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41 studies found for:    hallucinogen | Open Studies
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Rank Status Study
1 Not yet recruiting Persisting Effects of Psilocybin
Condition: Healthy
Intervention: Drug: Psilocybine
2 Recruiting A Double-Blind Trial of Psilocybin-Assisted Treatment of Alcohol Dependence
Condition: Alcohol Dependence
Interventions: Drug: Psilocybin;   Drug: Diphenhydramine;   Behavioral: Motivational Enhancement and Taking Action (META)
3 Recruiting Psilocybin-facilitated Treatment for Cocaine Use
Condition: Cocaine-Related Disorders
Interventions: Drug: Psilocybin;   Drug: Diphenhydramine
4 Recruiting MDMA-assisted and Cognitive-Behavioral Conjoint Therapy (CBCT) in Dyads With One Member With Chronic PTSD
Condition: Posttraumatic Stress Disorder
Interventions: Drug: MDMA;   Behavioral: CBCT
5 Recruiting Psilocybin-facilitated Smoking Cessation Treatment: A Pilot Study
Condition: Nicotine Dependence
Interventions: Drug: Psilocybin-assisted treatment;   Drug: Nicotine Replacement Therapy (NRT)
6 Recruiting Study of Four Different Potencies of Smoked Marijuana in 76 Veterans With Chronic, Treatment-Resistant PTSD
Condition: Posttraumatic Stress Disorder
Interventions: Drug: High THC Marijuana;   Drug: High CBD Marijuana;   Drug: High THC/high CBD marijuana;   Drug: Placebo marijuana
7 Recruiting Psilocybin in Chronic Cluster Headache
Condition: Cluster Headache
Interventions: Drug: 0.143 mg/kg Psilocybin;   Drug: 0.0143 mg/kg Psilocybin;   Drug: Placebo
8 Recruiting Effects of Psilocybin on Behavior, Psychology and Brain Function in Long-term Meditators
Condition: Healthy
Interventions: Drug: Moderately-high dose of psilocybin;   Drug: Moderately-low dose of psilocybin;   Drug: Very-low dose of psilocybin;   Drug: Placebo
9 Recruiting The Effects of Psilocybin-Facilitated Experience on the Psychology and Effectiveness of Religious Professionals
Condition: The Effects of Psilocybin-Facilitated Experience on the Psychology and Effectiveness of Professional Leaders in Religion
Intervention: Drug: Psilocybin
10 Recruiting Effects of Psilocybin-facilitated Experience on the Psychology and Effectiveness of Professional Leaders in Religion
Condition: Healthy
Intervention: Drug: Psilocybin
11 Recruiting Culturally Grounded Early Substance Use Prevention for American Indian Families
Condition: Substance Use
Interventions: Behavioral: Lakota Language enhancement;   Behavioral: Facebook Supplement;   Behavioral: Substance Use Resistance Skills
12 Not yet recruiting Gene-Environment-Interaction: Influence of the COMT Genotype on the Effects of Different Cannabinoids - a PET Study
Conditions: Healthy Volunteers;   Modeling Psychosis
Interventions: Drug: Delta-9-tetrahydrocannabinol;   Drug: Cannabidiol;   Drug: Placebo
13 Recruiting Effects of ECT on Monoamine Oxidase A in Depression Investigated With PET
Condition: Major Depression
Interventions: Device: Electroconvulsive therapy;   Other: Positron emission tomography of the brain using [11C]harmine;   Other: Structural magnetic resonance imaging
14 Not yet recruiting Role of Dopamine, Serotonin and 5-HT2A Receptors in Emotion Processing
Condition: Healthy
Interventions: Drug: LSD;   Drug: MDMA;   Drug: Amphetamine;   Drug: Placebo
15 Not yet recruiting Effects of Delta-9 Tetrahydrocannabinol (THC) on Retention of Memory for Fear Extinction Learning in PTSD: R61 Study
Condition: PostTraumatic Stress Disorder
Interventions: Drug: Placebo Oral Capsule;   Drug: Dronabinol Cap 5 milligrams (MG);   Drug: Dronabinol Cap 10 milligrams (MG)
16 Not yet recruiting Evaluation of the Safety, Tolerability, and Efficacy of Orally Administered PTL201 in MS Patients With Spasticity-related Symptoms
Condition: Multiple Sclerosis
Interventions: Drug: PTL201;   Drug: Placebo Oral Capsule
17 Not yet recruiting A Laboratory Model of Increasing Delta-9-tetrahydrocannabinol (THC) Potency on Cigarette Smoking
Condition: Tobacco Use
Intervention: Drug: THC
18 Recruiting Cannabinoids for Behavioral Problems in Children With ASD
Condition: Autistic Disorder
Interventions: Drug: Cannabinoids - 99% pure cannabinoids mix;   Drug: Placebo;   Drug: Cannabinoids - whole plant extract
19 Not yet recruiting Psilocybin-assisted Group Therapy for Demoralization in Long-term AIDS Survivors
Conditions: Distress;   Depression;   Grief
Interventions: Drug: Psilocybin;   Behavioral: Modified brief Supportive Expressive Group Therapy
20 Recruiting Testing the Interactive Effects of Delta-9-Tetrahydrocannabinol and Pregnenolone: Sub-Study I
Condition: Healthy
Interventions: Drug: Active Dronabinol;   Drug: Active Pregnenolone;   Drug: Placebo Dronabinol;   Drug: Placebo Pregnenolone

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Study has passed its completion date and status has not been verified in more than two years.