Health
Major cannabis study finds little proof for popular medical claims, flags big dangers
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Cannabis has been linked to some significant medical benefits, but recent research calls those into question.
A major new analysis published in JAMA examined more than 2,500 scientific papers from the last 15 years, including other reviews, clinical trials and guidelines focused on medical marijuana.
“While many people turn to cannabis seeking relief, our review highlights significant gaps between public perception and scientific evidence regarding its effectiveness for most medical conditions,” Dr. Michael Hsu of University of California – Los Angeles (UCLA) Health Sciences, author of the study, said in a press release.
Many medical claims about cannabis are not supported by strong scientific evidence, according to a comprehensive review published in JAMA. (iStock)
The researchers — led by UCLA with contributions from Harvard, UC San Francisco, Washington University School of Medicine and New York University — set out to determine how strong the research is on the effectiveness of medical cannabis and to offer evidence-based clinical guidance.
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The review found that evidence supporting most medical uses of cannabis or cannabinoids is limited or insufficient, the release stated.
“Whenever a substance is widely used, there is likely to be a very wide set of outcomes,” Alex Dimitriu, MD, double board-certified in Psychiatry and Sleep Medicine and founder of Menlo Park Psychiatry & Sleep Medicine, told Fox News Digital.
“Cannabis is now used by about 15 to 25% of U.S. adults in the past year, for various reasons ranging from recreational to medicinal. This study points to the reality that this widely used substance is not a panacea,” said Dimitriu, who was not involved in the study.
There are very few conditions for which cannabinoid therapies have clear, well-established benefits backed by high-quality clinical data, according to the researchers.
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The strongest evidence supports FDA-approved cannabinoid medications for treating specific conditions, including HIV/AIDS-related appetite loss, chemotherapy-induced nausea and vomiting, and certain severe pediatric seizure disorders.
The review identified significant safety concerns, with high-potency cannabis use among young people linked to higher rates of mental health issues. (iStock)
For many other conditions that are commonly treated with cannabis — such as chronic pain, insomnia, anxiety or post-traumatic stress disorder — evidence from randomized trials did not support meaningful benefit.
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The analysis also examined safety concerns — in particular, how young people using high-potency cannabis may be more likely to suffer higher rates of psychotic symptoms and anxiety disorder.
Daily inhaled cannabis use was also linked to increased risks of coronary heart disease, myocardial infarction (heart attack) and stroke when compared with non-daily use.
Daily inhaled cannabis use is associated with increased cardiovascular risks, including coronary heart disease, heart attack and stroke. (iStock)
Based on these findings, the review emphasizes that clinicians should weigh potential benefits against known risks when discussing cannabis with patients.
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The authors suggest that clinicians screen patients for cardiovascular risk, evaluate mental health history, check for possible drug interactions and consider conditions where risks may outweigh benefits.
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They recommend open, realistic conversations and caution against assuming that cannabis is broadly effective for medical conditions.
The review highlights the need for caution, urging clinicians to weigh risks, screen patients appropriately and avoid assuming cannabis is broadly effective. (iStock)
“Patients deserve honest conversations about what the science does and doesn’t tell us about medical cannabis,” Hsu said.
This article is a narrative review rather than a systematic review, so it did not use the strict, standardized methods that help reduce bias in how studies are selected and evaluated, the researchers noted.
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The review notes further limitations, including that some evidence comes from observational research rather than randomized trials, which means it cannot establish cause and effect.
The trial results also may not apply to all populations, products or doses.
Health
What to do if someone is having a stroke, after Jill Biden revealed debate-night fears
Jill Biden says Joe’s debate performance made her wonder if he had a stroke
Former first lady Jill Biden revises her account of former President Joe Biden’s disastrous 2024 debate, now alleging she feared he was suffering a stroke. This new statement from the first lady contrasts sharply with her earlier public affirmations of his performance. Contributor Ben Domenech scrutinizes the timing and motivations behind this sudden shift.
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Former first lady Jill Biden has expressed her concerns about former President Joe Biden’s health status, noting that she feared he was having a stroke during a 2024 debate against President Donald Trump.
