Alcohol has resulted in more death, injury and destruction than many others around the world.
Nicotine
The most addictive drug, which does the most damage to your body is heroin. To view a graph of drugs from least to most harmful, go to the link below. http://upload.wikimedia.org/wikipedia/commons/e/e4/Rational_scale_to_assess_the_harm_of_drugs_%28mean_physical_harm_and_mean_dependence%29_nl.svg
It is difficult to determine the most harmful psychoactive drug as the impact can vary based on individual factors. However, substances like methamphetamine, heroin, and synthetic cannabinoids are known to be highly addictive and have serious health consequences.
No, it might be the most common illegal drug, but caffeine is the most common drug. Yes, caffeine is a drug.
Your Best friend usually. They have the biggest Influence on you.
the most harmful disease in the world is cancer (it kills the most people).
Ceredase
No, this could be harmful to the drug
THC
Man.
Alcohol is the oldest drug known to man, and also the most widely-used drug. So, I would imagine it is the most widely-abused drug, as well.
meth!