Marijuana may up heart attack, stroke risk-if you smoke 2-9 Oz. a week

  • by NORML May 13, 2008

    This from NORML Podcaster Russ Belville at the NORML Daily Audio Stash blog

    Marijuana may up heart attack, stroke risk: study | Health | Reuters
    WASHINGTON (Reuters) – Heavy marijuana use can boost blood levels of a particular protein, perhaps raising a person’s risk of a heart attack or stroke, U.S. government researchers said on Tuesday.

    Levels of a protein called apolipoprotein C-III were found to be 30 percent higher in the marijuana users compared to the others. This protein is involved in the body’s metabolism of triglycerides — a type of fat found in the blood — and higher levels cause increased levels of triglycerides.

    High levels of triglycerides can contribute to hardening of the arteries or thickening of the artery walls, raising the risk of stroke, heart attack and heart disease.

    The study did not look at whether the heavy marijuana users actually had heart disease.

    The marijuana users in the study averaged smoking 78 to 350 marijuana cigarettes per week, based on self-reported drug history, the researchers said.

    The researchers said the active ingredient in marijuana, known as THC, seems to overstimulate marijuana receptors in the liver, leading to overproduction of the protein. [They] said higher levels of the protein in marijuana users could raise future risk for cardiac abnormalities, blood flow problems, heart attack and stroke.

    A U.S. group supporting legal sales and regulation of marijuana disputed the findings. Marijuana Policy Project spokesman Bruce Mirken said, for example, the study involved people who were extremely heavy users.

    “I think the low end was 78 joints a week. That’s 10 or 11 joints a day,” Mirken said in a telephone interview.

    “We’re talking about people who are stoned all the time. We’re talking about the marijuana equivalent of the guy in the alley clutching a bottle of cheap wine. If you do anything to that level of excess, it might well have some untoward effects, whether it’s marijuana or wine or broccoli,” Mirken added.

    “Even if you take this finding at face value, it’s not at all clear that it has any relevance to the real world because there is still no data showing higher rates of mortality among marijuana smokers. If this was a significant cause of cardiovascular disease, where are the bodies?”

    Mirken’s right. 78 to 350 joints a week? That’s 11 to 50 joints per day. Let’s see, the government-rolled joints weigh in at about ¾ gram each (you do know there are official US Federal Government joints, right?), but the folks I know roll them a bit bigger (even to the ridiculous cubit-sized 70-gram models). However, most researchers seem happy with the ¾ gram model, so let’s do the math:

    Low-end = 11 joints/day = 11 x 0.75g = 8.25g/day = about 2 ounces / week
    High-end = 50 joints/day = 50 x 0.75g = 37.5g/day = over 9 ounces / week

    So if you are consuming daily enough cannabis to equal about one-half to two-and-one-half pounds per month, then you might run an increased risk of stroke, heart attack, and heart disease. Personally, I’m thinking that at $300 per ounce, you’re more likely to run the risk of bankruptcy!

    Yet still, note that the study doesn’t check to see if the heavy marijuana users actually do have heart disease. The research done on the health effects of even heavy marijuana smokers show little if any difference between cannabis users and their non-using counterparts, and some studies even show a benefit from cannabis in treating hypertension.

    However, overeating, drinking alcohol, and smoking tobacco are proven to have deleterious effects on the heart and on health. I doubt we’re going to see any major effort to arrest the users of those substances, though.

    36 responses to “Marijuana may up heart attack, stroke risk-if you smoke 2-9 Oz. a week”

    1. […] post by Ron Fisher, NORML Outreach Coordinator delivered by Medtrials and […]

    2. […] Anthony Wilson wrote an interesting post today onHere’s a quick excerptSo if you are consuming daily enough cannabis to equal about one-half to two-and-one-half pounds per month, then you might run an increased risk of stroke, heart attack, and heart disease. Personally, I’m thinking that at $300 per ounce … […]

    3. Ganja Blue says:

      Yeah, that math didn’t add up for me either and I blogged about it here. The subjects self-reported their cannabis use and I’m thinking perhaps they were lying in order to get the study participant fee. I’ve known a lot of stoners, but none that smoked that much.

    4. Charles says:

      Yeah I Totally Agree With This!!! It Kinda Puts A Big Slap In The Face To Poeple Who Say Pot Can Kill You


    5. john r says:

      Well I must be a total anomaly . I consider ed my self a heavey user smoking up to ten joints a a day after halting my consumption of cannabis my colesterol rose to the 500 mark. I was placed on thr drug lipitor but after two years I ceased the use of Lipitor and began smoking once again this time at a rate of two to five joints a day. And for seven years my colestorol rates remained in the normal range. Last year I again ceased partaking of the herb. and In eight months my colesterol has once again been placed on Lipitor. So imho this is just another bunch of junk sience

    6. Marijke says:

      Hi, I’ve addressed the issue of medicinal marijuana on my pain blog and, as a nurse, I just can’t understand the whole issue of denying it to people who need it.

      This particular study you have here is a good example of how people are trying to prevent it from ever happening, too. Unfortunately, they seem to be winning.

    7. Queen Chiku says:


    8. Nina says:

      I’m only eating novadays without any heating and seems like if something like this could happen to have a cardiovascularic problems with a cannabis, it’s because of the smoke. Not because of the plant or these 70 pharmaceuticals with it. Tobacco cigarette seems to the the worse with all of these chemicals in it, when company increase something there.
      With joint, tar which comes after cordious, healthy oils are burning, is not in a same way healthy anymore. When cannabis is a syhtostat cancerkiller before, not after burning. Even cannabis specialists and older and wiser smokers are mostly denying this point, that’s why I’m feeling sad for. That’s also why these problems around the politics of cannabis using seems to keep going on when we are not creating this culture as more on a healthy standards.
      Eat, don’t smoke.

    9. […] average of 78 to 350 joints a week — 11 to 50 joints per day — which, according to the NORML blog, is equivalent to 2 to 9 ounces per week. The study did not research whether or not the subjects […]

    10. New Bankruptcy Laws In Idaho…

      I don’t mean to be too in your face, but I’m not sure I agree with this. Anyhow, thanks for sharing and I think I’ll come to this blog more often….