is tobacco a hard drug How scientists rank drugs from most to least dangerous — and why the rankings are flawed here's why nicotine is one

here's why nicotine is one of the toughest addictions to break it reaches your brain in just 8 seconds. That's faster than any drug taken orally, and it's the reason cigarettes Why Nicotine is a Gateway Drug National Institutes of Health (NIH) Psychoactive drug Wikipedia New Study Finds Marijuana Safer Than Alcohol Or Tobacco IFLScience Comparative risk assessment of alcohol, tobacco, cannabis and other illicit drugs using the margin of exposure approach Scientific Reports

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