Synthetic Cannabinoid "Spice" Products Sent Six Patients to the ER With Seizures and Hallucinations | Research

The takeaway

Six patients presented to an emergency department after using Spice (synthetic cannabinoid) products, with two experiencing seizures and two reporting hallucinations, though most recovered with brief observation.

Read this if you or someone you know is considering or has used synthetic cannabinoid products.

Seizures occurred in 2 of 6 patients, an effect rarely seen with natural cannabis

What the researchers found

Six patients presented to an emergency department over three months after using Spice products. All but one had tachycardia (elevated heart rate). Two patients were admitted after reporting seizures, and two experienced hallucinations. The average observation time was 2.8 hours, and no patients with seizures had recurrent episodes.

The case series highlighted that synthetic cannabinoids are chemically distinct from natural cannabis and produce different, often more severe clinical effects. The legal status of these compounds was still being determined, creating challenges for both healthcare providers and law enforcement.

Why it matters

Synthetic cannabinoids were marketed as a legal alternative to marijuana but carry significantly greater health risks. This case series provided early clinical documentation that these products cause effects not typically seen with natural cannabis, including seizures and significant tachycardia.

The numbers in context

6 cases over 3 months. 5 of 6 had tachycardia. 2 admitted for seizures. 2 had hallucinations. Average ED observation: 2.8 hours. No recurrent seizures.

How the study worked

Retrospective case series reviewing emergency department presentations over a 3-month period where patients reported Spice drug use as chief complaint. Clinical data, symptoms, treatments, and outcomes documented.

What this study cannot tell us

Case series of only 6 patients cannot characterize the full spectrum of effects. Self-reported drug use may be inaccurate. The specific synthetic cannabinoid compounds were likely not identified. No analytical confirmation of the substances used. The 3-month window and single facility limit generalizability.

How to read the evidence

Small case series from a single emergency department; preliminary evidence for clinical presentation.

When this study was published

Published in 2013. Synthetic cannabinoid-related emergencies have increased dramatically since, with more potent compounds emerging.

The bigger picture

This case series was part of a wave of early clinical reports documenting the harms of synthetic cannabinoids. These compounds would go on to cause thousands of emergency department visits annually, with formulations becoming progressively more dangerous as manufacturers stayed ahead of legislation.

Questions still open

How do the health effects of synthetic cannabinoids compare to natural cannabis? Why do synthetic cannabinoids cause seizures when natural cannabis typically does not? Are current regulations keeping pace with the rapidly evolving synthetic cannabinoid market?

Common questions

Why are synthetic cannabinoids more dangerous than marijuana?

Synthetic cannabinoids are full agonists at CB1 receptors, meaning they activate the receptor much more strongly than THC (a partial agonist). They are also applied to plant material in unknown concentrations, creating "hot spots" of extreme potency. This explains effects like seizures and severe tachycardia that are not typical of natural cannabis.

Are Spice products legal?

At the time of this study (2013), the legal status was still being determined. Since then, many specific synthetic cannabinoid compounds have been banned, but manufacturers continuously create new chemical variants to stay ahead of legislation. The safest assumption is that these products carry serious and unpredictable health risks regardless of legal status.

Read the original research

Synthetic cannabinoid intoxication: a case series and review.

The Journal of emergency medicine, 44(2), 360-6

View on PubMed ↗Publisher’s paper ↗

Citation

Harris, Carson R; Brown, Ashley. (2013). Synthetic cannabinoid intoxication: a case series and review.. The Journal of emergency medicine, 44(2), 360-6. https://doi.org/10.1016/j.jemermed.2012.07.061