Loco Weed: How Fear, Racism, and Misinformation Shaped Cannabis Prohibition (1910–1920)

Long before the propaganda film Reefer Madness terrified American audiences in the 1930s, the foundation for cannabis prohibition was already being laid. Between 1910 and 1920, cannabis became the target of a fear-based narrative that labeled it “loco weed” — a term meant to suggest madness, violence, and moral collapse. This era marks a critical turning point in how cannabis was portrayed, regulated, and ultimately criminalized.

Understanding this history matters, because the myths created then still echo in modern policy, policing, and public perception today.

The Birth of the “Loco Weed” Myth

“Loco weed,” a Spanish-derived phrase meaning “crazy weed,” was used by newspapers and officials to sensationalize cannabis use. Stories exaggerated its effects, claiming it caused insanity, aggression, and criminal behavior. These claims were rarely backed by science. Instead, they relied on fear, anecdote, and cultural prejudice.

Cannabis became associated with immigrants, Black and Brown communities, and working-class people — a tactic that made it easier to justify regulation and punishment. The plant itself wasn’t the real target. Control was.

Medicine to Menace — A Manufactured Shift

Ironically, during this same period, cannabis was still widely used in American medicine. It appeared in tinctures, pain remedies, and pharmaceutical products sold legally by respected companies. Hemp was also cultivated for industrial uses, including rope, textiles, and paper.

So what changed?

One major factor was the 1910 Flexner Report, which reshaped American medical education. While it modernized certain standards, it also led to the closure of many herbalist and plant-based medical schools. As a result, cannabis — once a common medicine — lost legitimacy in mainstream healthcare, making it easier to reframe as a dangerous drug rather than a therapeutic plant.

Fear Before the Law

What’s important to understand is that prohibition didn’t start with laws — it started with stories.

The public was primed to fear cannabis decades before it was federally banned. Sensational headlines, racialized narratives, and moral panic created an environment where prohibition felt “necessary,” even though evidence didn’t support the claims being made.

This same strategy has been repeated throughout history: distort the truth, target marginalized groups, and legislate fear.

Why This History Still Matters

Today, as legalization expands and cannabis re-enters mainstream culture, it’s easy to forget how intentional its criminalization was. The damage caused by these early myths led to decades of mass incarceration, lost economic opportunity, and cultural erasure — especially in Black and Brown communities.

At Elevated Club NYC, we believe education is elevation. Cannabis isn’t new. What’s new is the honesty returning to the conversation.

Understanding where the lies began helps us build a future rooted in truth, equity, and respect for the plant and the people connected to it.

History isn’t just something we read — it’s something we’re still undoing.

— Justice

Elevated Club NYC