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An intense state of physical sedation and lethargy from potent indica strains that makes movement feel difficult.
Couch lock is an intense state of physical sedation and immobility brought on by consuming potent indica or indica-dominant cannabis strains. The name describes the sensation precisely: you feel so physically heavy, relaxed, and melted into the furniture that getting up feels like an enormous effort.
Couch lock results from a combination of factors in the strain's chemical profile. High levels of myrcene, the most sedating terpene, are strongly associated with the effect. Elevated CBN content (from aged THC degradation) adds additional sedation. High doses of THC combined with these terpenes create the overwhelming physical relaxation. The body's response to heavy CB1 receptor activation in motor control regions of the brain may also contribute to the reduced motivation and physical inertia.
For insomnia sufferers, chronic pain patients, and anyone looking for deep evening relaxation, couch lock is a feature, not a bug. Strains like Granddaddy Purple, Northern Lights, and Afghan Kush are sought out specifically for this effect. For consumers who need to remain functional, couch lock is to be avoided. Choosing sativa-dominant strains, consuming lower doses, and adding CBD can all help prevent unwanted couch lock. If you find yourself unexpectedly couch-locked, remember that the feeling is temporary and typically resolves within one to three hours.