Study: Psilocybin Shows Promise as Treatment for OCD and Tourette’s Syndrome

A study, published in Molecular Psychiatry, led by Professor Bernard Lerer from the Department of Psychiatry at the Hadassah—Hebrew University Medical Center shows promising results for using psilocybin as a potential treatment for obsessive-compulsive disorder (OCD) and Tourette’s syndrome.

Dried psilocybin.

The study, titled “Striking Long Term Beneficial Effects of Single Dose Psilocybin and Psychedelic Mushroom Extract in the SAPAP3 Rodent Model of OCD-Like Excessive Self-Grooming”, was published in the journal Molecular Psychiatry.

The study included 50 genetically modified mice that displayed excessive grooming and anxiety, similar to human OCD behaviors and head-body twitches similar to tics suffered by patients with Tourette’s syndrome.

These mice were randomly given either a single injection of psilocybin, a psychedelic mushroom extract, or a placebo. Raters, unaware of which treatment each mouse received, evaluated the effects at several points over a three-week period.

Mice treated with psilocybin showed a 14.60% decrease in excessive grooming, while those receiving the mushroom extract saw a 19.20% reduction, compared to a significant increase of 118.71 in grooming in the placebo group. The study also observed reductions in other symptoms like tic-like movements and anxiety, with the mushroom extract showing greater benefit in its effect on anxiety. Additionally, the positive effects from a single treatment lasted up to seven weeks in some mice.

“Understanding that over 40% of OCD patients don’t find relief with current treatments, our findings are crucial as they suggest a new way to help these individuals,” Prof. Lerer noted.

“We look forward to advancing to  and further exploring how these treatments can provide long-term benefits. The effects observed on tic-like head and body twitches raise the previously unreported possibility that psilocybin may be effective in patients with Tourette’s syndrome.”

The full study can be found by clicking here.

Thank you for reading The Marijuana Herald! You can find more news stories by clicking here, and you can signup for our newsletter by clicking here

 

 

More articles from The Marijuana Herald.

Florida Lawmaker Files Bill to Ban Public Marijuana Smoking Across the State

Florida Lawmaker Files Bill to Ban Public Marijuana Smoking Across the State

Massachusetts Cannabis Regulators Expected to Finalize Long-Delayed Social Consumption Rules by Christmas

Massachusetts Cannabis Regulators Expected to Finalize Long-Delayed Social Consumption Rules by Christmas

Curaleaf Appeals $31.8 Million Judgment in Michigan Contract Fight With Hello Farms

Curaleaf Appeals $31.8 Million Judgment in Michigan Contract Fight With Hello Farms

Arizona Marijuana Tax Revenue Reached $20.7 Million in October, $233.2 Million Year-to-Date in 2025

Arizona Marijuana Tax Revenue Reached $20.7 Million in October, $233.2 Million Year-to-Date in 2025

New Jersey Bill Would Expand Dispensary Access, Loosen CRC Restrictions, and Strengthen Enforcement Against Illegal Operators

New Jersey Bill Would Expand Dispensary Access, Loosen CRC Restrictions, and Strengthen Enforcement Against Illegal Operators

THC Strengthens Brain-Based Pain Filtering in Fibromyalgia, New Clinical Trial Finds

THC Strengthens Brain-Based Pain Filtering in Fibromyalgia, New Clinical Trial Finds

Hemp Shows Strong Antiviral Activity Against Japanese Encephalitis Virus

Hemp Shows Strong Antiviral Activity Against Japanese Encephalitis Virus

Higher Light Intensity During Flowering Found to Boost CBD Production in Hemp

Higher Light Intensity During Flowering Found to Boost CBD Production in Hemp

Psilocybin Shows Potential to Improve Long-Term Effects of Repetitive Brain Injuries Linked to Intimate Partner Violence

Psilocybin Shows Potential to Improve Long-Term Effects of Repetitive Brain Injuries Linked to Intimate Partner Violence

Florida Campaign to Legalize Recreational Cannabis Has Submitted 675,000 Verified Signatures for 2026 Initiative

Florida Campaign to Legalize Recreational Cannabis Has Submitted 675,000 Verified Signatures for 2026 Initiative

Ohio Marijuana Market Generated $1.25 Billion in Sales Since Adult-Use Launch in August 2024, Producing $164 Million in Tax Revenue

Ohio Marijuana Market Generated $1.25 Billion in Sales Since Adult-Use Launch in August 2024, Producing $164 Million in Tax Revenue

Study: Medical-Grade THC Vape Delivers Precise Microdoses, While Retail Pens Hit Hard but With Unstable Output

Study: Medical-Grade THC Vape Delivers Precise Microdoses, While Retail Pens Hit Hard but With Unstable Output

Arkansas Medical Marijuana Program Reaches 112,760 Registered Patients

Arkansas Medical Marijuana Program Reaches 112,760 Registered Patients

New Mexico Marijuana Sales Reach $475 Million in 2025, Nearly $2 Billion All-Time

New Mexico Marijuana Sales Reach $475 Million in 2025, Nearly $2 Billion All-Time

Curaleaf Reports $320 Million in Q3 Revenue, 158 Dispensaries Across the U.S.

Curaleaf Reports $320 Million in Q3 Revenue, 158 Dispensaries Across the U.S.

Aurora Cannabis Reports $90.4 Million in Fiscal Q2 2026 Revenue, Driven by Record Medical Sales

Aurora Cannabis Reports $90.4 Million in Fiscal Q2 2026 Revenue, Driven by Record Medical Sales

Trulieve Reports $288 Million in Q3 Revenue and $173 Million Year-to-Date Free Cash Flow

Trulieve Reports $288 Million in Q3 Revenue and $173 Million Year-to-Date Free Cash Flow

Study: CBD Shown to Suppress Growth Pathways in Aggressive Breast Cancer Cells

Study: CBD Shown to Suppress Growth Pathways in Aggressive Breast Cancer Cells