Biden struggled his way through the performance, with long periods of silence, confused facial expressions and stammered speech. In a recent interview with CBS, Jill Biden commented that she was “frightened.”
“I don’t know what happened,” she said. “I mean, when I watched it, I thought, ‘Oh my God, he’s having a stroke,’ and it scared me to death.”
JILL BIDEN SAYS SHE THOUGHT JOE WAS HAVING A STROKE DURING HIS DISASTROUS 2024 DEBATE PERFORMANCE
A stroke occurs when there is bleeding in the brain or when blood flow to the brain is blocked, according to Mayo Clinic.
Identifying a stroke may be difficult, as symptoms can vary.
Stroke symptoms can include balance loss, weakness, slurred speech, face drooping, confusion and severe headaches. (iStock)
The American Stroke Association (ASA) identifies the following key warning signs, using the acronym “B.E. F.A.S.T.”
- B – Balance loss
- E – Eye (vision) changes
- F – Face drooping
- A – Arm weakness
- S – Speech difficulty
- T – Time to call 911
In a situation in which someone could be having a stroke, “the only” thing to do is to call 911, Fox News senior medical analyst Dr. Marc Siegel told Fox News Digital.
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The doctor emphasized other symptoms to watch for, including weakness on one side, slurred speech, difficulty processing information and confusion.
The ASA also warns that severe headaches can also be a sign of stroke.
At the first sign of stroke, 911 should be contacted immediately, as 1.9 million brain cells die every minute that a stroke goes untreated. (iStock)
Siegel advised against giving the person an aspirin, as it could worsen bleeding in the brain if that is the cause of stroke.
With an ischemic stroke, that type of medication could be helpful.
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The ASA says 1.9 million brain cells die every minute that a stroke goes untreated, which means earlier treatment leads to higher survival rates and lower risk of disability.
“In medicine, we use the term ‘time is brain,’” Siegel said. “This means that the faster you bring the patient to the emergency room, the faster they can receive emergency treatment if indicated to reopen the blocked artery in the brain, if there is one.”
Brain imaging should be done within the first several hours after seeking medical attention for a stroke, according to a top physician. (iStock)
Brain imaging can also be done on arrival at the ER, which should occur within the first several hours, Siegel said.
Anyone who is experiencing a stroke should not drive themselves to the hospital, according to the CDC. Instead, the person should get a ride or call 911 — as treatment begins inside the ambulance.
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About 80% of strokes are preventable, the American Heart Association states.
Prevention includes managing high blood pressure, diabetes, atrial fibrillation and other risk factors.
One in four survivors have another stroke within the next five years, per CDC data, so those at higher risk should prepare a prevention and treatment plan.
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Fox News Digital’s Alexander Hall contributed to this report.
Health
Controversial drug delivered rapid relief for severe depression in just hours
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Top stories
→ Single infusion of controversial drug changed severe depression symptoms within hours
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Health
Single infusion of controversial drug changed severe depression symptoms within hours, study finds
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People experiencing severe depression with suicidal symptoms may not have to wait weeks for traditional antidepressants to take effect.
A recent review suggests that a single intravenous ketamine infusion can provide rapid relief for some patients.
Originally developed as an anesthetic, ketamine is a medicine that can reduce pain and, in some cases, help treat depression, but it can also be misused as a recreational drug, experts warn.
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Researchers from the University of Connecticut School of Medicine reviewed 26 clinical trials that included more than 1,100 patients. Approximately 626 received ketamine and 540 served as controls who did not take the drug.
Most of the trials included patients with major depressive disorder, but 11.5% included those with bipolar depression and 7.7% included people with both unipolar and bipolar depressive diagnoses.
A recent review suggests that a single intravenous ketamine infusion can provide rapid relief for some patients with treatment-resistant depression. (iStock)
Compared to a placebo, a single treatment significantly reduced depression in just four hours and dramatically lowered suicidal thoughts within 24 hours, the study found.
