A woman in her fifties stood at the dispensary counter in Fargo last winter, holding a menu card in both hands like it might clarify itself if she gripped it firmly enough. Chronic lower back pain, doctor-approved for the medical cannabis program, wanting something for sleep. "Should I get indica or sativa?" she asked.
The budtender said indica. Indica for sleep, sativa for energy. It's the answer you'll hear in nearly every dispensary in North Dakota. It is not wrong, exactly. But it is so incomplete that it borders on misleading — like telling someone choosing a medication, "The blue ones calm you down and the red ones pep you up."
I spent thirty-three years in pharmaceutical quality control. The indica/sativa distinction is an approximate answer. A precise one exists. Most patients just never hear it.
Where the Categories Came From
The terms indica and sativa are botanical in origin. Jean-Baptiste Lamarck classified Cannabis indica in 1785, distinguishing it from Cannabis sativa based on plant morphology — leaf shape, height, growth pattern. Indica plants tend to be shorter and bushier; sativa plants taller and more narrow-leafed. These are real physical differences, and they matter to growers.
What they do not reliably predict is what happens inside your body after you consume the product.
The problem is decades of crossbreeding. By 2026, virtually every commercial cannabis cultivar is a hybrid of some degree. The genetic lines between indica and sativa have been blurred so thoroughly that a 2015 study from the University of British Columbia (Sawler et al., published in PLOS ONE) found that the labeled indica/sativa classification of commercial strains had no consistent relationship to their actual genetic profiles. The labels, in many cases, reflected marketing tradition more than botanical reality.
What Actually Determines How Cannabis Affects You
The answer is chemotype — the specific chemical composition of the product, meaning its cannabinoid and terpene profile.
Cannabinoids are the primary active compounds. THC and CBD are the most abundant, but there are over a hundred others, including CBG, CBN, and CBC, each with properties still being characterized. The ratio of THC to CBD in a given product will shape the experience far more than whether the plant was short and bushy or tall and leggy.
Then there are terpenes — the aromatic compounds responsible for the smell and flavor of cannabis, which also appear to influence its physiological effects. Myrcene, for instance, is associated with sedating effects in preclinical research (do Rego et al., 2009), while limonene has been linked to anxiolytic properties. A product high in myrcene may produce the "indica-like" sedation patients expect, regardless of whether the plant was classified as indica, sativa, or hybrid.
A 2021 analysis by Watts et al. at the University of Colorado found that terpene profiles were better predictors of consumer-reported effects than the indica/sativa/hybrid label. Consumers who reported "relaxing" effects were using products higher in myrcene and linalool. Those who reported "energizing" effects were using products higher in terpinolene and limonene. The labels on the jar had little to do with it.
What Patients Should Actually Look At
If you are choosing a cannabis product in North Dakota, here is what I would suggest — not as a physician (I am not one), but as an analytical chemist who has spent more time reading certificates of analysis than is probably healthy:
Ask for the certificate of analysis.
Every licensed product should have one. Look at the cannabinoid profile — not just the THC percentage, but the THC-to-CBD ratio and whether minor cannabinoids are present.
Look at the terpene profile.
If the COA includes terpene data (and not all of them do, which is its own problem), note the dominant terpenes. If you're looking for sedation, products dominant in myrcene or linalool may be more useful than a product labeled "indica" but dominant in terpinolene.
Keep notes.
I say this as someone who has maintained a nightly spreadsheet for five years. You do not need to be that thorough. But writing down what you used, how much, and what happened gives you data that the indica/sativa label never will.
The Categories Aren't Useless — They're Just Insufficient
I am not arguing we should throw the terms away. They carry cultural familiarity, and for patients who find that "indicas" consistently help them sleep, that pattern is real — it's just driven by the underlying chemistry, not the category name. Saying "I sleep better with indica" is like saying "I feel better when I take the round pills." It may be consistently true, but the shape of the pill is not the reason.
The reason is the chemistry. And until you look at the chemistry, you're choosing by the shape of the pill.