this should be funny
im glad i actually read what u copied an pasted.
http://news.harvard.edu/gazette/2000/03.02/marijuana.html
Mittleman noted that, as an immediate trigger for heart attack, pot smoking is nearly twice as dangerous as sex for a sedentary person, exercise for a fit male or female, a tantrum of rage, or a bout of anxiety. But it’s less risky than a spurt of exercise for a couch potato or a snort of cocaine.
Despite the high percentage of people younger than 50 years old who report they use the drug – 12.5 percent – Mittleman doesn’t foresee an epidemic of pot-triggered heart attacks
. For a 50-year-old baby boomer without other risk factors, like high blood pressure or high cholesterol, the absolute risk of having a heart attack in the crucial first hour after smoking marijuana is one in 100,000, he says.
http://www.cannabis-med.org/english/faq/07-heart-attack.htm
The overall effect of cannabis use on the frequency of heart attacks is unknown. This can only be ascertained in longitidudinal epidemiological studies. There are some studies and case reports that support the assumption that cannabis use may be harmful in people with coronary disease and may trigger a heart attack. However, this seems to be a very rare event.
Cannabis will not cause a heart attack in a healthy person.
There are some pharmacological effects of cannabis that may act preventive and some that may be damaging.
Factors that may be damaging:
- The decrease of oxygen delivery to the heart (only if cannabis is smoked), due to the production of carbon monoxide.
- The increase of heart rate of about 45% on average in the first hour after smoking. Thus a normal heart rate of 70 may increase to about 100. This increases labour and thus oxygen demand (or oxygen need) of the heart muscle.
- Changes of blood pressure. Cannabis may cause the blood pressure to increase when the person is lying down, and to decrease when the person stands up.
Factors that might be preventive:
- If the angina is based on a spastic contraction of the coronary arteries, cannabis may relax the spasm.
- Cannabinoids reduce platelet aggregation, thus they may reduce the tendency of the blood to form clots.
- Cannabinoids act anti-inflammatory. Inflammation measured as the level of CRP is associated with a higher risk of heart attack.
In coronary disease the heart attack risk of cannabis use may be as high as going for a walk or having sex. So if you feel chest pain while walking or if you know that you have a severe coronary disease you should better not take cannabis or only in low doses that do not significantly increase heart rate. These low doses are often high enough for the therapeutic effectiveness of cannabis. You can measure your heart rate yourself and find out how it changes in reaction to cannabis. In case of an accidential overdose you can prevent the increase of heart rate by taking a beta-blocker.
http://www.erowid.org/plants/cannabis/cannabis_myth4.shtml
Frequent marijuana smokers experience adverse respiratory symptoms from smoking, including chronic cough, chronic phlegm, and wheezing.
However, the only prospective clinical study shows no increased risk of crippling pulmonary disease (chronic bronchitis and emphysema).
Since 1982, UCLA researchers have evaluated pulmonary function and bronchial cell characteristics in marijuana-only smokers, tobacco-only smokers, smokers of both, and non-smokers. Although they have found changes in marijuana-only smokers, the changes are much less pronounced than those found in tobacco smokers.
The nature of the marijuana-induced changes were also different, occurring primarily in the lung`s large airways - not the small peripheral airways affected by tobacco smoke. Since it is small-airway inflammation that causes chronic bronchitis and emphysema, marijuana smokers may not develop these diseases
http://www.parl.gc.ca/Content/SEN/Committee/371/ille/library/Wheelock-e.pdf
John P. Morgan and Lynn Zimmer state that current research indicates that moderate smoking of cannabis appears to pose minimal danger to the lungs. Like tobacco smoke, cannabis smoke contains a number of irritants and carcinogens. Because cannabis users typically smoke much less often than tobacco smokers and, over time, inhale much less smoke, the risk of serious lung damage should be lower in cannabis smokers
The authors note there have been no reports of lung cancer related solely to cannabis.
your opinion is definitely not bs and is vauled. however just your comment was incomplete information. you stated that 420 smoke has more cancer causing agents than tobacco smoke yet here have been no reports of lung cancer related solely to cannabis. your post implied that cigarettes are less dangerous than 420 and IMO thats irresponsible to say that.