Drug Facts in Media

Depression may not be one biological condition, but several distinct patterns of brain activity hiding under the same diagnosis. Researchers studying 263 people with depression identified five brain profiles, each showing different patterns of communication between brain regions and associations with symptoms such as anxiety, trauma, and substance abuse.

Researchers at Yale have identified a promising new approach to osteoarthritis that could do more than simply ease pain. The epilepsy drug lacosamide appears to block a protein involved in both pain signaling and cartilage destruction, helping damaged joints shift back toward repair in preclinical studies.

Cannabinoids may intensify anxiety by removing a natural brake on specific neurons in the brain’s fear center, particularly during stressful situations. In mice, shutting down those neurons sharply reduced cannabinoid-related anxious behavior.

A review of more than 265,000 people found that cannabis use was associated with higher rates of both committing violence and becoming a victim of it. The researchers say the link is significant but does not prove cannabis itself is the cause.

A massive MRI study found that Alzheimer’s disease, mild cognitive impairment, psychiatric disorders, and addiction are associated with distinct patterns of accelerated brain aging. The strongest effects appeared in Alzheimer’s and mild cognitive impairment, while ADHD and autism showed no significant overall difference.

Scientists discovered rare flavoalkaloids in Cannabis leaves for the first time, along with dozens of other phenolic compounds that had never been reported in the plant. The findings suggest that Cannabis leaves, often discarded as waste, may contain a surprisingly rich source of potentially useful chemicals.

Researchers have found evidence that long COVID may damage dopamine releasing neurons in the brain, potentially explaining persistent fatigue, low motivation, slowed movement, and memory difficulties. The discovery could lead to new treatments that target the brain's dopamine system.

A major Ontario study found 24 common medication chains in which one drug’s side effects can be mistaken for a new medical problem, leading to another prescription. Researchers say closer medication reviews, pharmacist involvement, and automated alerts could help prevent these potentially harmful prescribing cascades.

Scientists in Japan have identified a natural compound found in blueberries, grapes, and other berries that may help muscle cells burn excess fat instead of storing it. The compound, pterostilbene, reduced abnormal fat buildup in cultured mouse muscle cells by boosting fat breakdown and helping stabilize a key protein involved in fatty acid metabolism.

Early-life stress may physically alter how DNA is packaged in the brain, leaving stress-related genes primed to activate more easily years later. In mice, researchers were able to block this effect, preventing the heightened anxiety and stress sensitivity that otherwise appeared in adulthood.

A massive analysis involving more than 100 million people has found strong links between recreational drug use and stroke, including among younger adults. Cocaine was associated with nearly double the risk of stroke, amphetamines with more than double the risk, and cannabis with a 37% increase.

Ozempic-like drugs appear to weaken more than hunger—they may also reduce cravings for alcohol and other addictive substances. Scientists are increasingly tracing this effect to the lateral septum, a brain region that helps connect memories and surroundings with rewarding experiences. Packed with GLP-1 receptors, it may act as a crucial control point between thinking about a reward and feeling compelled to pursue it. The discovery could open new approaches to treating addiction as well as obesity.

Frequent cannabis users may wake up with unusually high levels of the stress hormone cortisol, suggesting their daily stress rhythms could be disrupted. Researchers say the finding raises questions about whether using cannabis for stress relief might, over time, interfere with the very system that helps the body handle stress.

An intensive seven-day meditation retreat triggered striking changes across the brain and body, including shifts tied to neuroplasticity, immunity, metabolism, and natural pain relief. Participants also showed brain connectivity patterns resembling those associated with psychedelic experiences, suggesting that powerful altered states may be achievable without drugs.

Teens who start using cannabis may experience slower growth in memory, attention, language, and processing speed. Their abilities often developed normally at first, then began leveling off while nonusers continued improving. THC appeared to be the most likely driver, especially for worsening memory.

A prescription form of THC helped many people with PTSD escape recurring trauma-related nightmares, with more than one-third reporting that the nightmares disappeared completely after ten weeks. The results could point toward a long-awaited treatment for one of PTSD’s most distressing and stubborn symptoms.

Newer oral drugs related to semaglutide medications such as Ozempic reduced pleasure-driven eating in mice by quieting a deep brain reward circuit. The finding could open new avenues for understanding food cravings and potentially treating substance use disorder.

Heavy marijuana smoking may raise the risk of lung cancer and several head and neck cancers, according to growing research, but many important questions remain unanswered. Scientists are still trying to determine how much marijuana use is enough to significantly increase cancer risk. Edibles have not been linked to lung cancer so far, while the long-term effects of vaping marijuana and secondhand marijuana smoke are still being investigated.

Scientists at UCLA have linked long-term exposure to the pesticide chlorpyrifos with a sharply increased risk of Parkinson’s disease. People exposed to the chemical near their homes were more than twice as likely to develop the condition. Laboratory studies showed that chlorpyrifos damages dopamine neurons and interferes with the brain’s ability to remove toxic protein buildup.

Teens who use cannabis may face a substantially greater risk of developing serious mental health conditions, including psychotic and bipolar disorders, according to a study of more than 463,000 adolescents. Researchers found cannabis use often preceded these diagnoses by nearly two years, strengthening concerns about its long-term effects on developing brains.