@grinspoon.bsky.social
Primary Care Doc. & #cannabis specialist Harvard Med. Substack: https://drpetergrinspoon.substack.com Books: Free Refills, Seeing Through the Smoke, Aging Well with Cannabis and CBD
Check out my latest blog. How do you know when your drug use is addictive or if it is reasonable? How does it affect your family? What are the guardrails? How do you distinguish "safe" drug use from #addiction?
drpetergrinspoon.substack.com/p/recreation...
'Results highlight that #cannabis may influence brain health differently across the lifespan, potentially offering protective effects in older age while posing risks earlier in development.'
pubmed.ncbi.nlm.nih.gov/41379083/
Check out my latest blog. How do you know when your drug use is addictive or if it is reasonable? How does it affect your family? What are the guardrails? How do you distinguish "safe" drug use from #addiction?
drpetergrinspoon.substack.com/p/recreation...
Among horrible things Trump doing (trying to destroy elections & our democracy, torturing immigrants, ICE shoot innocent protestors, destroying alliances, ballooning our debt), this is diaster: to make his oil/coal friends rich, he's destroying our climate
www.nytimes.com/2026/02/09/c...
I counsel against using #cannabis during pregnancy (unless under a few, extreme conditions...), but the data on harms is very mixed. This study shows no measurable harms with respect to ED visits, or developmental delay.
www.academicpedsjnl.net/article/S187...
Big topic: is #cannabis addictive? How addictive? What are we doing wrong in the field of #addiction medicine. Check out my blog.
drpetergrinspoon.substack.com/p/is-cannabi...
Check out one of my most popular video on the myriad uses of #cannabis in seniors
(I have book coming out on this topic on 5/5/26)
www.youtube.com/watch?v=jGJy...
New blog:
In what universe does it make sense for Big Cannabis to bankroll Trump? When corporate cannabis aligns with anti-democratic power, it betrays the patients and activists who fought for legalization. We need legalization without corruption.
drpetergrinspoon.substack.com/p/big-cannab...
'Findings suggest cannabis beverages may support alcohol substitution and reduce alcohol-related harms, offering a promising alternative for individuals seeking to lower alcohol intake.'
#cannabis #harmreduction
www.tandfonline.com/doi/full/10....
Important article about upcoming elections:
www.nytimes.com/2026/01/31/o...
Another study suggesting that people are substituting #cannabis for #alcohol, which is a critical way to accomplish harm reduction.
www.tandfonline.com/doi/abs/10.1...
Honored to be included in this interesting Guardian article -- the world is changing! (for the better); though: use #cannabis with caution (and not with alcohol...)
www.theguardian.com/us-news/2026...
New blog:
In what universe does it make sense for Big Cannabis to bankroll Trump? When corporate cannabis aligns with anti-democratic power, it betrays the patients and activists who fought for legalization. We need legalization without corruption.
drpetergrinspoon.substack.com/p/big-cannab...
Off topic for me -- but we all need to push back against ICE, Trump's version of the Gestapo, which is harming (and now murdering) innocent civilians/peaceful protesters; most of the immigrants peaceful too - Trump is destroying fabic of our democracy.
www.pbs.org/newshour/nat...
As long as people are careful not to consume too much THC, and don't plan on driving, #cannabis drinks are significantly safer than alcohol (which was associated with 178,000 deaths last year); this is harm reduction.
www.nytimes.com/2026/01/25/b...
The nature of today’s unregulated drug supply has changed dramatically. In this video, I explain the risks of pressed pills and fentanyl contamination, and discuss what this means for harm reduction and drug policy.
Watch the full video here: lnkd.in/eXQ6cNbR
Excited to speak on Feb. 9th. at 12:30, with wonderful panel, at The Petrie-Flom Center for Health Law Policy, Biotechnology, and Bioethics at Harvard Law School on #cannabis policy! (and I'm at MIT addiction bootcamp today).
petrieflom.law.harvard.edu/events/detai...
Shocking!
'US drug policy does not align with experts’ rankings of drug harms: a multi-criteria decision analysis'
#cannabis was in the middle and mushrooms were the least dangerous...has no relationship to how these substances are scheduled in CSA.
link.springer.com/article/10.1...
'Acute migraine treatment with 6% THC + 11% CBD was superior to placebo at 2-h post-treatment with sustained benefits at 24 and 48 h.'
(ramdomized, double-blind, placebo controlled)
#cannabis #migraine
pubmed.ncbi.nlm.nih.gov/41469488/
The nature of today’s unregulated drug supply has changed dramatically. In this video, I explain the risks of pressed pills and fentanyl contamination, and discuss what this means for harm reduction and drug policy.
Watch the full video here: lnkd.in/eXQ6cNbR
Before I was a doctor, I was a kid watching my older brother Danny endure chemo for leukemia. Cannabis was the only thing that stopped the nausea & vomiting before he died at 16. It was the '70s, and using it meant breaking the law. Watch the full video at youtu.be/-MWHVhlIHwk
10.01.2026 18:10 — 👍 6 🔁 2 💬 0 📌 0
Interesting results:
'Older Adults’ Perspectives on and Experiences with Cannabis Use: Results From the 2024 National Poll on Healthy Aging'
(this is what my upcoming book is about, #cannabis use in seniors, how to use it safely...)
pmc.ncbi.nlm.nih.gov/articles/PMC...
This is so far beyond acceptable, and needs to stop;
ICE is a fascist army that needs to be dismantled.
'agents have broken hospital protocol, refused to provide documentation and, in some cases, gotten into shouting matches with doctors and nurses.'
www.nytimes.com/2026/01/19/u...
Please check out my latest blog, informed from my recent work in our low-threshold #addiction clinic at MGH.
'The world has never been so dangerous for drug users -
Pressed Pills and Contaminated Cocaine'
(our drug supply is poisoned with #fentanyl etc.)
drpetergrinspoon.substack.com/p/the-world-...
As if the fentanyl supply wasn't contaminated enough with xylazine, this new cantaminant, medetomadine causes not so much overdoses but life-threatening withdrawal.
(we need to decriminalize and regulate our drug supply...
#addiction
www.nytimes.com/2025/12/15/h...
good article:
'A Perspective on Psychedelics as Treatments for Addictions'
#psychedelics
www.jsad.com/doi/10.15288...
Please check out my latest blog, informed from my recent work in our low-threshold #addiction clinic at MGH.
'The world has never been so dangerous for drug users -
Pressed Pills and Contaminated Cocaine'
(our drug supply is poisoned with #fentanyl etc.)
drpetergrinspoon.substack.com/p/the-world-...
HNY!!!! What a zany, wonderful year! Check out my year in review.
#cannabis #psychedelics #addiction
drpetergrinspoon.substack.com/p/what-i-lea...
Good news: 'Federal Health Official Says Teens Are Finding It Harder To Access Marijuana Even As Legalization Spreads, Contrary To Opponents’ Fears'
(double standard with #cannabis: if teen rates were rising, this would be front page news...)
www.marijuanamoment.net/federal-heal...
RIP Bob Weir! It was great to meet you when I was working at @Greenpeace (before medical school...) -- thanks for all the great memories!
www.nytimes.com/2026/01/11/a...