Nabilone
A synthetic cannabinoid pharmaceutical, not a terpene or plant-derived compound.
Nabilone is often confused with terpenes because it appears in cannabis discussions. It is not a terpene. It is a factory-made pharmaceutical—a synthetic analog of THC patented by Eli Lilly in the 1970s. It is approved for chemotherapy nausea, has genuine clinical evidence behind it, but is a controlled drug with THC-like side effects. Don't confuse it with plant compounds.
Why This Article Exists
Nabilone is frequently submitted to cannabis reference sites tagged as a terpene. It is not one. Terpenes are volatile hydrocarbons and their oxygenated derivatives, biosynthesized by plants and some insects from isoprene units. Nabilone is a synthetic small-molecule pharmaceutical created by Eli Lilly in the 1970s and approved by the US FDA in 1985 for chemotherapy-induced nausea and vomiting [1]. It does not occur in cannabis or any other plant. This entry clarifies what nabilone actually is so readers searching for the term land on accurate information.
What Nabilone Actually Is
Nabilone (C₂₄H₃₆O₃) is a synthetic analog of Δ⁹-tetrahydrocannabinol (THC) [2]. Structurally it belongs to the dibenzo[b,d]pyran family—the same core scaffold as THC—but with a modified side chain and a ketone (C=O) group at the C9 position [3]. Like THC, nabilone acts as a partial agonist at the CB1 cannabinoid receptor, which is how it produces both therapeutic and psychoactive effects Strong evidence[3][4].
It is administered orally as a 1 mg capsule. Onset occurs in roughly 60–90 minutes, and the elimination half-life of the parent compound is approximately 2 hours, though active metabolites persist much longer in circulation [2]. Because it is a single, defined molecule made in a laboratory under controlled conditions, it has more predictable bioavailability than plant-derived THC and contains no other cannabinoids or terpenes Strong evidence[3].
Approved and Studied Uses
FDA-approved indication
Nabilone is approved in the United States, Canada, the United Kingdom, and several other jurisdictions for chemotherapy-induced nausea and vomiting (CINV) when conventional antiemetics have failed [1][2]. A 2015 Cochrane systematic review of cannabinoids for nausea in cancer patients found that cannabinoids, including nabilone, were superior to placebo. However, they were comparable in efficacy to older antiemetic drugs such as prochlorperazine, and adverse effects were a significant limitation, with many patients choosing the comparison drug over cannabinoids Strong evidence[5].
Off-label and investigational uses
Nabilone has been studied for several other indications, though evidence remains limited:
- Chronic pain (neuropathic and fibromyalgia): Small randomized controlled trials show modest benefit in pain reduction Weak / limited[6].
- PTSD-related nightmares: A small double-blind, placebo-controlled crossover trial in Canadian military personnel reported reduced nightmare frequency Weak / limited[7].
- Spasticity in multiple sclerosis: Mixed results; generally less effective than nabiximols (a whole-plant cannabinoid combination) Weak / limited.
Nabilone is not indicated for appetite stimulation; that therapeutic use is approved only for dronabinol (synthetic THC, brand name Marinol).
Side Effects and Safety
Because nabilone is a CB1 receptor agonist, it produces THC-like effects. Common adverse effects include drowsiness, dizziness, dry mouth, euphoria or dysphoria, ataxia, and orthostatic hypotension Strong evidence[2][4]. At supratherapeutic doses or in patients naive to cannabinoids, it can precipitate anxiety, paranoia, hallucinations, and tachycardia.
Nabilone is classified as a Schedule II controlled substance in the United States (the brand name Cesamet is specifically scheduled), reflecting recognized abuse potential [1]. It should not be combined with alcohol, sedatives, or other central nervous system depressants without direct medical supervision, as the risk of severe CNS depression and respiratory depression increases. Patients with a personal or family history of psychotic disorders, cardiac arrhythmias, or uncontrolled hypertension warrant careful evaluation before use.
