Repeated Low-Dose LSD: What a 2022 Controlled Study Found

A placebo-controlled study in 56 healthy adults examined repeated low-dose LSD. Its reported results included modest subjective effects but no improvement in mood or most measured task performance.

What the researchers asked

The de Wit and colleagues study, published in Addiction Biology in 2022, used a double-blind dose-response design. It investigated healthy adults rather than testing a treatment in a diagnosed patient population.

The limited number of administrations and controlled setting are essential details. This was not an assessment of every pattern of real-world use or a long-term safety study.

What the results support

The higher tested condition produced modest subjective effects. The study did not find improvement in mood or most measured task performance, and no residual effects were detected at follow-up.

A reader should distinguish the presence of an acute sensation from evidence of a durable benefit. Those are different outcomes and deserve separate descriptions.

Safety wording needs boundaries

The authors described safety within the controlled study setting and its limited exposure. That language should not be converted into a claim that repeated unsupervised LSD use is generally safe.

Screening, monitoring, and the known research intervention differ from uncontrolled products or concurrent medications. Individual health circumstances remain important.

How it fits the wider evidence

This 2022 result contributes to a cautious picture rather than closing every research question. Different study designs and outcome choices can yield different observations.

Compare it with the time-perception experiment, which asked a narrower laboratory question rather than testing therapeutic benefit.

Sources and further reading

• de Wit et al., Addiction Biology (2022)
• UChicago Medicine study summary

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Medical information: This article is for education, not diagnosis or treatment. Discuss health decisions with a qualified clinician. Do not change prescribed treatment based on this article.

The accompanying picture is an illustrative editorial image, not a photograph of the cited study or its participants.