From Folklore to Pharmacy The Evolution of Cannabis Medicine

Cannabis has traversed a complex journey in the United States, evolving from a widely accepted medicinal herb to a prohibited substance, and now, in recent years, to a focal point of medical and recreational legalization. This transformation reflects changing societal attitudes, scientific research, and policy decisions.

Early Use and Medical Recognition

The medicinal use of cannabis dates back thousands of years, with early records from ancient China, India, and Egypt. In the 19th century, Irish physician William Brooke O’Shaughnessy introduced cannabis to Western medicine after observing its therapeutic effects in India. He documented its efficacy in treating various ailments, including pain and convulsions. By 1850, cannabis was included in the United States Pharmacopeia, recognized for its medicinal properties. (pubmed.ncbi.nlm.nih.gov)

Criminalization and the War on Drugs

The early 20th century saw a shift in perception. In 1937, the Marihuana Tax Act effectively prohibited cannabis, marking the beginning of its criminalization in the U.S. This trend intensified during the War on Drugs in the 1980s, leading to stringent laws and a significant decline in medical cannabis use. (en.wikipedia.org)

Renewed Interest and Legalization Movements

The late 20th century witnessed a resurgence in interest. In 1996, California became the first state to legalize medical cannabis through Proposition 215, allowing patients with a physician’s recommendation to use cannabis for various medical conditions. This landmark decision paved the way for other states to follow suit. (en.wikipedia.org)

By 2023, 38 states, along with the District of Columbia, had established medical cannabis programs. Additionally, 24 states and D.C. had legalized recreational use, reflecting a significant shift in public opinion and policy. (time.com)

Federal Policy and Rescheduling Efforts

Despite state-level legalization, cannabis remained classified as a Schedule I substance under the Controlled Substances Act, indicating a high potential for abuse and no accepted medical use. This federal stance created a dichotomy between state and federal laws. In August 2023, the U.S. Department of Health and Human Services (HHS) recommended reclassifying cannabis to Schedule III, acknowledging its medical potential and lower abuse risk. This recommendation was a pivotal moment in federal drug policy, aiming to align federal regulations with the evolving state laws. (americanbar.org)

Current Landscape and Future Directions

As of June 2025, the landscape of cannabis medicine in the U.S. continues to evolve. The reclassification to Schedule III has facilitated increased research into cannabis’s therapeutic applications, leading to a better understanding of its benefits and risks. However, challenges persist, including navigating the complex interplay between state and federal regulations and addressing public health concerns related to cannabis use.

The journey of cannabis medicine in the United States underscores a dynamic interplay between cultural perceptions, scientific inquiry, and policy decisions. From its ancient medicinal use to its criminalization and subsequent legalization, cannabis’s path reflects broader societal shifts and the ongoing quest for evidence-based medical practices.

Recent Developments in U.S. Cannabis Policy:

• Where Marijuana Laws Stand in the U.S. as Biden Pardons Thousands
• As the US moves to reclassify marijuana as a less dangerous drug, could more states legalize it?
• Biden gives cannabis industry a badly needed win