Roland R Griffiths

Professor

1969 …2020

Research output per year

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Research Output

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2020

Emotions and brain function are altered up to one month after a single high dose of psilocybin

Barrett, F. S., Doss, M. K., Sepeda, N. D., Pekar, J. J. & Griffiths, R. R., Dec 1 2020, In : Scientific reports. 10, 1, 2214.

Research output: Contribution to journalArticle

Open Access

Persisting Reductions in Cannabis, Opioid, and Stimulant Misuse After Naturalistic Psychedelic Use: An Online Survey

Garcia-Romeu, A., Davis, A. K., Erowid, E., Erowid, F., Griffiths, R. R. & Johnson, M. W., Jan 22 2020, In : Frontiers in Psychiatry. 10, 955.

Research output: Contribution to journalArticle

Open Access

Psilocybin acutely alters the functional connectivity of the claustrum with brain networks that support perception, memory, and attention

Barrett, F. S., Krimmel, S. R., Griffiths, R., Seminowicz, D. A. & Mathur, B. N., Sep 2020, In : NeuroImage. 218, 116980.

Research output: Contribution to journalArticle

Open Access

Survey of entity encounter experiences occasioned by inhaled N,N-dimethyltryptamine: Phenomenology, interpretation, and enduring effects

Davis, A. K., Clifton, J. M., Weaver, E. G., Hurwitz, E. S., Johnson, M. W. & Griffiths, R. R., Jan 1 2020, (Accepted/In press) In : Journal of Psychopharmacology.

Research output: Contribution to journalArticle

Open Access
2019

5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT) used in a naturalistic group setting is associated with unintended improvements in depression and anxiety

Davis, A. K., So, S., Lancelotta, R., Barsuglia, J. P. & Griffiths, R. R., Mar 4 2019, In : American Journal of Drug and Alcohol Abuse. 45, 2, p. 161-169 9 p.

Research output: Contribution to journalArticle

A randomized controlled trial of a manual-only treatment for reduction and cessation of problematic caffeine use

Sweeney, M., Meredith, S. E., Juliano, L. M., Evatt, D. P. & Griffiths, R. R., Feb 1 2019, In : Drug and Alcohol Dependence. 195, p. 45-51 7 p.

Research output: Contribution to journalArticle

Cessation and reduction in alcohol consumption and misuse after psychedelic use

Garcia-Romeu, A., Davis, A. K., Erowid, F., Erowid, E., Griffiths, R. R. & Johnson, M. W., Jan 1 2019, In : Journal of Psychopharmacology.

Research output: Contribution to journalArticle

2018

Double-blind comparison of the two hallucinogens psilocybin and dextromethorphan: effects on cognition

Barrett, F., Carbonaro, T. M., Hurwitz, E., Johnson, M. W. & Griffiths, R. R., Jan 1 2018, (Accepted/In press) In : Psychopharmacology.

Research output: Contribution to journalArticle

Intensity of mystical experiences occasioned by 5-MeO-DMT and comparison with a prior psilocybin study

Barsuglia, J., Davis, A. K., Palmer, R., Lancelotta, R., Windham-Herman, A. M., Peterson, K., Polanco, M., Grant, R. & Griffiths, R. R., Dec 6 2018, In : Frontiers in Psychology. 9, DEC, 2459.

Research output: Contribution to journalArticle

Psychedelic therapy for smoking cessation: Qualitative analysis of participant accounts

Noorani, T., Garcia-Romeu, A., Swift, T. C., Griffiths, R. R. & Johnson, M. W., Jul 1 2018, In : Journal of Psychopharmacology. 32, 7, p. 756-769 14 p.

Research output: Contribution to journalArticle

2017

Double-blind comparison of the two hallucinogens psilocybin and dextromethorphan: similarities and differences in subjective experiences

Carbonaro, T. M., Johnson, M. W., Hurwitz, E. & Griffiths, R. R., Nov 7 2017, (Accepted/In press) In : Psychopharmacology. p. 1-14 14 p.

Research output: Contribution to journalArticle

Effects of caffeine on alcohol reinforcement: beverage choice, self-administration, and subjective ratings

Sweeney, M., Meredith, S. E., Evatt, D. P. & Griffiths, R. R., Mar 1 2017, In : Psychopharmacology. 234, 5, p. 877-888 12 p.

Research output: Contribution to journalArticle

Qualitative and quantitative features of music reported to support peak mystical experiences during psychedelic therapy sessions

Barrett, F. S., Robbins, H., Smooke, D., Brown, J. L. & Griffiths, R. R., Jul 25 2017, In : Frontiers in Physiology. 8, JUL, 1238.

