it was sold commercially as a medicine by the late 1890s. Its journey from laboratory creation to global prohibition happened remarkably fast, spanning just a few decades.
From Opium to Morphine to Heroin
Heroin’s story starts long before 1874. Opium, harvested from poppy plants, had been used for pain relief and recreation for thousands of years. In 1803, a German pharmacist named Friedrich Sertürner isolated morphine from opium, creating a far more potent painkiller. Morphine became widely used in medicine throughout the 1800s, but its powerfully addictive nature was well known, especially after the American Civil War left thousands of soldiers dependent on it.
The search for a non-addictive alternative to morphine led British chemist C.R. Alder Wright to chemically alter morphine in his London laboratory in 1874. The result was diacetylmorphine, the compound we now call heroin. Wright hoped he had created something that could relieve pain without the addiction risk. He hadn’t.
Bayer’s “Wonder Drug”
Wright’s creation sat largely ignored for over two decades. Then, in 1898, the German pharmaceutical company Bayer began selling diacetylmorphine commercially under the brand name “Heroin.” Bayer marketed it as a pain reliever and cough suppressant, positioning it as a safer substitute for morphine. The drug was sold over the counter in many countries and prescribed freely by doctors. It was even marketed for children’s coughs.
The optimism didn’t last. Doctors and patients quickly discovered that heroin was even more addictive than the morphine it was supposed to replace. The drug converts rapidly to morphine in the brain but crosses the blood-brain barrier faster, producing a more intense rush. By 1913, just 15 years after launching the product, Bayer stopped producing it.
The Rise of Addiction and Early Regulation
By the time of World War I, widespread use of morphine, heroin, opium, and cocaine in the United States had created growing public alarm about drug addiction. Heroin had moved beyond medicine cabinets and into recreational use, and the scale of the problem was becoming impossible to ignore.
The U.S. government responded in stages. The Harrison Narcotics Tax Act of 1914 was the first major federal law targeting opiates, requiring registration and taxes for anyone manufacturing or distributing them and sharply limiting what doctors could prescribe. In 1922, Congress passed the Narcotic Drugs Import and Export Act, tightening restrictions on the international drug trade and cracking down on unauthorized possession. Then in 1924, Congress outlawed heroin altogether, banning all manufacture and use in the United States, including medical use.
International Bans Followed Quickly
The United States wasn’t acting alone. On February 19, 1925, the Geneva Opium Convention was signed, establishing an international framework to control the production and distribution of addictive drugs. This treaty updated an earlier 1912 agreement from The Hague and created much narrower oversight at every stage, from manufacturing to distribution. Heroin was among the substances brought under tight international control, and most countries followed with their own restrictions over the following decades.
In less than 30 years, heroin had gone from a branded pharmaceutical product sold over the counter to a substance banned or heavily restricted across much of the world.
Where Heroin Stands Today
In the United States, heroin remains completely illegal with no accepted medical use. But the picture is different in parts of Europe and Canada. Pharmaceutical-grade heroin (called diamorphine in medical settings) is currently prescribed in Switzerland, Denmark, Germany, Luxembourg, the Netherlands, the United Kingdom, and Canada. In these countries, it’s used strictly to treat people with severe opioid addiction who haven’t responded to other treatments, administered under direct medical supervision.
The UK is unique in that it also uses pharmaceutical heroin for severe pain, including pain from surgery, heart attacks, and terminal illness. Everywhere else that permits it, the drug is reserved solely for addiction treatment programs.
So heroin has existed for just over 150 years. For the first 50 of those years, it traveled from a hopeful laboratory experiment to a commercial medicine to a global public health crisis. The century since has been defined by prohibition, underground markets, and recurring waves of addiction that continue to shape drug policy worldwide.