Cannabis Users with ADHD Reported Fewer Symptoms After Acute Use but Showed Cognitive Differences

What the researchers found

Cannabis users with ADHD reported subjective improvement in ADHD symptoms after acute cannabis use. However, chronic cannabis use was associated with cognitive differences on objective measures, regardless of whether participants had ADHD. The study assessed both chronic effects (regular use) and acute effects (before/after cannabis use).

Why it matters

Many people with ADHD use cannabis to self-treat symptoms, but objective evidence is limited. This study distinguishes between perceived symptom improvement and actual cognitive performance, finding they may diverge.

The numbers in context

104 adults in 4 matched groups of 26. Assessed chronic and acute cannabis effects. Subjective: ADHD symptom reduction after acute use. Objective: cognitive differences associated with chronic use regardless of ADHD.

How the study worked

Repeated-measures quasi-experimental study with 104 adults in 4 groups: cannabis users with ADHD (n=26), non-users with ADHD (n=26), cannabis users without ADHD (n=26), non-users without ADHD (n=26). Session 1 assessed chronic effects; session 2 assessed acute effects.

What this study cannot tell us

Quasi-experimental, not randomized. Small groups (26 per cell). Cannot control for all confounders between cannabis users and non-users. Self-selected participants. Acute effects measured in a controlled setting may not reflect real-world use.

How to read the evidence

Well-designed quasi-experimental study with matched groups and dual outcome assessment, but small sample and non-randomization limit to moderate.

When this study was published

Recently published quasi-experimental study.

The bigger picture

The disconnect between subjective symptom improvement and objective cognitive effects suggests cannabis may make people with ADHD feel better without necessarily improving cognitive function, which has implications for self-medication decisions.

Questions still open

• Does long-term cannabis use worsen ADHD cognitive deficits?
• Could specific cannabinoid profiles improve ADHD symptoms without cognitive costs?

Common questions

Read the original research

A naturalistic examination of the effects of chronic and acute cannabis use on cognition and perceived symptoms of attention-deficit/hyperactivity disorder.

Psychopharmacology

Citation

Stueber, Amanda M; LaFrance, Emily M; Herbert, Robyn S; Cuttler, Carrie. (2025). A naturalistic examination of the effects of chronic and acute cannabis use on cognition and perceived symptoms of attention-deficit/hyperactivity disorder.. Psychopharmacology. https://doi.org/10.1007/s00213-025-06921-9

Explore the wider topic

• How THC Affects Your Amygdala: The Brain's Threat Detector and Cannabis
• The Anandamide Connection: Your Body's Natural Bliss Molecule
• How Long for Cannabinoid Receptors to Return to Normal
• Cannabis and the Developing Brain: What Every Teenager (and Parent) Should Know
• Why Can't I Enjoy Anything Without Weed? The Science Behind It
• Dopamine Recovery After Quitting Weed: What the Science Says
• The Endocannabinoid System Explained Simply: What It Does and Why It Matters
• Your Endocannabinoid System Explained: Why Withdrawal Happens
• Your Nervous System After Quitting Weed: Fight or Flight
• Using Weed Under 18: What It Does to Your Developing Brain
• What THC Does to Your Brain: Why Withdrawal Happens
• THC and Your Prefrontal Cortex: What Cannabis Does to Your Decision-Making Brain
• Weed, Cortisol, and Stress: What Cannabis Does to Your Stress Hormones
• Weed and Memory: What the Science Says About THC and Your Hippocampus
• Weed and Motivation: Is Amotivational Syndrome Real?
• Weed and Your Nervous System: What THC Actually Does to Your Brain and Body
• How Weed Rewires Your Reward System (And How to Reset It)
• THC and Adderall: Stimulants and Cannabis in the Same Brain