Man Attempts Suicide After Paranoia from Heavy THC and THC-A Use | Research

The takeaway

A case report describes a patient who developed persistent paranoia lasting 28 days and attempted suicide after heavy daily use of THC gummies and THC-A, highlighting risks of unfamiliar cannabinoid products.

Clinicians treating cannabis-related psychiatric emergencies, consumers of cannabinoid products, regulators, and mental health professionals.

What the researchers found

A patient developed paranoia persisting for 28 days following daily consumption of 15-30 mg THC gummies and THC-A in dried plant form, culminating in a suicide attempt — with the patient reporting unfamiliarity with THC-A dosing and its psychoactive potential when heated.

Why it matters

THC-A is often marketed as non-psychoactive, but becomes THC when heated — this case illustrates how product labeling confusion can lead to excessive use and severe psychiatric outcomes.

The numbers in context

15-30 mg/day THC gummies + THC-A dried plant; paranoia persisting 28 days; culminated in suicide attempt

How the study worked

Single case report documenting clinical presentation, substance use history, and course of paranoid symptoms following heavy cannabis use with THC-A products.

What this study cannot tell us

Single case report; cannot establish causality; patient may have had predisposing psychiatric vulnerability; exact THC-A dosing unclear; no systematic assessment of psychotic symptoms; publication bias toward dramatic cases.

How to read the evidence

Single case report provides an important safety signal but cannot establish prevalence or causality.

When this study was published

Published 2026; reflects emerging risks from the growing THC-A product market.

The bigger picture

The proliferation of novel cannabinoid products like THC-A, often marketed through legal loopholes as non-psychoactive, creates consumer confusion that can have life-threatening consequences.

Questions still open

How common is consumer confusion about THC-A? Should THC-A products carry psychoactive warnings? What psychiatric screening could identify individuals at risk for cannabis-induced psychosis?

Common questions

Can THC-A get you high?

Yes — while THC-A is non-psychoactive in its raw form, it converts to psychoactive THC when heated (smoked, vaped, or cooked). This case report describes a patient who was unaware of this conversion, leading to excessive use and severe psychiatric effects.

Can cannabis cause paranoia and suicidal thoughts?

Heavy cannabis use, particularly with high-potency products, can trigger prolonged paranoia in some individuals. This case documents paranoia lasting 28 days that led to a suicide attempt, though individual psychiatric vulnerability likely plays a role.

Read the original research

Suicide attempt and paranoia persisting for 28 days following heavy delta-9-tetrahydrocannabinolic acid and tetrahydrocannabinol use: A case report.

PCN reports : psychiatry and clinical neurosciences, 5(1), e70290

View on PubMed ↗Publisher’s paper ↗

Citation

Greer, Daniel; Dey, Prithula; Kulig, Caitlin E. (2026). Suicide attempt and paranoia persisting for 28 days following heavy delta-9-tetrahydrocannabinolic acid and tetrahydrocannabinol use: A case report.. PCN reports : psychiatry and clinical neurosciences, 5(1), e70290. https://doi.org/10.1002/pcn5.70290