Couch Lock
Heavy sedation and motor relaxation from cannabis; dose and route matter most.
Couch lock is real—higher THC doses produce sedation and motor slowing in controlled studies. But the folk explanations (indica genetics, myrcene thresholds, CBN as a sleepy compound) don't hold up. It's mostly about how much THC you consumed and how you consumed it. Marketing loves to blame a strain's terpene profile; the truth is messier and dose-dependent.
Definition
Couch lock (noun) — a colloquial term for a heavy sedative and physically relaxing effect after consuming cannabis, characterized by reluctance or inability to get up and move. It is a subjective effect report, not a clinically defined syndrome or medical diagnosis.
What it feels like
Users describe deep muscle relaxation, limb heaviness, mental slowness, and a strong desire to stay seated or lie down. It typically appears at higher THC doses and is more common with edibles than with smoking or vaporization Weak / limited[1].
What probably causes it
The primary driver is dose and route of administration: higher THC exposure reliably produces stronger sedation, motor slowing, and impaired psychomotor performance in controlled studies Strong evidence[2][3]. The route matters because oral cannabis (edibles) undergoes hepatic metabolism to 11-hydroxy-THC, which has a longer half-life than smoked THC; this may contribute to extended sedation, though direct evidence comparing the subjective sedative intensity of the two metabolites in humans is limited Weak / limited[1].
Individual factors—tolerance, metabolism, set and setting, coadministered CBD, and prior sleep debt—also modulate how heavy the effect feels Anecdote.
Common folk explanations are weaker than they sound:
- "Indica causes couch lock." The indica/sativa split does not reliably predict chemistry or effects; chemotype (cannabinoid and terpene profile) matters more, and even that predicts effects only loosely Disputed[4].
- "Myrcene above 0.5% causes couch lock." This specific threshold is repeated everywhere online but has no primary source and no controlled human data behind it No data. Myrcene has shown sedative effects in some animal studies at high doses Weak / limited[5], but that does not establish a threshold in smoked or vaporized cannabis, and animal models do not reliably translate to human subjective effects.
- "CBN causes couch lock." CBN is often marketed as the "sleepy cannabinoid," but a small controlled trial found no meaningful sedative effect at typical doses Weak / limited[6].
What it doesn't mean
Couch lock is not a medical diagnosis, not evidence of a specific strain lineage, and not proof of any particular terpene profile. It is also not acutely dangerous in isolation—but heavy sedation combined with driving, cooking, or caring for others carries real risk Strong evidence[3].
See also
Sources
- Peer-reviewed Lemberger L, Crabtree RE, Rowe HM. 11-hydroxy-Δ9-tetrahydrocannabinol: pharmacology, disposition, and metabolism of a major metabolite of marihuana in man. Science. 1972;177(4043):62–64.
- Peer-reviewed Curran HV, Freeman TP, Mokrysz C, Lewis DA, Morgan CJ, Parsons LH. Keep off the grass? Cannabis, cognition and addiction. Nature Reviews Neuroscience. 2016;17(5):293–306.
- Peer-reviewed Ramaekers JG, Berghaus G, van Laar M, Drummer OH. Dose related risk of motor vehicle crashes after cannabis use. Drug and Alcohol Dependence. 2004;73(2):109–119.
- Peer-reviewed Smith CJ, Vergara D, Keegan B, Jikomes N. The phytochemical diversity of commercial Cannabis in the United States. PLoS ONE. 2022;17(5):e0267498.
- Peer-reviewed do Vale TG, Furtado EC, Santos JG, Viana GS. Central effects of citral, myrcene and limonene, constituents of essential oil chemotypes from Lippia alba. Phytomedicine. 2002;9(8):709–714.
- Peer-reviewed Karniol IG, Shirakawa I, Takahashi RN, Knobel E, Musty RE. Effects of Δ9-tetrahydrocannabinol and cannabinol in man. Pharmacology. 1975;13(6):502–512.
How this page was made
Generation history
Drafted with AI assistance and checked by a separate automated fact-check pass. Not every article has been read by a person. See how articles are made.
Related
- Cultivar — A named plant variety, botanically defined but unreliable in cannabis markets.
- Flowering Stage — The cannabis life phase when plants produce resinous flower buds and cannabinoids.