Marijuana use linked to heart problems
April 23rd, 2014
06:21 PM ET

Marijuana use linked to heart problems

Young people who use marijuana may be at risk for heart attacks and other serious cardiovascular problems, a new study suggests.

Researchers reviewed records from the French Addictovigilance Network, a national system of centers in France that gather information about drug abuse and dependence. From 2006 to 2010, they found 35 reports of patients who had experienced cardiovascular complications following cannabis use. The  study was published Tuesday in the Journal of the American Heart Association.

About 85% of the patients were men and their average age was 34. In nine cases the patient died.

While the study doesn't identify a particular level of risk of marijuana use, it does call for more research on the subject, and warns doctors that there seems to be at least some danger.

"Currently people think (cannabis is) harmless," says lead study author Emilie Jouanjus, at the Université Toulouse III – Paul Sabatier. "What I think is very important from my work is that we see cannabis use may lead to very serious complications on the cardiovascular system."

Jouanjus was surprised to find all but one of the patients with cardiovascular problems were under the age of 50. She believes this study shows only the tip of the iceberg, as people usually under-report their cannabis use.

"This study shows a some preliminary evidence of cardiovascular harm from marijuana but isn't conclusive,” Dr. Allen Taylor, chief of cardiology at Georgetown University School of Medicine, told CNN in an e-mail. “The study's limitations are important in that we can't know how high the risk is, just that there is a signal of risk between marijuana smoking and heart troubles.”

Taylor says it’s a shame that more isn't known about the potential harms of cannabis.

"It seems that public perception is ahead of the science," he says. "We should remain open to the scientific facts as they evolve."

Only 20% of patients in the study had a known history of heart disease or risk factors for heart disease. The other patients may have had unknown cardiovascular risk factors or a history that was not documented in the medical file.

“I'm not saying that any user of cannabis would suffer from any of these complications," Jouanjus says. But "we do not have enough information to say that cannabis use is safe."

Dr. Shereif Rezkalla. who wrote an editorial accompanying the study in JAHA, said doctors should be required to ask about marijuana use when they see a cardiac patient.

“The perception that marijuana is safe is deep-seated in the public and even amongst some health professionals,” says Rezkalla, a cardiologist at Marshfield Clinic in Marshfield, Wisconsin.

Taylor cautions that while this study doesn’t provide a final answer on the link between cannabis and serious heart problems, “it at least gives one pause to suggest to patients it may not be a heart-healthy habit."

Previous research has suggested marijuana use may double the risk of stroke in young adults.

soundoff (910 Responses)
  1. bytor

    this just in. breathing causes damage to the lungs due to expansion

    April 24, 2014 at 09:45 | Report abuse | Reply
    • snowman

      yeah and blinking causes blindness...lol

      April 24, 2014 at 10:00 | Report abuse |
    • kristine

      Are you a science DENIER, stoner?

      April 24, 2014 at 10:19 | Report abuse |
    • Mac

      Most people with cancer eat carrots. Therefore carrots cause cancer. It's called false causality.

      April 24, 2014 at 10:27 | Report abuse |
    • laeinstein

      That statement is totally wrong- where did you get your information from- breathing can only hurt your lungs if you are unfortunately in a room with a bunch of laughing lawyers

      April 24, 2014 at 11:08 | Report abuse |
  2. JJ

    NO WAY RAY!!
    This article upsets the whole movement forward....
    How dare you CNN print this and topple an agenda here.

    April 24, 2014 at 09:47 | Report abuse | Reply
    • Kerfluffle

      On the contrary, it fuels the movement, by highlighting the absurdity of the prohibitionists.

      April 24, 2014 at 11:13 | Report abuse |
  3. Madtown

    "Currently people think (cannabis is) harmless," says lead study author
    No, most people don't think that. They just think(correctly) that it's much LESS harmful than perfectly legal and highly marketed alcohol and tobacco.

    April 24, 2014 at 09:47 | Report abuse | Reply
    • Pamela Bright

      That is what some people want to believe. It is as bad as any other drug since marijuana now has a high THC concentration, yet people do not paid attention to that.

      April 24, 2014 at 10:17 | Report abuse |
    • Madtown

      It is as bad as any other drug
      This is simply false. How many MJ overdose deaths in the last year?

      April 24, 2014 at 10:36 | Report abuse |
    • ShawnM

      and Pamela, what does THC content have to do with your claims?

      April 24, 2014 at 10:36 | Report abuse |
    • DeathsChoice

      OMG... 9 people died over a 4 year span? Thats insane. That means 9 out of the estimated 10 million deaths (2.5m per year average) could have been caused by pot... well, okay technically by heart issues, which is after all the main cause of death (about 600k per year)... but you mean out of those 600k heart issue deaths 9 of them where from pot?! Why are we even discussing making this legal... wont someone think of the children!

