Drug charges in Canada are governed primarily by the Controlled Drugs and Substances Act (CDSA). These are serious federal offences — even a possession charge can result in a criminal record with lasting consequences for employment, travel, and immigration. Understanding the charges and the available defences is essential.

How the CDSA Classifies Substances

The CDSA organizes controlled substances into Schedules. The Schedule a substance falls under determines the severity of the available penalties:

The Main Offences

Simple Possession (s. 4 CDSA)

Possession means having knowledge and control of a controlled substance for personal use. The Crown must prove you knew what the substance was and that it was a controlled drug. For Schedule I substances (cocaine, heroin, fentanyl), simple possession carries a maximum of 7 years imprisonment on indictment. The Crown can also proceed by summary conviction for lower-level cases.

Note that cannabis possession is now legal in Canada up to 30 grams of dried cannabis for adults — but possession above that amount, or possession of any amount by a minor, remains a criminal offence.

Possession for the Purpose of Trafficking (s. 5(2) CDSA)

The Crown does not need to catch you in the act of selling drugs. “Possession for the purpose of trafficking” is proven circumstantially — through the quantity of drugs seized, the presence of scales, baggies, large amounts of cash, multiple cell phones, or the absence of paraphernalia associated with personal use. For Schedule I substances, the maximum is life imprisonment.

Trafficking (s. 5(1) CDSA)

Trafficking includes selling, administering, giving, transferring, transporting, sending, or delivering a controlled substance. Crucially, no money needs to change hands — giving drugs to a friend constitutes trafficking. Maximum penalties match those for possession for the purpose of trafficking.

Production (s. 7 CDSA)

Producing a controlled substance — including growing cannabis above legal limits, manufacturing methamphetamine, or synthesizing MDMA — carries a maximum of life imprisonment for Schedule I and II substances.

Importing and Exporting (s. 6 CDSA)

Importing or exporting controlled substances is punishable by up to life imprisonment for Schedule I substances. Mandatory minimum sentences that previously applied to this offence were repealed by Parliament in 2022.

Charter Defences in Drug Cases

Drug prosecutions are highly vulnerable to Charter challenges because the evidence — the drugs themselves — is almost always obtained through police searches. A skilled defence lawyer will scrutinize:

• Search warrant validity (s. 8 Charter): Was there an informant? Was the informant reliable? Did the Information to Obtain (ITO) the warrant contain sufficient grounds? Challenging a search warrant can result in all evidence obtained being excluded.
• Warrantless searches: Was the search a lawful search incident to arrest, or did police exceed the scope of a lawful arrest? Warrantless searches of homes are presumptively unreasonable.
• Investigative detention (s. 9 Charter): Was the traffic stop or street detention lawful? Arbitrary detention is prohibited, and evidence gathered after an unlawful detention may be excluded.
• Right to counsel (s. 10(b) Charter): Were you promptly informed of your right to a lawyer? Were you given a reasonable opportunity to retain one before questioning?
• Wiretap and surveillance authorization: Were electronic intercepts properly authorized? Were the authorizations obtained on accurate information?

This article is for general informational purposes only and does not constitute legal advice. Criminal law is fact-specific — contact a lawyer to discuss your situation.