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Dosage-Response Curve

Pharmacology

The relationship between how much of a drug someone takes and the size of the effect — unusually non-linear for some psychedelics, where a "sub-perceptual" microdose and a full dose can produce qualitatively different, not just weaker-or-stronger, effects.

Example: This is the basis of the central claim in microdosing: that doses too low to be consciously felt could still produce real benefits. A 2021 placebo-controlled "self-blinding" citizen-science study of real-world microdosers found improvements in mood and wellbeing — but the same improvements showed up in the placebo group, suggesting expectation, not pharmacology, explained the effect at that dose.

What is a dosage-response curve?

The relationship between how much of a drug someone takes and the size of the effect — unusually non-linear for some psychedelics, where a "sub-perceptual" microdose and a full dose can produce qualitatively different, not just weaker-or-stronger, effects.

Does the microdosing claim hold up against controlled testing?

Not clearly. A 2021 placebo-controlled "self-blinding" citizen-science study of real-world microdosers found improvements in mood and wellbeing — but the same improvements showed up in the placebo group, suggesting expectation, not pharmacology, explained the effect at that dose.