      April 24, 2014 at 10:46 | Report abuse |
    • Fred Evil

      " since marijuana now has a high THC concentration"
      So what? Like saying drinking gin is vastly more dangerous than drinking beer. Not logical in the slightest.
      Though I agree smoking cannabis is NOT harmless, it is vastly less harmful than alcohol or tobacco.

      April 24, 2014 at 10:56 | Report abuse |
    • DilapidatedEmu

      According to the AMA, marijuana smoking produces 4 times as much cancer causing chemicals in it's tar than the equivalent smoked in cigarettes. Also, you logic is like saying assualting someone isn't bad because it isn't as bad as killing someone. I'd say try to use logic more, but... you know... can't expect much logic from potheads.

      April 24, 2014 at 11:00 | Report abuse |
    • TV2011

      Totally agree!

      April 24, 2014 at 11:00 | Report abuse |
    • Fred Evil

      DilapidatedEm, if you think that comparing assaulting someone vs. killing them is valid, I'd ask for your college tuition back,
      Stoner or not. Ridiculously poor analogy.

      April 24, 2014 at 11:18 | Report abuse |
    • jefnvk

      The majority of commenters I see on CNN definitely do think it is completely harmless, and will argue to the death over that.

      April 24, 2014 at 12:11 | Report abuse |
  4. Dan

    Headline: Marijuana use linked to heart problems
    End of article: "this study doesn’t provide a final answer on the link between cannabis and serious heart problems"


    April 24, 2014 at 09:49 | Report abuse | Reply
    • Fluffernutter

      Agree – what hype-building. And a just plain crappy all around assault on the legalization effort.

      April 24, 2014 at 10:09 | Report abuse |
    • Eeyore

      Do you have any evidence that it's simply an "assault" on legalization? Is any state citing this study and claiming that it's a reason to keep pot illegal?

      April 24, 2014 at 10:14 | Report abuse |
    • Ron

      "It seems that public perception is ahead of the science," he says. "We should remain open to the scientific facts as they evolve."
      Isn't it a joke that research on cannabis has been made impossible by the USA for seventy years and now all of sudden the media digs up stories like this one. Science and greed do not get along in the USA. Greed will win everytime.

      April 24, 2014 at 10:26 | Report abuse |
    • Logic

      They disclaim any "links" in their discussion. They admit there was no statistical basis nor enough toxicological evident to warrant definite linkage, yet the headline writers seemed to ignore that.

      April 24, 2014 at 10:45 | Report abuse |
  5. Farrok

    Marihuana is safer than table salt. Everyone is sick of this propaganda and lies.Where are the bodies? With the amount of Americans who smoke Pot the streets should be full of them?

    Alcohol is a product of filth, rot and putrefaction, Marijuana is a herb and a product of a garden. Stop lying about Marijuana. Marijuana is much safer than Alcohol and Tobacco. Government Lies!

    April 24, 2014 at 09:50 | Report abuse | Reply
    • NoNameRay

      Does anyone claim to use salt, tobacco or alcohol as medicine? Here lies the problem. The pot crowd are claiming MJ to be the miracle drug, so much so they'll probably be vaporizing it into babies humidifiers in hospitals. In 20 years we will all look back and see the truth that inhaling MJ smoke isn't good for you, just like tobacco smoke isn't good for you.

      April 24, 2014 at 10:06 | Report abuse |
    • Eeyore

      Alcohol is a product of "filth"? Hahahaha. What a boob.

      April 24, 2014 at 10:24 | Report abuse |
    • amy

      Cyanide comes from a plant. I wouldn't have it near me. You sound high or something. You are definitely in denial.

      April 24, 2014 at 10:35 | Report abuse |
    • Madtown

      Caffeine in high doses is more harmful than MJ.

      April 24, 2014 at 10:38 | Report abuse |
    • Oscar

      I remember doctors defending cigarettes in the 50's, what doesn't belong in your body, is harmful, your lungs are designed to process oxygen not smoke, but it's not until you're in your death bed that you realize, "well maybe they were right" lol

      April 24, 2014 at 11:10 | Report abuse |
    • DRG

      I agree that they aren't lying, but wake up NONAMERAY. There are many medicines allowed and legally provided by perscription and even over the counter that are bad for you. Ever hear of Tylenol, Prylosec, or all prescription pain killers,for instance? A doctor is supposed to work with patients and gauge what can help their sysmptoms and weigh the side effects. As for personal use, there are many harmful and legal things that poeple injest for fun or sustinance that are really much worse than anything that will ever be found in pot. Look at theh label of your food products...much of the unnatural ingredients are killing you or giving you diabetes. Alcohol and Tabacco are the worst for you...but the government doesn't over step their bounds by outlawing them.

      April 24, 2014 at 14:26 | Report abuse |
  6. Dawrin Finch

    Is this because couch potatoes don't exercise?

    April 24, 2014 at 09:51 | Report abuse | Reply
    • Jimbo

      I guess all those ultra marathon mountain bike races I've done make me a lazy pot head.

