It depends largely on the person. One drug may be harmless to one person but could kill another at the same dose (i.e a healthy person takes amphetamines and suffers no ill effects but another with heart problems takes the same dose and has a heart attack). I'd say inhalants are the most harmful as it's impossible to abuse inhalants without causing physical damage.
Nicotine
the most harmful is carbon dioxide.
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
The harmful effects of Drug Addiction include changes to the user's brain, body, and sprit. Addictive drugs enter the body through a variety of routes. The drugs then make their way to the bloodstream and go straight to the brain, where they exert their harmful effects.
because the chemicals and acids in the drug is harmful to the human body so that why diseases come.
You have to show the circus of a government we have that the drug is safe Nd that it does not have any harmful effects on the human body.
Of course not! Many cure diseases. Any drug that is used and abused more than prescribed can be harmful to your body. Cold medicine, flu medicine, tums, cough syrup, Tylenol, even vitamins!
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.
heroin or ecstasy most likely
A drug, by definition, is any substance altering the physical or mental state of your body. That being said, an antibiotic is a drug, but in most cases, isn't harmful to the body as it is prescribed by a professional in the field.
Your Best friend usually. They have the biggest Influence on you.
THC