Trial reportClinical pharmacology and therapeutics2021
Pharmacokinetics and Pharmacodynamics of Lysergic Acid Diethylamide Microdoses in Healthy Participants.
Trial report in Clinical pharmacology and therapeutics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
25 citing papers in PubMed, 2 syntheses or guidelines pooled it, 62 citations in OpenAlex.
- Incremental efficacy systematic review and meta-analysis of psilocybin-for-depression RCTs.Psychopharmacology · 2025Pooled it
- Keeping the promise: a critique of the current state of microdosing research.Frontiers in psychiatry · 2024Pooled it
- Pharmacokinetics, Pharmacodynamics, and Urinary Recovery of Oral Mescaline Hydrochloride in Healthy Participants.Clinical pharmacokinetics · 2025Trial
- Absolute Oral Bioavailability and Bioequivalence of LSD Base and Tartrate in a Double-Blind, Placebo-Controlled, Crossover Study.Clinical pharmacology and therapeutics · 2025Trial
- Safety and Efficacy of Repeated Low-Dose LSD for ADHD Treatment in Adults: A Randomized Clinical Trial.JAMA psychiatry · 2025Trial
- Multimodal creativity assessments following acute and sustained microdosing of lysergic acid diethylamide.Psychopharmacology · 2025Trial
- Pharmacological and non-pharmacological predictors of the LSD experience in healthy participants.Translational psychiatry · 2024Trial
- Inter-individual variability in neural response to low doses of LSD.Translational psychiatry · 2024Trial
- Greater subjective effects of a low dose of LSD in participants with depressed mood.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2024Trial
- Ketanserin Reverses the Acute Response to LSD in a Randomized, Double-Blind, Placebo-Controlled, Crossover Study in Healthy Participants.The international journal of neuropsychopharmacology · 2023Trial
- Safety pharmacology of acute LSD administration in healthy subjects.Psychopharmacology · 2022Trial
- Repeated low doses of LSD in healthy adults: A placebo-controlled, dose-response study.Addiction biology · 2022Trial
- Overcoming Pharmacokinetic and Peripheral Safety Challenges in Psychedelic Therapies: The Promise of Advanced Drug Delivery Systems.ACS pharmacology & translational science · 2026Review
- Pharmacological topics of interest for young people: misinformation on TikTok is common.Naunyn-Schmiedeberg's archives of pharmacology · 2026Article
- Low-dose lysergic acid diethylamide alters subjective visual perception but not visual contrast surround suppression.Neuroscience of consciousness · 2026Article
- Pharmacological Properties of Psychedelics with a Special Focus on Potential Harms.Current topics in behavioral neurosciences · 2026Review
- Molecules, meaning, and physiology: disentangling the active ingredients of psychedelic therapeutics.Frontiers in neuroscience · 2026Article
- Assessing the Potential Cardiovascular Risk of Microdosing the Psychedelic LSD in Mice.ACS pharmacology & translational science · 2025Article
- Lysergic Acid Diethylamide (LSD) and the Heart: Exploring the Potential Impacts of LSD on Cardiovascular Function.Cureus · 2025Review
- Discriminating evidence - use and misuse of the drug-discrimination test in abuse potential assessment of novel CNS drugs.Journal of psychopharmacology (Oxford, England) · 2025Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors at 4 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
"Microdoses" of lysergic acid diethylamide (LSD) are used recreationally to enhance mood and cognition. Increasing interest has also been seen in developing LSD into a medication. Therefore, we performed a pharmacokinetic-pharmacodynamic study using very low doses of LSD. Single doses of LSD base (5, 10, and 20 µg) and placebo were administered in a double-blind, randomized, placebo-controlled crossover study in 23 healthy participants. Test days were separated by at least 5 days. Plasma levels of LSD and subjective effects were assessed up to 6 hours after administration. Pharmacokinetic parameters were determined using compartmental modeling. Concentration-subjective effect relationships were described using pharmacokinetic-pharmacodynamic modeling. Mean (95% confidence interval) maximal LSD concentrations were 151 pg/mL (127-181), 279 pg/mL (243-320), and 500 pg/mL (413-607) after 5, 10, and 20 µg LSD administration, respectively. Maximal concentrations were reached after 1.1 hours. The mean elimination half-life was 2.7 hours (1.5-6.2). The 5 µg dose of LSD elicited no significant acute subjective effects. The 10 µg dose of LSD significantly increased ratings of "under the influence" and "good drug effect" compared with placebo. These effects began an average of 1.1 hours after 10 µg LSD administration, peaked at 2.5 hours, and ended at 5.1 hours. The 20 µg dose of LSD significantly increased ratings of "under the influence," "good drug effects," and "bad drug effects." LSD concentrations dose-proportionally increased at doses as low as 5-20 µg and decreased with a half-life of 3 hours. The threshold dose of LSD base for psychotropic effects was 10 µg.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.