      April 24, 2014 at 10:11 | Report abuse |
    • luke

      I'm a healthy 43 yr old engineer who smokes regularly (evenings). I exercise regularly and am in amazing shape. My wife the Dr. also smokes regularly (evenings), and is 47 and in amazing shape. So we are both what you call "stoners" yet we are neither lazy, nor dumb, or fat and out of shape.

      April 24, 2014 at 12:46 | Report abuse |
  7. Jimbo

    There is some truth here ...

    I have smoked pot all my life. Years ago, the "best" weed you could get really wasn't that good by today's standards. And also back then concentrates such as hash oil and waxes were not available. So it was really hard to get a large dose of cannabis in your body. So it was, essentially, harmless.

    However today there are concentrates available that can make one hit of pot/oil up to 50 or 100 times more potent than one hit from yesterday's pot. I once made some brownies and put *a lot* of hash oil in it. I ate too much. My heart pounded for hours.

    I can see how this can happen today. It's the concentrates that you have to be careful with. Smoking pot is an easy way to temper your dosage. One hit? not enough. Two? Three? at some point you've had enough and you stop. But when you eat cannabis, there's no stopping after that third hit. By the time it hits you 30 minutes later you cannot un-eat what you ate.

    I agree that this article is slanted and has little scientific value but there is some truth here ...

    April 24, 2014 at 09:52 | Report abuse | Reply
    • doug

      I totally agree. I've been smoking pot for years, but the stuff that's out now, you have to be really careful. Especially with the concentrates have been known to cause a fast heart beat. Also, this study did not say whether they mixed cannabis with tobacco which is very popular in Europe, that could have added effects versus just smoking cannabis, maybe a study should be done comparing the two.

      April 24, 2014 at 10:13 | Report abuse |
    • Robin Glasco

      I agree with you on the edibles, can't undo em after you eat them. I never had heart problems but still won't eat my weed. What the article doesn't state, and none of the other people reporting on it have said is that the study was done in France and that 60% of the people studied also smoked tobacco. Wonder how they missed that little fact. I think it must not cost too much to buy negative advertising disguised as news.

      April 24, 2014 at 10:18 | Report abuse |
    • sa

      Well I'm sorry that you have been smoking crappy weed for all these years but what you say just isn't true. Those guys in NoCal have been growing quality stuff for decades. It's just that back then it was a bit harder to find than crappy Mexi brick weed. And things like hash oil and hash with up to 50% thc (same as today) have always been around, at least in the coastal metro areas. In fact, it was much easier to get imported hash back in the 80's than it is today. And don't even get me started on things like Thai stick or Buddha stick that just isn't around any more. If you think weed is better today it's just because the higher quality stuff is more widely available today but it has always been around. Sure, most people will disagree with me but that's because good weed is new to them. And the FBI's tracking of thc levels over the years doesn't mean anything because that's just the average from busts which were mainly imported from Mexico, not domestically grown. Now there's a higher percentage of domestically grown which is why the thc levels are going up.

      April 24, 2014 at 10:28 | Report abuse |
    • luke

      Agreed. I am a regular user, but have to admit the edibles with no label on dosage or concentration of marijuana are dangerous. I've seen what 3 cookies do when you told them to only eat a half. The edible market really needs better regulation I think or we will have more people taking far to much.

      April 24, 2014 at 12:49 | Report abuse |
  8. thecryptowizard

    "the study doesn't identify a particular level of risk of marijuana use"
    Enough said.

    April 24, 2014 at 09:55 | Report abuse | Reply
    • amy

      The article says there IS a level of risk. If you want to take that risk, have at it. Why would anyone do something and risk the problems so many studies are now showing about MJ? I guess because people are addicted and can't quit.

      April 24, 2014 at 10:39 | Report abuse |
    • Fred Evil

      " Why would anyone do something and risk the problems so many studies are now showing about MJ? "
      Considering ALL of those studies still conclude it is VASTLY safer than alcohol, tobacco or ASPIRIN, your point is ignorant.
      Alcohol, tobacco and aspirin can KILL users, not so cannabis.

      April 24, 2014 at 11:00 | Report abuse |
  9. Michael Chapel Hill

    Oh...I thought the news is a mistake. So the govt will be ready with handouts to all marijuan addicts. Who is going to sue the states promoting marijuana?

    April 24, 2014 at 09:56 | Report abuse | Reply
  10. Dave

    So in four years they found 35 people who had heart attacks after smoking pot...and while it doesn't prove anything, more study is needed. Do I have that right?

    Pot has been associated with more human health problems than you can shake a stick at. In my day, it's been a cause of birth defects, breasts on males, cancer, bronchitis and COPD, schizophrenia and violence.... except that "further study" never leads anywhere.

    So now here's another story on the evils of pot...and you "researchers" wonder why folks don't take you seriously on other subjects. Once it's clear that researchers will lie and cheat to accommodate government propaganda... Well, then that's what folks expect.

    There shall be more of these "maybe pot causes" stories...and there shall be no follow up, and no science accomplished. It's propaganda.

