Cannabinology (MARIJUANA) Part 2 with Ziva Cooper and Caroline Melly

Episode Summary

Executive Summary: Allie Ward’s cannabis Part 2 with Dr. Ziva Cooper and Dr. Caroline Melley weighs listener questions against emerging research on smoking, vaping, edibles, anxiety, psychosis, ADHD, inflammation, CHS, and memory. The episode emphasizes that cannabis risks and benefits depend on dose, route, age, and individual vulnerability, and that many claims still need stronger human studies.

Main Topics: Cardiovascular and inhalation risks (Priority: 5/5): Smoking and vaping cannabis may harm blood vessels, hearts, and lungs; oral use also has risks. Edibles, metabolism, and overconsumption (Priority: 5/5): Edibles hit differently because THC is metabolized in the liver and can feel stronger and longer-lasting. Mental health, psychosis, and anxiety (Priority: 5/5): Cannabis can ease or worsen anxiety, and younger/heavy use raises concern for psychosis risk. CBD, inflammation, and neuroprotection (Priority: 4/5): CBD may help some symptoms, but evidence is limited and often requires high doses or better trials. Cannabinoid hyperemesis syndrome (Priority: 5/5): Heavy use can cause severe vomiting; hot showers and capsaicin may help, but abstinence is key. ADHD, autism, and neurodivergence (Priority: 4/5): Some neurodivergent users report symptom relief, yet controlled trials show mixed or limited benefit. Cannabis, stigma, and policy (Priority: 4/5): The episode traces racist drug-war history and argues stigma blocks honest patient-doctor conversations.

Key Arguments: Smoking cannabis is linked to worse vascular outcomes; inhaling anything produces combustion toxins. Edibles can cause more ER visits for acute psychiatric and cardiovascular symptoms than inhaled use. THC effects vary by dose: low can calm, high can trigger anxiety or paranoia. Younger cannabis use is associated with higher psychosis risk, especially in vulnerable people. CBD may help anxiety, but evidence is strongest at 300-600 mg doses, not typical dispensary doses. Cannabinoid hyperemesis syndrome is real and usually improves only with stopping cannabis. Current evidence for cannabis as cancer treatment is far too weak to replace standard care.

Data Points: Heart attack risk: twice as likely - Adults with a bleeding stroke who used cannabis in the last month were reported as twice as likely to die or have serious injury. Colorado THC use patterns: about half - Colorado BRFSS data cited in the episode said about half of THC users just smoke. Colorado THC use patterns: about 4% - Colorado BRFSS data cited in the episode said about 4% just use edibles. CBD anxiety dose: 300 milligrams - The episode cites CBD anxiety studies using 300 mg as a helpful dose. CBD anxiety dose: 600 milligrams - The episode cites CBD anxiety studies using 600 mg as a helpful dose. ADHD nasal spray trial dose: 2.5 milligrams each - The ADHD trial used a daily one-to-one THC/CBD nasal spray dose of about 2.5 mg each. CHS thermal relief: 105-110 Fahrenheit - Hot showers or heat around this range were described as sometimes relieving cannabinoid hyperemesis symptoms. CHS thermal relief: 43 degrees Celsius - The episode gives this Celsius equivalent for the hot-shower relief range. Capasaicin cream concentration: 0.025 - A CHS study used 0.025 capsaicin cream applied topically. THC in Rick Simpson oil: almost 90% THC - Rick Simpson Oil is described as an extremely concentrated cannabis extract. Heavy-use cognitive finding: lower brain activation - A JAMA report found heavy lifetime cannabis use associated with lower brain activation during a working memory task. Cannabis and COVID sample: 13,000 cases - A COVID study cited in the episode examined roughly 13,000 cases. Cannabis and stroke outcome: 50% - The EVALI discussion notes up to 50% of affected patients may require ICU care.

Pivotal Quotes: "you're going to get more risk, the more you use" — Dr. Ziva Cooper: On heavier cannabis use and adverse cardiovascular outcomes "there is no therapeutic that is all good" — Dr. Ziva Cooper: On the tradeoffs of cannabis effects, dose, and side effects "Smoking weed. Definitely not without its bodily consequences" — Allie Ward: A blunt summary after discussing vascular and lung harms

Implications: Cannabis research is expanding, but the biggest unresolved questions are long-term effects, dose-response, and safe use; listeners should disclose use to clinicians and be cautious with smoking and high-potency products.