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Toxicology – Synthetic Cannabinoids (“Spice,” “K2”)
Source
Synthetic cannabinoids are laboratory-made compounds sprayed onto plant material and sold as “herbal incense” or “smoking blends.” These products are often marketed in colorful packaging and labeled “not for human consumption,” despite being used recreationally.
Typical Presentation
Users may develop symptoms shortly after smoking these substances. A common presentation includes sudden onset of anxiety, paranoia, and altered perception, sometimes progressing to severe psychological distress.
Clinical Features
While some effects resemble natural cannabis, synthetic cannabinoids are more likely to cause severe neuropsychiatric symptoms such as intense anxiety, paranoia, hallucinations, delusions, and psychosis. Other findings may include tachycardia, agitation, and confusion. Serious complications such as seizures, myocardial infarction, acute kidney injury, and self-harm have been reported.
Mechanism of Action
These compounds act on cannabinoid receptors (CB1 and CB2), similar to THC. However, their potency, receptor affinity, and concentration vary widely, leading to unpredictable and often more severe effects compared to natural cannabis.
Management
Treatment is supportive. Benzodiazepines are commonly used to manage agitation, anxiety, tachycardia, and hallucinations.
Key Points
Source
Synthetic cannabinoids are laboratory-made compounds sprayed onto plant material and sold as “herbal incense” or “smoking blends.” These products are often marketed in colorful packaging and labeled “not for human consumption,” despite being used recreationally.
Typical Presentation
Users may develop symptoms shortly after smoking these substances. A common presentation includes sudden onset of anxiety, paranoia, and altered perception, sometimes progressing to severe psychological distress.
Clinical Features
While some effects resemble natural cannabis, synthetic cannabinoids are more likely to cause severe neuropsychiatric symptoms such as intense anxiety, paranoia, hallucinations, delusions, and psychosis. Other findings may include tachycardia, agitation, and confusion. Serious complications such as seizures, myocardial infarction, acute kidney injury, and self-harm have been reported.
Mechanism of Action
These compounds act on cannabinoid receptors (CB1 and CB2), similar to THC. However, their potency, receptor affinity, and concentration vary widely, leading to unpredictable and often more severe effects compared to natural cannabis.
Management
Treatment is supportive. Benzodiazepines are commonly used to manage agitation, anxiety, tachycardia, and hallucinations.
Key Points
- Synthetic cannabinoids are typically not detected on standard drug screening tests.
- Numerous compounds exist, including JWH-018, JWH-073, CP-47,497, HU-210, and cannabicyclohexanol, contributing to variable toxicity profiles.
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