A drug is, in the broadest of terms, a chemical substance that has known biological effects on humans or other animals.[5] Foods are generally excluded from this definition, in spite of their physiological effects on animal species.[6][7][8]
In pharmacology, a drug is "a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being."[6] Pharmaceutical drugs may be used for a limited duration, or on a regular basis for chronic disorders.[9]
Psychoactive drugs are chemical substances that affect the function of the nervous system, altering perception, mood or consciousness.[10] Alcohol, nicotine, and caffeine are the most widely consumed psychoactive drugs worldwide.[11]
Recreational drugs are drugs that are not used for medicinal purposes, but are instead used for pleasure.[12] Common recreational drugs include alcohol, nicotine and caffeine, as well as other substances such as opiates and amphetamines.
Some drugs can cause addiction and habituation[citation needed] and all drugs can cause side effects.[13] Many drugs are illegal for recreational purposes and international treaties such as the Single Convention on Narcotic Drugs exist for the purpose of legally prohibiting certain substances.
A drug is, in the broadest of terms, a chemical substance that has known biological effects on humans or other animals.[5] Foods are generally excluded from this definition, in spite of their physiological effects on animal species.[6][7][8]
In pharmacology, a drug is "a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being."[6] Pharmaceutical drugs may be used for a limited duration, or on a regular basis for chronic disorders.[9]
Psychoactive drugs are chemical substances that affect the function of the nervous system, altering perception, mood or consciousness.[10] Alcohol, nicotine, and caffeine are the most widely consumed psychoactive drugs worldwide.[11]
Recreational drugs are drugs that are not used for medicinal purposes, but are instead used for pleasure.[12] Common recreational drugs include alcohol, nicotine and caffeine, as well as other substances such as opiates and amphetamines.
Some drugs can cause addiction and habituation[citation needed] and all drugs can cause side effects.[13] Many drugs are illegal for recreational purposes and international treaties such as the Single Convention on Narcotic Drugs exist for the purpose of legally prohibiting certain substances.
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