First of all, i don't even consider cannabis as being a drug, really, from all the health benefits you can get out of the plant, to making clothes with it, as a plant, it is no more harmful to you then a cow, but is a hell of a lot better for you.
Hemp oil for example, it's 3:1 ratio of omega-6 to omega-3 fatty acids, it's made up of about 80% of essential fatty acids (linoleic acid, alpha-linoleic acid, gamma-linoleic acid, omega-6, omega-3 and stearidonic(moronic) acid), and 20% protein, of which 6.6% is edestin, and the rest are albumins, it is much lower in saturated fatty acids then any other culinary oil... (Reference 2)
Now as a so-called "illegal drug" cannabis is actually better for you then tobacco. Here's another way to look at it:
Scenario 1: say you choose to smoke either substance
Tobacco, contains nicotine, that leads to chemical addiction, you get a mild high off of it, but your body quickly becomes adapted to this higher level of nicotine that quickly makes the whole point of smoking mute. You start smoking more and more, progressively increasing from maybe a few cigarettes to a pack, to 2 packs, etc, etc. What you get out of it is, ofcourse the satisfaction of not getting the cramps, and lots and lots of soot in your lungs.
Cannabis, contains no chemicals that lead to physical addiction, gets you reasonably high for longer periods of time, continues to get you reasonably high, even as your mind adopts to the level of highness. You smoke much, much more rarely then a cigarette, and quitting is as simple as not buying the "drug" anymore.
Scenario 2: vaporising
Tobacco, with the oils, you still get nicotine in your body, which still makes you dependent on it, while no soot will accumulate in your lungs, you will still continue to seek more and more nicotine to beat the urges
Cannabis, once again, it contains THC, but its not physically addictive. Vaporising gets you a clean high, and the much better extraction of only the oils that contain THC makes you use even less plant then you would before, essentially making it much more harmless then Tobacco.
But wait, what are the effects?
Well, lets compare Cannabis to another legal substance, alcohol.
Alcohol, well rather ethanol, C2H5OH, is passed through the stomach to the small intestant, where it is rapidly absorbed into the blood stream, which makes it quickly effect all body's functions. It acts as a depressant on the central nervous system. "In low concentrations, alcohol reduces inhibitions. As blood alcohol concentration increases, a person's response to stimuli decreases markedly, speech becomes slurred, and he or she becomes unsteady and has trouble walking" (see reference 1)
As we go through the different stages of intoxication (Euphoria, excitement, confusion, stupor, coma), at even the most beginning stages of intoxication (0.03 BAC (g/100ml blood)), we can see diminishing of attention, judgement, control, impared motory reflex, which means that even low levels of alcohol in the blood impare driving abilities of a person, when we get to confusion state (0.18 BAC) all of this is extremely excentuated, person looses the sense of ballance, we see imparement of judgement on a grandiose scale, leading to apathy, this also puts you in an exaggerated emotional state, that ofcourse with violent tempers lead to some violent and explosive people, the sensory perception starts blurring vision, decreasing color and dimensions perception, increasing pain threshold, etc. Also i should note that there are numerous death every hear from overdose on alcohol.
THC, C21H30O2, the effects of the drug are achieved by this chemical bonding to cannabioid receptors (C1 and C2, central nervous and immune systems), "the lack of receptors in the medulla significantly reduces the possibility of accidental, or even deliberate, death from THC, and the lack of receptors in the mesocorticolimbic pathway significantly reduces the risks of addiction and serious physical dependence."(2) Here's what erowid (reference 3) says about negative effects: "
* nausea, especially in combination with alcohol, some pharmaceuticals, or other psychoactives
* coughing, asthma, upper respiratory problems
* difficulty with short term memory during effects and during periods of frequent use (Ranganathan M, D'Souza DC, Psychopharmacology, 2006)
* racing heart, agitation, feeling tense
* mild to severe anxiety
* panic attacks in sensitive users or with very high doses (oral use increases risk of getting too much)
* headaches
* dizziness, confusion
* lightheadedness or fainting (in cases of lowered blood pressure)
* paranoid & anxious thoughts more frequent
* possible psychological dependence on cannabis
* clumsiness, loss of coordination at high doses
* can precipitate or exacerbate latent or existing mental disorders
"
All in all, not extremely unlike alcohol, but not extreme like alcohol.
There has never been a documented death from ODing on Cannabis, this is likely also due to the fact that the ratio of effective to lethal dose of THC is around 1:1000, other examples are alcohol 1:10, cocaine 1:15, and heroin 1:6. Lethal dose seems to differ from animal to animan, and from the way of intake, in rats lowest value is by inhalation and is around 42mg of THC per kg of body weight. If it effects humans the same way, this would amount to a massive 8.6 grams of THC for an average 175lb person. Slightly extrapolating here based on some data from Erowid, average weight of high potency dried bud that is required is around 1/30g to get lightly high, 2/30g to get average high, and 1/10g to get a strong high, that ofcourse is nowhere near 100% thc. So to approximate the THC content, medical dosage is 5mg 3 times daily, which in size terms is around 1 cigarette a day weighing less the 1g, so extrapolating, 1 gram of weed yeilds around 15mg of THC, thus to get 8575mg of THC one would need to smoke 571.6g of high potency weed in about 15 minutes of time (also considering that 1lb of high quality bud can go for $1200-2000 (all info from Erowid), and you need 1.3 or so lb, that would be quite an investment). Monkeys show higher lethal threshold values (but no data on inhalation).
After all that, my points being (here referring to the "drug"):
1 Cannabis is much less health damaging then tobacco or alcohol, especially if vaporised
2 Cannabis is much less judgement inhibiting and motor-sensory inhibiting then alcohol
3 Cannabis is much safer of a drug with regard to ODing then alcohol or any orther "illegal drug"
4 Cannabis does not effect areas of the brain that are responsible fo body's vital functions, unlike alcohol
And to answer 3 questions that will come out of that post, "no i dont", "yes i have" and "yes it should, and it still wont make me run to the store and get some"
References:
1 -
Physiology / Alcohol and the Human Body / Alcohol Properties
2 -
Wikipedia, the free encyclopedia
3 -
Erowid