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Dosing data limited to oral reports and animal studies. Threshold effects occur below 1 mg but precise threshold dose not established in available literature. Significant variation in potency between batches and synthesis methods reported for synthetic cannabinoids.
At least one case of JWH-018 dependence has been reported following daily use over eight months. As a full CB1 agonist with indirect dopaminergic activity, JWH-018 may have greater reinforcing potential than cannabis, though individual susceptibility varies.
Withdrawal symptoms have been reported following prolonged daily use and were described as more severe than those experienced from cannabis dependence.
One death has been attributed to JWH-018, with the coroner citing 'drug toxicity and organ failure' as the cause in a South Carolina college basketball player in 2011. No formal lethal dose thresholds have been established.
May cause intense anxiety and agitation. Psychotic relapses and anxiety symptoms have been reported in patients with pre-existing mental illness following inhalation. Due to concerns about psychosis induction in vulnerable individuals, it is recommended that people with risk factors for psychotic disorders, such as a past or family history of psychosis, not use synthetic cannabinoids.
Seizures and convulsions have been reported in rare cases, though causation has not been definitively established.
JWH-018 was synthesized by John W. Huffman, an organic chemist at Clemson University, as part of his research into compounds affecting the endocannabinoid system. The compound's designation derives from Huffman's initials.
Classified under the Misuse of Drugs Act at the end of 2009. JWH-018 was among the first synthetic cannabinoids to be formally controlled in the UK, prompted by its widespread availability in products marketed as 'Spice' or herbal incense.
Placed under federal control during the summer of 2012. Prior to scheduling, JWH-018 was sold openly in head shops and online under the guise of incense or potpourri labeled 'not for human consumption' to circumvent drug laws.
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