#Cannabis

Three years after breaking new ground as the first Asian country to decriminalize cannabis, Thailand is now reining in its green ambitions amid a whirlwind of controversy, regulatory confusion, and social challenges. Effective from this week, new laws require Thais and tourists alike to have a doctor’s prescription to purchase cannabis, sharply curtailing the euphoric “green rush” that swept the nation and turned once-conservative streets into thriving hubs for weed enthusiasts and curious travelers alike. The abrupt policy turn aims to restore some order to a marijuana industry that, by many accounts, spun out faster than policymakers or the public could process, igniting national debate over its economic contributions, social costs, and the pathway forward.

A new wave of scientific research challenges some of the most common beliefs about using cannabis to treat health problems such as pain, insomnia, and mental health symptoms like paranoia, highlighting important lessons for Thai readers at a time when medical marijuana access is rapidly expanding in Thailand and across Asia.

The use of cannabis as medicine has surged since Thailand became the first Southeast Asian country to decriminalize cannabis plants in 2022—a move initially aimed to stimulate medical innovation and boost the economy through wellness tourism. But as ever more Thais purchase cannabis products online and at street dispensaries, fresh global research underscores that the effectiveness—and risks—of cannabis for many health problems are far from settled, with strong implications for the Thai public, patients, and caregivers (Washington Post, Medical News Today).

Amid rising global interest and legal reforms surrounding cannabis, recent research is painting a complex picture of its true effects on common health problems such as insomnia, chronic pain, and anxiety. A series of large-scale studies from Australia to the United States highlight encouraging long-term improvements in quality of life for patients with stubborn conditions, but also raise serious caution about potential mental health risks such as paranoia, psychosis, and increased risk of psychiatric disorders.

A wave of new research is drawing unprecedented connections between marijuana use and serious cardiovascular risks, overturning widely-held beliefs that cannabis is relatively harmless. Large-scale studies published in mid-2025 point to a significantly increased risk of heart attack, stroke, and cardiovascular death among users of marijuana—a finding that experts caution should inform personal and public health choices in Thailand and worldwide (The New York Times; Fox News; Virgin Islands Consortium).

As marijuana use undergoes rapid normalization, with legal medical and recreational access expanding across the world, researchers warn that its cardiac dangers are becoming clearer and more urgent. In Thailand, where medicinal cannabis was legalized in 2022 and recreational use remains in legal limbo, these findings arrive as lawmakers and public health officials debate the way forward in marijuana regulation and education (CNN).

As more older adults in Thailand and around the world turn to cannabis to address chronic pain, insomnia and mental health struggles, a surge of recent research is revealing that age dramatically increases the health risks posed by this once-taboo plant. With the global push towards cannabis legalization and growing acceptance for therapeutic use, experts are warning that older bodies and minds are particularly vulnerable to the potent effects of modern cannabis products—placing Thailand’s rapidly aging population at risk of unanticipated harm (NY Times, Seattle Times).

The latest findings from US-based research show that marijuana use among seniors has surged to unprecedented levels, sparking both celebration and concern within the medical community. According to multiple 2025 reports and studies, the rate of cannabis use among adults aged 65 and older rose by nearly 46% from 2021 to 2023, with approximately one in every seven seniors now reporting cannabis use in the past month. This dramatic shift, up from just 1 in 100 twenty years ago, reflects not only changing generational attitudes towards cannabis but also signals new public health challenges and opportunities for societies embracing an aging population—Thailand included (Axios, FOX News, WGAU Radio).

A growing wave of scientific research is sounding the alarm on the increasing health risks linked to cannabis use among older adults, as usage climbs to record levels amidst expanded legalization and shifting social attitudes. The latest analysis, published in the Journal of the American Medical Association (JAMA), reveals a sharp uptick in cannabis consumption by individuals aged 65 and older, igniting urgent debate among health experts about the safety, efficacy, and regulation of cannabis use in Thailand’s rapidly aging society.

A wave of fresh research is prompting Thai psychiatrists and families to reconsider long-held assumptions about psychosis, as scientists explore the crucial differences between substance-induced and primary psychotic disorders. This emerging body of evidence, highlighted in a recent Medscape report, could help guide better diagnosis, tailored treatment, and more hopeful outcomes for patients across Thailand.

Psychosis, a condition marked by a loss of contact with reality—often via hallucinations or delusions—has long been categorized into those primarily caused by a psychiatric illness, like schizophrenia, and others triggered by substance use, such as methamphetamine (“ya ba”) or cannabis. Understanding whether symptoms are “primary” (intrinsic to psychiatric illness) or “substance-induced” (caused by drug or alcohol use) shapes every aspect of medical care, but until now, the true distinctions have often been blurred, fueling debates among clinicians and researchers worldwide.

A groundbreaking study has revealed that individuals who use cannabis heavily enough to require emergency hospital care are at a significantly elevated risk of developing dementia within five years, sparking debate among health experts and the public at large, including in Thailand. According to the research, which involved more than six million Canadians, nearly 5% of those admitted to emergency departments or hospitals due to cannabis-related issues were diagnosed with dementia within five years. Alarmingly, this figure rose to 19% within ten years after such incidents, highlighting a concerning new link between cannabis use and long-term brain health (Local 12, The New York Times, CNN, JAMA Neurology).

A new wave of fitness enthusiasts is challenging the long-standing stereotype of the “lazy stoner,” as growing evidence—and candid testimony—suggests that cannabis is helping people exercise, find joy in workouts, and perhaps even unlock their own version of a “runner’s high.” As recently reported by Yahoo! News, and supported by emerging research, people like Mark, a father in his 40s, are using cannabis products such as vape pens or edibles to make their training more enjoyable and less monotonous. Mark credits cannabis with helping him complete the demanding months of training for his first marathon, saying, “I definitely could have run the marathon without the marijuana, but I don’t know how easily I could have completed the training without it” (Yahoo! News).

A surprising new wave of research is challenging the stereotype of the lethargic “stoner” by revealing an unexpected trend: cannabis users are increasingly pairing marijuana with exercise to boost motivation, enjoyment, and even achieve the coveted “runner’s high.” This new approach, highlighted in a recent article by Salon.com (source), reflects a growing body of scientific studies suggesting that cannabis, when used thoughtfully, might actually help some people embrace a more active lifestyle—contrary to decades-old assumptions linking marijuana to inactivity.

A wave of recent studies is drawing global attention to a striking trend: the tetrahydrocannabinol (THC) content in cannabis – the primary compound responsible for the drug’s psychoactive “high” – is now far more potent than in previous decades. According to new data reported by Axios, the average THC level in U.S. cannabis has quadrupled since the 1990s, signaling both significant changes for cannabis users and new health concerns for society at large Axios. For Thai readers—whether policymakers, healthcare providers, students, or parents—the global surge in high-potency cannabis raises important questions about public health, legal approaches, and cultural attitudes toward marijuana.

A recent study published this week has found that older adults who seek medical help for cannabis use may face a significantly higher risk of developing dementia, highlighting urgent concerns as marijuana use rises among aging populations worldwide—including here in Thailand. This research, first reported by The New York Times, observed a meaningful connection between cannabis use disorder and subsequent dementia diagnosis in individuals aged 55 and older, prompting both health professionals and policymakers to re-examine guidelines and public health messaging regarding cannabis, especially in countries like Thailand that are reconsidering their cannabis policies.