How Nabilone Differs From Terpenes and Plant THC
Nabilone is fundamentally distinct from both cannabis terpenes and plant-derived THC.
vs. plant-derived THC: Nabilone is a single defined molecule with predictable oral bioavailability, whereas plant cannabis extracts contain multiple cannabinoids and terpenes in variable ratios Strong evidence[3]. Nabilone has been formulated as a prescription drug with consistent dosing and quality control that whole-plant extracts do not provide.
vs. actual cannabis terpenes: Terpenes such as myrcene, limonene, beta-caryophyllene, and pinene are volatile aroma compounds produced by the cannabis plant and many other plants and insects. They are not psychoactive at typical dietary exposures, are not controlled drugs, and are not pharmaceutical molecules. The only terpene with documented cannabinoid-receptor activity is beta-caryophyllene, a sesquiterpene that acts as a CB2 receptor agonist Strong evidence[8]—a genuine plant compound with cannabinoid-system interaction, unlike nabilone, which is entirely synthetic.
If a website or vendor describes nabilone as "the terpene nabilone," a "nabilone-rich strain," or "nabilone in cannabis," those claims are false and should raise concerns about the credibility of the source.
Why Terpene-Specific Fields Do Not Apply
This article deliberately does not include traditional terpene data such as aroma descriptors, boiling point as fragrance volatility, natural plant sources, or strains in which it is "dominant." Nabilone cannot be described in these terms because it is not a plant compound:
- It has no aroma profile in the plant or fragrance sense; it is a white crystalline powder in a pharmaceutical capsule.
- It does not have a boiling point relevant to cannabis curing or terpene degradation; it is a stable API (active pharmaceutical ingredient).
- It does not occur in any strain of cannabis or other plant.
- It cannot be "dominant" in a chemovar, as it is not produced by the plant.
Filling in these fields with fabricated data would mislead readers. If you encounter a vendor or forum claiming otherwise, that is a clear indicator that the source is unreliable.
Sources
- Government US Food and Drug Administration. Cesamet (nabilone) Capsules: Prescribing Information. Approved 1985, revised label.
- Peer-reviewed Ware MA, Daeninck P, Maida V. A review of nabilone in the treatment of chemotherapy-induced nausea and vomiting. Therapeutics and Clinical Risk Management. 2008;4(1):99–107.
- Peer-reviewed Pertwee RG. The diverse CB1 and CB2 receptor pharmacology of three plant cannabinoids: Δ⁹-tetrahydrocannabinol, cannabidiol and Δ⁹-tetrahydrocannabivarin. British Journal of Pharmacology. 2008;153(2):199–215.
- Peer-reviewed Lemberger L, Rubin A, Wolen R, et al. Pharmacokinetics, metabolism and drug-abuse potential of nabilone. Cancer Treatment Reviews. 1982;9(Suppl B):17–23.
- Peer-reviewed Smith LA, Azariah F, Lavender VTC, Stoner NS, Bettiol S. Cannabinoids for nausea and vomiting in adults with cancer receiving chemotherapy. Cochrane Database of Systematic Reviews. 2015;(11):CD009464.
- Peer-reviewed Skrabek RQ, Galimova L, Ethans K, Perry D. Nabilone for the treatment of pain in fibromyalgia. Journal of Pain. 2008;9(2):164–173.
- Peer-reviewed Jetly R, Heber A, Fraser G, Boisvert D. The efficacy of nabilone, a synthetic cannabinoid, in the treatment of PTSD-associated nightmares: A preliminary randomized, double-blind, placebo-controlled cross-over design study. Psychoneuroendocrinology. 2015;51:585–588.
- Peer-reviewed Gertsch J, Leonti M, Raduner S, et al. Beta-caryophyllene is a dietary cannabinoid. Proceedings of the National Academy of Sciences. 2008;105(26):9099–9104.
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