    April 24, 2014 at 09:57 | Report abuse | Reply
  11. sjwhyter

    Report shows eating Big Macs can cause heart attacks,
    Report shows drinking alcohol can cause heart attacks,
    Report shows sex can cause heart attacks,
    Report shows sleep can cause heart attacks,
    Report shows walking can cause heart attacks,
    Report shows running can cause heart attacks,

    Where do these idiots get off publishing crap like this. I am not an advocate of pot use, but this crap is just ridiculous.Any study can have the outcome the researchers want, if it is believed at the start of a study. These people are not scientist, they are journalistic equivalent of a blogger.

    April 24, 2014 at 10:01 | Report abuse | Reply
    • jasonforges

      Actually marijuana is worse than everything you stated that it why it is labeled a "drug" and if you don't know where this journalist got this information why call him a blogger it is obvious he or she have a very good source

      April 24, 2014 at 10:27 | Report abuse |
    • Cynic

      jasonforges, if you'd objectively look at the history of cannabis and the history of its legality/illegality in the United States, you'd understand why people are skeptical. Powerful people with less than altruistic motives have pushed the propaganda since the 1930s. It was legal before 1937.

      April 24, 2014 at 10:53 | Report abuse |
    • Cynic

      Yes, I get rather sick of the "health scare of the week" mentality of the media.

      April 24, 2014 at 11:02 | Report abuse |
    • sjwhyter

      jasonForges, you miss the point, there are many things that can cause heart attack, some more that others. I have worked in the clinical studies area for years and have seen researcher do some pretty bad things to either push their agenda, or to get press. The part of this article that I though screamed red flag was the sampling 35 out of 1979 people, not really a high number, and if they were only studying cannabis use, what about all of the other factors of heart disease? I have seen clinical study fail because a patient dies while on the study, and it was not even related to the study, and have seen the opposite. Again the point is many things can cause heart attacks, and if you don't want to have one, stop doing everything bad, and at that point might as well kill yourself!

      April 24, 2014 at 11:22 | Report abuse |
  12. DinkyPink

    bet it doesn't cause anal leakage, and the million other side affects that take 5 minutes to rattle off during all prescription drug commercials.

    April 24, 2014 at 10:02 | Report abuse | Reply
    • Eeyore

      What part of risk vs. benefit do you fail to grasp? Is marijuana being subjected to the same kind of testing as pharmaceuticals?

      It's hilarious to see the outrage among posters here every time a study of any kind is reported, but this one has generated an especially amusing array of comments. It's pretty clear that for some of you, ANY study that shows that marijuana may be detrimental to one's health in any way is practically a criminal act! This study may or may not be able to definitively show a link between pot smoking and heart disease, but that doesn't mean marijuana is harmless and that no further studies are needed.

      The same doofuses who claim that "Big Pharma" is the devil and that all legal pharmaceuticals, despite years of testing and FDA oversight, are "poison" are perfectly happy to toke something that hasn't been thoroughly tested at all and claim it's completely safe.


      April 24, 2014 at 10:11 | Report abuse |
    • sa

      The argument is not that cannabis is safe, it's that it is safer than substances that are legal so why is it illegal?

      You talk about subjecting cannabis to FDA tests but that's part of the problem, it can't be because it is labeled as a schedule 1 drug. Even the AMA says it has potential medical benefits so why is it still schedule 1? And cannabis has been tested over thousands of years. It's not the menace that the government claims it is.

      April 24, 2014 at 10:37 | Report abuse |
    • Eeyore

      How do you know it's "safer"? You claim it's been "tested over thousands of years." It has not been tested as have the pharmaceutical drugs that are approved for use in the US. And part of the problem is that because it has been illegal, it is difficult to do such research. That doesn't mean that cannabis smoking is "safer" than legal drugs. It simply doesn't.

      April 24, 2014 at 13:01 | Report abuse |
    • sa

      Compare mortality rates for tobacco and alcohol users vs. cannabis users. That's how I know it's safer. There are plenty of reports out there if you want to take a look. And I'm not saying cannabis use is 'safe', whatever that is. All I'm saying is that it's pretty obvious that if other substances that harm people are legal then substances that have lower toxicology, addiction rates and mortality rates should also be legal. In other words, illegality should be determined by science not politics.

      April 24, 2014 at 13:15 | Report abuse |
    • Eeyore

      "There are plenty of reports out there." Then cite them. Are they studies in which the users were self-reporting? If that's the case, and it probably is, then how good is the study?

      Again, you make claims just as a bunch of others do, but you can't back them up.

      April 24, 2014 at 13:18 | Report abuse |
    • sa

      Sorry Eeyore, I'm not going to cite them. You know as well as I do that there is plenty of information available about toxicology, addiction rates and mortality rates for various legal vs. illegal substances. If I cited studies, what would that do? You would find something else to nit pick about so I'm not going to play your silly game. It's obvious to anyone familiar with the subject that cannabis is less dangerous than many legal substances. And my main point again is that illegality should be determined by science, not politics. And I don't need to cite any studies to support that opinion. One that many people (probably including yourself) would agree with.

