From Wikipedia: "A drug is a substance which may have medicinal, intoxicating, performance enhancing or other effects when taken or put into a human body[...]"
Caffeine is a drug
Tobacco (nicotine) is a drug
Aspirin is a drug
Zoloft is a drug
Weed is a drug (doesn't matter if it comes from the ground or not)
Heroin is a drug
Hard to believe some things we consume every day are drugs! We live in a world of drugs, which is why the "War on Drugs" is a lost cause. 1,000 pounds of marijuana taken off the street is nothing but a minor inconvenience these days.
Did you know your body produces DMT, an extremely powerful psychedelic?