The joint is almost certainly safer. Marijuana has an exceptional toxicity ratio: 40,000 to 1.Also, I dont see what the advantage is of smoking a joint versus swollowing a prescription drug, if both contain the same agent, or an agent that works the same way.
Wrong.The only difference I see is that smoking a joint every day will most likely cause lung cancer after a few decades of doing so.
http://www.drugpolicy.org/marijuana/factsmyths/in a large study presented to the American Thoracic Society in 2006, even heavy users of smoked marijuana were found not to have any increased risk of lung cancer.
Actually, marijuana not only doesn't cause lung cancer, in some studies it is actually negatively correlated with it. That's right: it may help prevent lung cancer.
There are a variety of known physical reasons why tobacco does and marijuana does not cause cancer.