      April 24, 2014 at 15:09 | Report abuse |
  13. Dave

    How does that compare to the heart problems caused by caffeine?

    April 24, 2014 at 10:04 | Report abuse | Reply
    • Eeyore

      Why don't you look up the studies and find out?

      April 24, 2014 at 10:11 | Report abuse |
  14. Kalo

    35 people over years is a horrid sample size and irresponsible to say correlation. She should be ashamed as a scientist to infer anything from this study.

    April 24, 2014 at 10:06 | Report abuse | Reply
    • keith

      i like how you think

      April 24, 2014 at 10:07 | Report abuse |
  15. keith

    too much of anything is bad this is not news but good job trying

    April 24, 2014 at 10:06 | Report abuse | Reply
  16. Farrok

    In America we are walking around knee deep in garbage, no work, high unemployment, high underemployment and the System is worried about Marijuana? 25% of the Children in the State where I like are in Poverty! Now going hungry, missing meals and not having any health care must be hard on a person's health.

    American Government would much rather have you starve to death than smoke a joint - "it's safer"......

    April 24, 2014 at 10:06 | Report abuse | Reply
    • sa

      Maybe you should move to Colorado where pot is legal.
      unemployment: 6.2%
      Bachelor’s degree or higher: 36.7%
      advanced degrees 13.4%
      Median household income: $55,387 (15th highest)
      Pct. below poverty level: 13.5% (18th lowest)

      April 24, 2014 at 13:36 | Report abuse |
  17. Artist51

    I could have told you this. You don't have to have a medical degree to see that marijuana is poison.

    April 24, 2014 at 10:07 | Report abuse | Reply
    • Fred Evil

      it's clinically safer than aspirin, genius.

      April 24, 2014 at 11:03 | Report abuse |
  18. compositor13@aol.com

    More ignorance and fear mongering about pot in the guise of science. Nothing new here. Same old lies, same old studies that go nowhere and the same old pandering of booze and prescription drugs. CNN needs to fill their "pages" and seems not to care what they put up for us to read.
    Under further study is whether there is actually any news here. Results = NO. Just BS at it's best.

    April 24, 2014 at 10:11 | Report abuse | Reply
  19. Victor

    "From 2006 to 2010, they found 35 reports of patients who had experienced cardiovascular complications following cannabis use."

    Really CNN?? A whole 35??

    Notice the article makes no mention of their family history or current physical condition, only that they smoked cannabis. This is a fraud of an article.

    Secondly, I have personally smoke cannabis for 15 years and I recently had an EKG and Stress Test done on my heart: Healthy as a horse.

    Yellow Journalism at its finest here folks.

    April 24, 2014 at 10:11 | Report abuse | Reply
    • Eeyore

      Uh huh. My grandfather ate bacon and smoked a pack a day and lived to be 99.

      Anecdotes prove nothing.

      April 24, 2014 at 10:16 | Report abuse |
    • Victor


      Uh huh. My grandfather ate bacon and smoked a pack a day and lived to be 99.

      Anecdotes prove nothing."

      And a sample size of 35 people over a 4-5 year period does? Sure...

      April 24, 2014 at 10:17 | Report abuse |
    • Eeyore

      No, honey. YOUR anecdote proves nothing. The study at least shows that there may be reason to perform more extensive research on the issue. It doesn't CLAIM to prove anything, only that there were some interesting results.

      April 24, 2014 at 10:21 | Report abuse |
    • Victor

      "No, honey. YOUR anecdote proves nothing. The study at least shows that there may be reason to perform more extensive research on the issue. It doesn't CLAIM to prove anything, only that there were some interesting results."

      My claim is about as valid as that "study" you are toting. That was the point you windbag.

      April 24, 2014 at 10:36 | Report abuse |
    • Eeyore

      No, it is not as valid. You are a sample of ONE. Your experience is not as valid as a study. This study isn't proving that cannabis is harmful. And you're not proving that it isn't. Get it?

      Now, why don't you look up "yellow journalism" and find out what it really is, dear?

      April 24, 2014 at 13:03 | Report abuse |
  20. Eeyore

    If you're all so upset at the fact that CNN is reporting on this issue, then why do you read and post here for free? Go somewhere else.

    April 24, 2014 at 10:13 | Report abuse | Reply
    • Victor

      Sorry if there are those of us who do not think highly of the Yellow Journalism that is displayed by our major media outlets in this country. Perhaps you think it is ok, and would like to keep things as they are, but many of us don't like being manipulated and lied to.

      Also, this is a free country (at least it used to be) and we can read and post on whatever article we please.

