Bodily lightness

Bodily lightness is a sensation in which the body feels reduced in weight, as though gravity's hold has loosened or the physical form has grown insubstantial.

As a drug effect it is acute and dose-proportional, fading as the substance wears off. It ranges from a mild buoyancy to a near-complete absence of felt weight, occasionally approaching the impression of having no body at all.

Bodyly lightness is reported less commonly than most somatic drug effects. It is most often induced at moderate to high doses under psychedelics such as LSD, psilocybin mushrooms, and MDA, and dissociatives such as ketamine and dextromethorphan. It also appears under cannabinoids including cannabis, and in a milder, less consistent form under stimulants such as 6-APDB.

Bodily lightness is felt as a quiet release from physical mass: the limbs lose their familiar heaviness, pressure against surfaces seems to diminish, and the sense of occupying a weighted form recedes. It commonly comes with relaxed musculature and a softened awareness of bodily boundaries.

Attending to the lightness tends to deepen it — noticing the absence of weight makes the body feel more absent still. At higher doses, particularly under dissociatives, it can shade into a full detachment from the body.

Bodily lightness arises through different pathways depending on the drug class:

• Psychedelics — act on 5-HT2A receptors, disrupting interoceptive processing and the proprioceptive signals that anchor the body's felt weight.
• Dissociatives — block NMDA receptors, fragmenting sensorimotor integration and loosening the feedback that registers the body as solid and present.
• Cannabinoids — act on CB1 receptors, reducing muscle tone and softening proprioceptive input.
• Stimulants — may shift body-schema perception through dopaminergic arousal, though the mechanism is less well characterized.

How much each pathway contributes in a given case is not fully understood.

Who experiences bodily lightness, and how strongly, varies widely. Higher doses raise both likelihood and intensity across all drug classes. Relaxed, reclined settings favour its emergence — especially under psychedelics and dissociatives — while physical tension or an active, upright posture can suppress it.

Going in expecting lightness tends to be self-fulfilling; attending to the body in a calm, receptive state makes the effect more likely to surface. Prior familiarity with a substance and a settled disposition both support a more consistent experience.