LSD increases sleep duration the night after microdosing

This Phase I RCT (n=80) examined the effects of microdosing LSD (10μcg; 14x; 6w) on sleep in healthy adult male volunteers, with doses self-administered every third day and sleep monitored through a commercially available sleep/activity tracker. The results showed that participants in the LSD group slept an extra 24.3 minutes per night on the night after microdosing compared to the placebo group, with no changes in sleep stages or physical activity.

Abstract of LSD increases sleep duration the night after microdosing

“Microdosing psychedelic drugs, at a level below the threshold to induce hallucinations, is an increasingly common lifestyle practise. However, the effects of microdosing on sleep have not been previously reported. Here we report results from a Phase 1 randomised controlled trial in which 80 healthy adult male volunteers received a six week course of either LSD (10 mcg) or placebo with doses self-administered every third day. Participants used a commercially available sleep/activity tracker for the duration of the trial. Data from 3231 nights of sleep showed that on the night after microdosing participants in the LSD group slept an extra 24.3 minutes per night (95% Confidence Interval 10.3 – 38.3 minutes) compared to placebo – with no reductions of sleep observed on the dosing day itself. There were no changes in the proportion of time spent in various sleep stages or in participant physical activity. These results show clear modification of the physiological sleep requirements in healthy volunteers who microdose, and may have implications for the proposed therapeutic effects of microdosing in mood disorders such as major depressive disorder where sleep is frequently disturbed. The clear, clinically significant, changes in objective measurements of sleep observed are difficult to explain as a placebo effect.”

Authors: Nathan Allen, Aron Jeremiah, Robin Murphy, Rachael Sumner, Anna Forsyth, Nicholas Hoeh, David B. Menkes, William Evans, Suresh Muthukumaraswamy, Frederick Sundram & Partha Roop

Summary of LSD increases sleep duration the night after microdosing

Microdosing is a relatively recent practice in which users self-administer psychedelic drugs in repeated doses at levels below the threshold for overtly causing hallucinations. It has been reported to cause distinct changes in neurophysiological function but no reports of changes in objectively measured behaviours. In a crossover design study, ayahuasca did not subjectively impair sleep quality, but decreased the amount and relative proportion of time spent in REM sleep, increased REM onset latency, and enhanced power of slow-wave NREM sleep. Psilocybin increased REM onset latency with a trend to decrease REM duration.

LSD administered just before or one hour after participants went to sleep increased REM duration and body movements, and arousal periods occurred during some REM sleep periods. However, the timing of drug administration was inconsistent with modern microdosing practices.

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LSD increases sleep duration the night after microdosing

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Cite this paper (APA)

Allen, N., Jeremiah, A., Murphy, R., Sumner, R., Forsyth, A., Hoeh, N., ... & Roop, P. (2024). LSD increases sleep duration the night after microdosing. Translational Psychiatry14(1), 191.

Study details

Compounds studied

Topics studied

Study characteristics
Original Re-analysis Placebo-Controlled Double-Blind Longitudinal Randomized

80 Humans


Institutes associated with this publication

MindBio Therapeutics
MindBio Therapeutics is conducting clinical research exploring the effects of microdosing psychedelic medicines to treat a range of medical conditions such as depression, anxiety, PTSD, panic disorder, chronic pain and opioid addiction.

Compound Details

The psychedelics given at which dose and how many times

LSD 10 μg | 14x

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