      April 24, 2014 at 10:15 | Report abuse |
    • Eeyore

      Sure you can, dear. I'm certain your primary reason is because you don't have to pay for a subscription and you get to see your name in print. You don't seem to get it. If you don't like what a restaurant is serving, then you don't have to go there to eat. This isn't "yellow journalism". I doubt you even know what the term means. CNN is simply reporting on a study. It's not "propaganda" or anything of the sort. You simply don't like what the study found and you think it shouldn't be reported because of your preferences. Tough toenails, dude. You don't have to read it. Others might feel differently, and CNN has every right to report it as news.

      April 24, 2014 at 10:19 | Report abuse |
    • Victor

      The fact you refer to it as a "study" shows you are full of it. It was 35 people over a 4-5 year period. It is absolutely propaganda and straight out Yellow Journalism.

      They are trying to play it off as some kind of comprehensive scientific study, when fact is, it is not even close to being scientifically valid.

      April 24, 2014 at 10:21 | Report abuse |
    • Eeyore

      Nope. You have a lot of trouble with reading comprehension, don't you?

      April 24, 2014 at 10:23 | Report abuse |
  21. jasonforges

    Its true all you idiots on here think it is safe to smoke weed well in the long run you will see for your selfs!!

    April 24, 2014 at 10:17 | Report abuse | Reply
    • Victor

      Safe? No. Less harmful than other things that are currently legal? Yes.

      April 24, 2014 at 10:18 | Report abuse |
    • Victor

      There is also no legitimate argument of why industrial hemp is illegal as well.

      April 24, 2014 at 10:19 | Report abuse |
    • Eeyore

      "Less harmful"? How do you come to that conclusion? There haven't been enough studies done to show that it's "less harmful" and it certainly hasn't been regulated or tested as pharmaceuticals are.

      April 24, 2014 at 10:22 | Report abuse |
    • Victor

      ""Less harmful"? How do you come to that conclusion? There haven't been enough studies done to show that it's "less harmful" and it certainly hasn't been regulated or tested as pharmaceuticals are"


      "Alcohol ranks "most harmful" among a list of 20 drugs, beating out crack and heroin when assessed for its potential harm to the individual imbibing and harm to others, according to study results released by a British medical journal." .... The study was funded by the London-based Centre for Crime and Justice studies.

      "Heroin, crack cocaine and methamphetamine were the most harmful drugs to individuals, the study says, while alcohol, heroin and crack cocaine were the most harmful to others."

      "For overall harm, the other drugs examined ranked as follows: crystal meth (33), cocaine (27), tobacco (26), amphetamine/speed (23), cannabis (20), GHB (18), benzodiazepines (15), ketamine (15), methadone (13), butane (10), qat (9), ecstasy (9), anabolic steroids (9), LSD (7), buprenorphine (6) and magic mushrooms (5)."

      Last I checked, tobacco and alcohol are both legal and more harmful than Cannabis according to a "real study."

      April 24, 2014 at 10:26 | Report abuse |
    • Victor

      And I can't believe you had the nerve to mention the "testing of pharmaceuticals." Are you insane? Do you even see the side affects listed with some of these "FDA approved" drugs?

      You can't be serious.

      April 24, 2014 at 10:30 | Report abuse |
    • Cynic

      "...in the long run you will see for your selfs."

      I've been waiting for decades.

      April 24, 2014 at 11:04 | Report abuse |
    • Eeyore

      Those aren't peer-reviewed studies, Vicky. And you're comparing legal substances that are regulated to something that is not. Not the same thing. Apples and oranges.

      April 24, 2014 at 13:04 | Report abuse |
  22. Demonicego

    Boy, they sure are trying hard to find any reason to demonize weed. I've been smoking for over 30 years. My heart is more than strong enough to take an accidental quick shot of Morphine from a new nurse that the doctor said would have killed me if I had a weak heart. Imagine where we would be if the Alcohol industry was demonized as badly for the "proven" damage created by drinking.

    April 24, 2014 at 10:19 | Report abuse | Reply
  23. qckslvr

    This doctor,Allen Taylor,should be embarrassed his name is associated with this so-called study.We don't need no stinkin scientific methods.He's a doctor,really?

    April 24, 2014 at 10:19 | Report abuse | Reply
  24. humanproblem

    i've never heard of anyone saying it's "harmless"
    ...driving isn't harmless
    ...running isn't harmless

    and i've known of people who have blood pressure issues having complications due to marijuana. but that doesn't mean you criminalize it

    April 24, 2014 at 10:20 | Report abuse | Reply
    • qckslvr

      Don't forget,aspirin isn't harmless and you can actually drown by drinking too much water.

      April 24, 2014 at 10:52 | Report abuse |
  25. humanproblem

    someone should tell these people, these "scientists," what a straw man argument is

    April 24, 2014 at 10:20 | Report abuse | Reply
  26. LI_Bri

    I call BS.

