Medical Cannabis Advocacy in Canada During the 1920s

Context: cannabis was barely on Canada's radar

Before the 1920s, cannabis in Canada existed almost entirely as a minor pharmaceutical ingredient. Tinctures of Cannabis indica appeared in Canadian and British pharmacopoeias from the late 19th century, prescribed for sleep, pain, and menstrual cramps, but use was small compared to opiates ^[1] Strong evidence. Recreational cannabis use was effectively absent from Canadian public life in the early 1920s — there is no documented street market, no newspaper panic, and no recorded medical association resolutions on the drug from that period ^[2] Strong evidence.

This matters because it sets up the central puzzle of the decade: Canada criminalized cannabis in 1923 without any visible domestic problem to solve, and therefore without any organized advocacy — medical or otherwise — for or against the move.

The 1923 amendment: prohibition by quiet schedule entry

On 23 April 1923, Parliament passed amendments to the Act to Prohibit the Improper Use of Opium and Other Drugs. Buried in the new schedule of restricted drugs, alongside heroin and codeine, was a new entry: 'Cannabis Indica (Indian Hemp) or Hasheesh' ^[3] Strong evidence.

The historical record from Hansard shows the bill's sponsor, Minister of Health Henri Béland, introducing the schedule changes without commenting on cannabis specifically. There was no debate, no testimony from physicians, and no press coverage attached to the cannabis line ^[3] Strong evidence. Historian Catharine Carstairs, who has examined the Hansard record and Department of Health files most thoroughly, concludes that the addition was essentially administrative — Canada was harmonizing its schedule with emerging international drug control language ^[2][4] Strong evidence.

The popular claim that the 1923 ban was driven by Emily Murphy's 1922 book The Black Candle — which contained a lurid chapter on 'marahuana' — is overstated. Murphy's book influenced public attitudes toward Asian immigrants and opium far more than it shaped cannabis policy, and the timing suggests her chapter reflected, rather than caused, the bureaucratic decision already underway ^[2][5] Disputed.

Was there any medical advocacy at all?

Short answer: no organized advocacy has been documented Strong evidence.

The Canadian Medical Association journals of the early 1920s contain occasional clinical notes on cannabis tinctures but no editorials defending or opposing scheduling ^[1] Weak / limited. Pharmacists retained the right to dispense cannabis preparations on prescription after 1923 — the drug was restricted, not banned outright for medical use — which removed any urgent reason for the medical profession to push back ^[3] Strong evidence.

The people who did engage with federal drug policy in this period were temperance activists, anti-opium campaigners, and a small group of senior civil servants — most notably Colonel C.H.L. Sharman, who would lead the federal Narcotic Division from 1927 and represent Canada at League of Nations drug conferences. Sharman was a prohibitionist by disposition, and his correspondence shows he viewed cannabis as a foreign problem to be controlled internationally rather than a domestic patient-care issue ^[4][6] Strong evidence.

How the myth of '1920s advocacy' developed

Modern cannabis-reform writing sometimes implies that 1920s Canadian doctors or patients fought the ban. This appears to be a back-projection from the much better-documented activism of the 1960s–1990s, particularly around the Le Dain Commission (1969–1972) and later medical access litigation like R. v. Parker (2000) ^[7] Strong evidence.

A second myth is that The Black Candle single-handedly caused the ban. This was popularized by journalist Allan Fotheringham and later repeated in countless documentaries. Carstairs, Giffen, Endicott, and Lambert's archival work shows the policy was driven more by international treaty alignment and quiet bureaucratic momentum than by Murphy's racist potboiler ^[2][5] Strong evidence.

The accurate 1920s story is dull, and that's why it gets rewritten: a sentence was added to a schedule, nobody objected, and almost nobody used cannabis in Canada anyway. The first cannabis possession conviction in Canada was not recorded until 1937 — fourteen years after the ban ^[2] Strong evidence.

What to take away

If you're researching Canadian cannabis history, treat the 1920s as the prehistory of advocacy, not its first chapter. The meaningful Canadian medical cannabis movement begins in the 1970s with the Le Dain Commission and accelerates in the late 1990s with constitutional challenges that produced the Marihuana Medical Access Regulations in 2001.

The 1920s lesson is a useful one for drug policy generally: laws can be made without debate, without evidence, and without affected parties at the table — and once on the books, they shape a century of policy by inertia.

Sources

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