🌎 Resumen en español · traducción automática
A medida que aumenta el uso de cannabis, los investigadores buscan entender qué constituye un uso problemático, especialmente considerando que el cannabis carece de normas sociales claras sobre la moderación, a diferencia del alcohol. Los médicos reportan un incremento de pacientes llegando a salas de emergencia con síntomas de intoxicación por cannabis, incluyendo el síndrome de hiperémesis cannabinoide, que se cuadriplicó entre adultos de 18 a 35 años entre 2016 y 2022. La investigación actual se enfoca en tres variables principales: la frecuencia de uso, la edad de inicio y la potencia de la droga, siendo especialmente urgente determinar cuánto es demasiado para el cerebro dado que el cannabis actual es mucho más potente que el de generaciones anteriores.
Traducción y resumen generados por IA a partir del artículo en inglés. Puede contener errores; consulte el texto original.
As cannabis use increases, “researchers are trying to understand what problematic use looks like and whether new habits and cultural norms could help prevent it,” Ariana Eunjung Cha reports for The Washington Post.
Unlike alcohol, which Cha reports has social rules around what moderation looks like, cannabis, or marijuana, has few such rules. And this, she writes, comes at a time when “doctors report increasing numbers of patients arriving in emergency rooms with confusion, paranoia, rapid heartbeats, dizziness and other signs of cannabis intoxication,” including cannabinoid hyperemesis syndrome, a condition involving severe, repeated vomiting, which one study shows quadrupled among adults ages 18 to 35 between 2016 and 2022.
1. Shifting potency: Because today’s cannabis is far more potent than the products used by previous generations, Cha reports: “Some scientists think highly concentrated THC, or tetrahydrocannabinol, the compound primarily responsible for cannabis’s psychoactive effects, may produce larger dopamine surges and more profound disruptions in perception and salience processing — the brain’s ability to determine what deserves attention.”
2. Overstated mental health benefits: Cha reports that research published in JAMA Internal Medicine and in the Lancet casts doubts on the use of cannabis for mental health conditions, with researchers in the JAMA study warning that the use of cannabis for such conditions “demonstrates substantial risks of adverse effects” and the Lancet researchers concluding, ““Given the scarcity of evidence, the routine use of cannabinoids for the treatment of mental disorders … is currently rarely justified.”
3. Cognitive effects may vary by age: Citing several studies, including a 2024 study published in JAMA Network Open and a 2025 study published in JAMA Network Open, Cha reports, “One of the more surprising shifts in cannabis research is that moderate use in adulthood may not impair cognition nearly as much as scientists once feared.
4. Teenage brains appear most vulnerable: “Studies going back decades have found that adolescents who use cannabis regularly tend to earn lower grades and graduate from high school at lower rates, a pattern sometimes referred to as ‘amotivational syndrome’” Cha reports.
5. Chance of a cognitive rebound: Taking a temporary pause in cannabis use is common among regular users, often because the body can become less responsive to THC. Cha reports that small studies have looked at this and suggest that “for some people, reducing or stopping cannabis use may allow some cognitive function to rebound over time.” However, she adds, “These findings do not necessarily mean that all cannabis-related brain changes are reversible, nor do they establish how long recovery may take.”
6. Signs of protecting older brains: At this time, Cha reports that research on whether certain cannabinoids can help protect aging brains is early and has not included human trials. That said, she writes that findings from a 2024 study from the Salk Institute have shown promise but are in the early stages.
7. Setting boundaries matters: “Researchers studying cannabis have noted that while some users develop problematic patterns of use, most do not,” which Cha reports could stem from the long-standing “drug, set and setting” theory that argues “a person’s experience with a substance is shaped not only by the drug itself but also by their mindset (“set”) and the environment in which they use it (“setting”).”