    April 24, 2014 at 10:24 | Report abuse | Reply
  27. Matt

    Wah wah wah is all I read. Oh no marijuana COULD be bad for your heart and or health?! YOU DONT SAY?! Just like caffeine, alcohol, cigarettes, red meat and a crappy diet, not stretching enough, not drinking enough water, sitting for 8 horus a day, the list goes on. There are a million things that are "bad" for you and until more science comes out to prove how bad it actually is I am going to put marijuana towards the bottom of that list.

    April 24, 2014 at 10:24 | Report abuse | Reply
  28. Backseat Love

    Sounds like the stoners need a new drug.

    April 24, 2014 at 10:25 | Report abuse | Reply
  29. Kenny Dwit

    Oh dear God!!! Will the bs ever end. Thousands of years of vetting this stuff and no bodies. NO BODIES ANYWHERE. LOL.

    April 24, 2014 at 10:27 | Report abuse | Reply
  30. Eevee

    Where did they find a study group where "20% of patients in the study had a known history of heart disease or risk factors for heart disease" and the rest weren't asked? Then they tell us 35 patients had cardiovascular events without telling us how large the study group – so we can't judge if the 35 were higher or lower than 20% of the total. We're not told how many of these events were minor tachychardia which is a known reaction to some strains and not dangerous. Scientific results can be misrepresented easily when you only give part of the story, and this one is a thinly veiled 'marijuana might kill you' slant. Give me the total size of the study, which they could have done in one short clause, and let us judge if there's an increased risk for the overall size of the study group.

    April 24, 2014 at 10:29 | Report abuse | Reply
    • Kerfluffle

      Funny that you called someone else a 'windbag'.

      April 24, 2014 at 11:51 | Report abuse |
  31. ItSoNlYmE

    The key phrase in this entire article is in the first sentence: "a new study". When there are 25, or 50, or 100 new studies that corroborate this single study, then we might have something to talk about. Meantime this is *a* study and it's essentially meaningless.

    April 24, 2014 at 10:31 | Report abuse | Reply
    • Natrldiver

      Not necessarily meaningless. It just give it a point for further studies. Would you prefer that people just ignored the issue as a whole and see that down the road we could be worse off or actually do some thorough research and see what the genuine effects of prolonged use can do ones health?

      Turning a blind eye to initial information is just ignorance in itself.

      April 24, 2014 at 10:43 | Report abuse |
    • Logic

      It is not a "study". Someone went through a bunch of reports that are mandated by the government of FRANCE, and found some cannabis users among them. All this "report" does is confirm is there are cannabis users among people who reported heart problems. Not that surprising.

      April 24, 2014 at 13:47 | Report abuse |
    • Eeyore

      If it's "essentially meaningless," then why are so many people on here raving hysterically about it?

      April 24, 2014 at 13:56 | Report abuse |
  32. Scrape

    We all know weed is not 100% safe, nothing is really.

    April 24, 2014 at 10:32 | Report abuse | Reply
    • tjp44

      with that said....let's go burn one!

      April 24, 2014 at 11:06 | Report abuse |
  33. noone

    So, four years and out of 1979 "cannabis related events" 35 people have cardiovascular events and this is somehow "proof" that cannabis caused the problems? This is asinine. This "study" suffers from the same problems almost all other "cannabis is bad" studies. Small sample size, self reporting, conflicts of interest (The French Association of the Regional Abuse and Dependence Monitoring Centres (CEIP‐A) Working Group on Cannabis Complications) and no actual science is done (no double blind experiments). Complete...total...BS!

    April 24, 2014 at 10:34 | Report abuse | Reply
  34. jerjitsu

    I used to be a stoner for many years. I lived in Humboldt County. I must say, there were a few times when it felt like I was going to have a stroke. My left arm went numb and my heart was beating weird. This happened again shortly after I had my first son and I never smoked weed again. That was 5 years ago. I don't miss it.

    April 24, 2014 at 10:36 | Report abuse | Reply
    • Kerfluffle


      April 24, 2014 at 11:22 | Report abuse |
    • luke

      People often confuse anxiety with a cardiac issue.

      April 24, 2014 at 12:55 | Report abuse |
  35. diluded000

    If it wasn't classified as a schedule I narcotic, it would be lots easier for private medical researchers could look into these things. As it is now, survey data isn't reliable because accurate reporting requires people to admit to a crime.

    April 24, 2014 at 10:40 | Report abuse | Reply
  36. Logic

    I just read a study where 100% of people who have heart problems, also have hearts.

    April 24, 2014 at 10:41 | Report abuse | Reply
    • noone

      We need to ban hearts now! Think of the children!

      April 24, 2014 at 10:45 | Report abuse |
  37. TrueEpi

    This sample size is laughable, this fear of causality is supremely premature, and the timing is impeccable. Lets Page Dr. Gupta!

    April 24, 2014 at 10:42 | Report abuse | Reply
  38. Jodo

    A "study" which had a cohort size of 35 people and was not a random double blind is not worthy of the term study. And to concluded that the "study" "SUGGESTS" is ludicrous. There is no mention of the phenotypes or other foods / drugs that may have been ingested at the same time.