Patients reported fewer depressive symptoms after a week and reduced suicidal thoughts for up to a month after one ketamine infusion. Those who received repeated ketamine infusions showed a similar reduction of suicidal and depressive symptoms at the end of the treatment.
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The most common adverse effects of ketamine – including headaches, numbness, dissociation (“out of body” experiences), nausea, dizziness and visual disturbances – were temporary and resolved within hours of the infusion.
Rarer, more serious side events included hospitalization, suicide attempts and suicide, but most were unrelated to ketamine, the review stated.
The analysis was published in May in JAMA Psychiatry.
Treatment-resistant depression
Major depressive disorder is a formal psychiatric diagnosis affecting approximately 280 million people globally, according to recent research.
Effective treatment involves a combination of therapy and medication, frequently antidepressants. However, for a few patients, symptoms do not respond to multiple therapies, a condition known as treatment-resistant depression, doctors say.
“When all existing treatment options fail, patients with severe depression could consider ketamine infusions.”
These patients are at a higher risk of very serious, sometimes tragic consequences, including suicidal thoughts, suicide attempts and death.
“When all existing treatment options fail, patients with severe depression could consider ketamine infusions,” lead author Taeho Greg Rhee, PhD, of the University of Connecticut School of Medicine, told Fox News Digital. “This is still a safer option when compared to electroconvulsive therapy (ECT).”
Compared to a placebo, a single treatment significantly reduced depression in just four hours and dramatically lowered suicidal thoughts within 24 hours, the study found. (iStock)
Traditional antidepressants stabilize mood by slowly elevating serotonin levels in the brain, but it can take weeks for the full effect to be achieved.
Ketamine, in contrast, works rapidly by blocking glutamate, a neurotransmitter that can impact emotions negatively when levels are too high in the brain, according to Cleveland Clinic.
Implications for care
The authors say their findings have two important potential clinical applications.
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First, ketamine’s rapid effects can be a life-saving treatment in the emergency room for patients presenting with suicidal ideation.
Experts caution that the medication should only be administered in closely monitored settings, such as clinics, to ensure safe treatment. (iStock)
Second, the effects of a single ketamine infusion are relatively short-lived – as almost all patients relapsed with depressive symptoms after a single infusion – so those with treatment-resistant depression will need repeated sessions.
“While intravenous ketamine is not yet FDA-approved for treating depression, it may still be used with off-label indications for those with severe depression and/or with a high risk of suicidal behaviors,” said Rhee.
Experts urge caution despite promise
Dr. Lama Bazzi, a psychiatrist in private practice in New York City, has had several patients receive ketamine infusions.
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“For a small subset of patients in a major depressive episode or struggling with suicidal thoughts, intravenous ketamine can be genuinely lifesaving,” Bazzi, who was not involved in the study, told Fox News Digital. “The relief they experience is almost immediate, offering them distance from the intensity of their emotions.”
However, she cautions that the medication should only be administered in closely monitored settings, such as clinics, to ensure safe treatment.
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Ketamine is not a panacea, Rhee agreed, warning of the potential risk of abuse and addiction.
“It should only be used medically,” he advised.
Ketamine’s rapid effects can be a life-saving treatment in the emergency room for patients presenting with suicidal ideation, some experts claim. (Getty Images)
Dr. Marc Siegel, Fox News senior medical analyst, noted in previous comments to Fox News Digital that ketamine is increasingly being used to treat severe depression, but emphasized that it should be administered under careful medical supervision because of its potential risks.
Study limitations
Although the studies compared ketamine with a placebo, some patients may have realized they were receiving the drug. This could have influenced how they reported their symptoms and how effective they perceived the treatment to be, according to the researchers.
“It should only be used medically.”
Another limitation is the small sample size of the studies, which could make the effects seem disproportionately magnified.
Also, as this was a review of many different studies, it is challenging to apply the findings to the general population, the researchers noted.
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“While long-term outcomes have not been studied, I believe that when patients are severely depressed or suicidal, ketamine is sometimes the only choice that almost always works,” Bazzi added.
Anyone interested in exploring alternative depression treatments should first consult a doctor.
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