Research output: Contribution to journalArticle

2016

A brief manualized treatment for problematic caffeine use: A randomized control trial

Evatt, D. P., Juliano, L. M. & Griffiths, R. R., Feb 1 2016, In : Journal of Consulting and Clinical Psychology. 84, 2, p. 113-121 9 p.

Research output: Contribution to journalArticle

Long-term follow-up of psilocybin-facilitated smoking cessation

Johnson, M. W., Garcia-Romeu, A. & Griffiths, R. R., Jul 23 2016, (Accepted/In press) In : American Journal of Drug and Alcohol Abuse. p. 1-6 6 p.

Research output: Contribution to journalArticle

Naltrexone but Not Ketanserin Antagonizes the Subjective, Cardiovascular, and Neuroendocrine Effects of Salvinorin-A in Humans

Maqueda, A. E., Valle, M., Addy, P. H., Antonijoan, R. M., Puntes, M., Coimbra, J., Ballester, M. R., Garrido, M., González, M., Claramunt, J., Barker, S., Lomnicka, I., Waguespack, M., Johnson, M. W., Griffiths, R. R. & Riba, J., Jul 1 2016, In : The international journal of neuropsychopharmacology. 19, 7

Research output: Contribution to journalArticle

Psilocybin produces substantial and sustained decreases in depression and anxiety in patients with life-threatening cancer: A randomized double-blind trial

Griffiths, R. R., Johnson, M. W., Carducci, M. A., Umbricht, A., Richards, W. A., Richards, B. D., Cosimano, M. P. & Klinedinst, M. A., Dec 1 2016, In : Journal of Psychopharmacology. 30, 12, p. 1181-1197 17 p.

Research output: Contribution to journalArticle

Survey study of challenging experiences after ingesting psilocybin mushrooms: Acute and enduring positive and negative consequences

Carbonaro, T. M., Bradstreet, M. P., Barrett, F., MacLean, K. A., Jesse, R., Johnson, M. W. & Griffiths, R. R., Dec 1 2016, In : Journal of Psychopharmacology. 30, 12, p. 1268-1278 11 p.

Research output: Contribution to journalArticle

Time course of pharmacokinetic and hormonal effects of inhaled high-dose salvinorin A in humans

Johnson, M. W., MacLean, K. A., Caspers, M. J., Prisinzano, T. E. & Griffiths, R. R., Apr 1 2016, In : Journal of Psychopharmacology. 30, 4, p. 323-329 7 p.

Research output: Contribution to journalArticle

2015

Inhaled vs. oral alprazolam: Subjective, behavioral and cognitive effects, and modestly increased abuse potential

Reissig, C. J., Harrison, J. A., Carter, L. P. & Griffiths, R. R., Jan 2015, In : Psychopharmacology. 232, 5, p. 871-883 13 p.

Research output: Contribution to journalArticle

Nicotine reinforcement in never-smokers

Duke, A. N., Johnson, M. W., Reissig, C. J. & Griffiths, R. R., Dec 1 2015, In : Psychopharmacology. 232, 23, p. 4243-4252 10 p.

Research output: Contribution to journalArticle

Salvinorin-A induces intense dissociative effects, blocking external sensory perception and modulating interoception and sense of body ownership in humans

Maqueda, A. E., Valle, M., Addy, P. H., Antonijoan, R. M., Puntes, M., Coimbra, J., Ballester, M. R., Garrido, M., González, M., Claramunt, J., Barker, S., Johnson, M. W., Griffiths, R. R. & Riba, J., 2015, In : International Journal of Neuropsychopharmacology. 18, 12, p. 1-14 14 p.

Research output: Contribution to journalArticle

2014

Pilot study of the 5-HT2AR agonist psilocybin in the treatment of tobacco addiction

Johnson, M. W., Garcia-Romeu, A., Cosimano, M. P. & Griffiths, R. R., 2014, In : Journal of Psychopharmacology. 28, 11, p. 983-992 10 p.

Research output: Contribution to journalArticle

2013

Acute cognitive effects of high doses of dextromethorphan relative to triazolam in humans

Carter, L. P., Reissig, C. J., Johnson, M. W., Klinedinst, M. A., Griffiths, R. R. & Mintzer, M. Z., Jan 1 2013, In : Drug and alcohol dependence. 128, 3, p. 206-213 8 p.