    Tylenol causes death, but cannabis is illegal. Go figure.

    April 24, 2014 at 10:45 | Report abuse | Reply
  39. Kevin Hunt

    Research Suggests Caffeine Increases Heart Attack Risk

    Even more troubling, the researchers concluded that the equivalent of four cups of coffee raises blood pressure for many hours. Although the increases appear modest, they are large enough to affect heart attack and stroke risk, says lead author James D. Lane, PhD. The findings were reported in the July/August issue of the journal Psychosomatic Medicine.

    Source: Web MD

    April 24, 2014 at 10:49 | Report abuse | Reply
  40. jeff

    I'm sure the Aspartame and splenda and GMOs that we consume are JUST FINE for us, right?

    April 24, 2014 at 10:51 | Report abuse | Reply
  41. Edward

    Smoking MJ regularly for the past thirty years, I have ended up two times in the ER due to irregular heartbeat/palpitations.
    Having this issue just after smoking, I thought, at the time, that like the article reads: MJ creates heart issues.
    Then I started thinking and analyzing: why was this stash creating me heart problems and another stash would not? After spending sometime thinking about the problem, I found it. What creates heart palpitation when smoking sometimes is not the herb, but the MOLD of the herb. Some MJ travels long distances in compressed black plastic bag while the MJ is still a bit humid, and this is the perfect environment for creating mold (which is a type of fungus). You normally can see it (white fuzzy 'snow' on the buds) or better, smell it.
    The solution? I found out that putting your grass in the microwave would kill the mold but not the THC level. You can then smoke this stash in peace, knowing that it will not have adverse effects such as giving you palpitations.
    So researchers, concentrate on the mold, whereby there lies the problem...

    April 24, 2014 at 10:53 | Report abuse | Reply
  42. NateEngle

    I don't doubt that some of the millions of men who smoke pot have died of heart attacks. There are probably also some with hemorrhoids and male pattern baldness, but I'm not sure this really allows us to say anything meaningful about national drug policy.

    April 24, 2014 at 10:53 | Report abuse | Reply
  43. Mark

    Poorly done CNN. This is a very disappointing article coming from your organization and only perpetuates the common thought that media is missing the mark across the board these day. Very sad

    April 24, 2014 at 10:55 | Report abuse | Reply
  44. KJustThinking

    There are so many issues with this study. The top two issues that undermine their conclusion are:

    Only 35 out of 1979 people over the course of 5 years reported cardiac events–that's only 1.8%. That's not really statistically significant enough to cry connection.

    This wasn't a controlled study–it was based on collecting reported third-party data from the French Addictovigilant Network. As such, there is no way to know for sure if cannabis was the only drug used by the people who suffered cardiac events, rendering even the 1.8% claim dubious.

    Furthermore, even the study itself, in it's conclusion, admits that their study shows could just as likely be interpreted to show that there is little to no impact on the cardiovascular system via cannabis use as otherwise. So, while there should be continued investigation into any substance use/abuse by folks, this study does nothing to bolster the claims of the so-called harmful effects of cannabis. It has still been proven to be much, much safer than legal recreational substances such as cigarettes and alcohol, as well as incredibly safer than legal medicinal substances such as opiate-based medicines. In that light, there really is no logical or scientific argument that supports maintaining the illegal status of cannabis.

    April 24, 2014 at 10:56 | Report abuse | Reply
  45. Andy

    Even if it gives me a cancer, I am ready to die with happy smile on my face!!
    Thanks to MJ.

    April 24, 2014 at 10:57 | Report abuse | Reply
  46. tjp44

    amazing how this was never mentioned before by the govenment or in any of their scare tacic videos.....good try but everyone's still sparking them up and it CANNOT BE STOPPED!!

    April 24, 2014 at 11:02 | Report abuse | Reply
  47. tjp44

    funny how CNN has gon elib and PC with everything else???????? not blocking me anymore either wow!

    April 24, 2014 at 11:04 | Report abuse | Reply
  48. Steve

    Sure, now that it's becoming legal and the Feds. see a lot of money to make here, all of a sudden it doesn't harm you. Five years ago it was one of the worst things you could put in your system. Last week an article about pot and violence, now, pot and health problems. Tomorrow, pot and addiction. But, other states will make it legal so they too can join the money train. They can use that money to build more prisons, hospitals and cemeteries.

    April 24, 2014 at 11:05 | Report abuse | Reply
  49. Bob

    Junk science with an agenda. The article contradicts it's own claims.

    April 24, 2014 at 11:06 | Report abuse | Reply
  50. timedonkey

    This is not research. These is zero clinical data. this is looking at incomplete past medical records and asking heart problem folks if they have ever smoked marijuana, if they said yes, then they count that as evidence that marijuana could be linked to heart problems. It is like asking heart problem folks if they have ever eaten chocolate and linking chocolate to heart disease.

    April 24, 2014 at 11:07 | Report abuse | Reply
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Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.