Research output: Contribution to journalArticle

Cognitive effects of intramuscular ketamine and oral triazolam in healthy volunteers

Carter, L. P., Kleykamp, B. A., Griffiths, R. R. & Mintzer, M. Z., Mar 1 2013, In : Psychopharmacology. 226, 1, p. 53-63 11 p.

Research output: Contribution to journalArticle

Comparative abuse liability of GHB and ethanol in humans

Johnson, M. W. & Griffiths, R. R., Apr 2013, In : Experimental and clinical psychopharmacology. 21, 2, p. 112-123 12 p.

Research output: Contribution to journalArticle

Dose-related effects of salvinorin A in humans: Dissociative, hallucinogenic, and memory effects

MacLean, K. A., Johnson, M. W., Reissig, C. J., Prisinzano, T. E. & Griffiths, R. R., Mar 1 2013, In : Psychopharmacology. 226, 2, p. 381-392 12 p.

Research output: Contribution to journalArticle

LC-MS/MS quantification of salvinorin A from biological fluids

Caspers, M. J., Williams, T. D., Lovell, K. M., Lozama, A., Butelman, E. R., Kreek, M. J., Johnson, M., Griffiths, R., MacLean, K. & Prisinzano, T. E., 2013, In : Analytical Methods. 5, 24, p. 7042-7048 7 p.

Research output: Contribution to journalArticle

2012

Characterization of individuals seeking treatment for caffeine dependence

Juliano, L. M., Evatt, D. P., Richards, B. D. & Griffiths, R. R., Dec 1 2012, In : Psychology of Addictive Behaviors. 26, 4, p. 948-954 7 p.

Research output: Contribution to journalArticle

Psilocybin dose-dependently causes delayed, transient headaches in healthy volunteers

Johnson, M. W., Andrew Sewell, R. & Griffiths, R. R., Jun 1 2012, In : Drug and alcohol dependence. 123, 1-3, p. 132-140 9 p.

Research output: Contribution to journalArticle

2011

Caffeine choice prospectively predicts positive subjective effects of caffeine and d-amphetamine

Sigmon, S. C. & Griffiths, R. R., Nov 1 2011, In : Drug and alcohol dependence. 118, 2-3, p. 341-348 8 p.

Research output: Contribution to journalArticle

Energy Drink Consumption and Increased Risk for Alcohol Dependence

Arria, A. M., Caldeira, K. M., Kasperski, S. J., Vincent, K. B., Griffiths, R. R. & O'Grady, K. E., Feb 1 2011, In : Alcoholism: Clinical and Experimental Research. 35, 2, p. 365-375 11 p.

Research output: Contribution to journalArticle

Human psychopharmacology and dose-effects of salvinorin A, a kappa opioid agonist hallucinogen present in the plant Salvia divinorum

Johnson, M. W., MacLean, K. A., Reissig, C. J., Prisinzano, T. E. & Griffiths, R. R., May 1 2011, In : Drug and alcohol dependence. 115, 1-2, p. 150-155 6 p.

Research output: Contribution to journalArticle

Intravenous self-administration of gamma-hydroxybutyrate (GHB) in baboons

Goodwin, A. K., Kaminski, B. J., Griffiths, R. R., Ator, N. A. & Weerts, E. M., Apr 1 2011, In : Drug and alcohol dependence. 114, 2-3, p. 217-224 8 p.

Research output: Contribution to journalArticle

Psilocybin occasioned mystical-type experiences: Immediate and persisting dose-related effects

Griffiths, R. R., Johnson, M. W., Richards, W. A., Richards, B. D., McCann, U. & Jesse, R., Dec 1 2011, In : Psychopharmacology. 218, 4, p. 649-665 17 p.

Research output: Contribution to journalArticle

2010

Dose Effects of Triazolam and Alcohol on Cognitive Performance in Healthy Volunteers

Kleykamp, B. A., Griffiths, R. R. & Mintzer, M. Z., Feb 1 2010, In : Experimental and clinical psychopharmacology. 18, 1, p. 1-16 16 p.

Research output: Contribution to journalArticle

Dose Effects of Triazolam and Scopolamine on Metamemory

Mintzer, M. Z., Kleykamp, B. A. & Griffiths, R. R., Feb 1 2010, In : Experimental and clinical psychopharmacology. 18, 1, p. 17-31 15 p.

Research output: Contribution to journalArticle

Hallucinogens as medicine

Griffiths, R. R. & Grob, C. S., Dec 2010, In : Scientific American. 303, 6, p. 77-79 3 p.

Research output: Contribution to journalArticle