Drug

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A drug is any substance that causes a change in an organism's physiology or psychology when consumed.wikipedia
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Drug injection

intravenous drugintravenous drug useinjecting drug user
Consumption of drugs can be via inhalation, injection, smoking, ingestion, absorption via a patch on the skin, or dissolution under the tongue.
Drug injection is a method of introducing a drug into the bloodstream via a hollow hypodermic needle and a syringe, which is pierced through the skin into the body (usually intravenously, but also at an intramuscular or subcutaneous location).

Pharmacology

pharmacologistpharmacologicalpharmacologically
In pharmacology, a drug is a chemical substance, typically of known structure, which, when administered to a living organism, produces a biological effect.
Pharmacology is the branch of pharmaceutical sciences which is concerned with the study of drug or medication action, where a drug can be broadly defined as any man-made, natural, or endogenous (from within the body) molecule which exerts a biochemical or physiological effect on the cell, tissue, organ, or organism (sometimes the word pharmacon is used as a term to encompass these endogenous and exogenous bioactive species).

Medication

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A pharmaceutical drug, also called a medication or medicine, is a chemical substance used to treat, cure, prevent, or diagnose a disease or to promote well-being. The Food and Drug Administration (FDA) in the United States is a federal agency responsible for protecting and promoting public health through the regulation and supervision of food safety, tobacco products, dietary supplements, prescription and over-the-counter medications, vaccines, biopharmaceuticals, blood transfusions, medical devices, electromagnetic radiation emitting devices, cosmetics, animal foods and veterinary drugs.
A medication (also referred to as medicine, pharmaceutical drug, or simply drug) is a drug used to diagnose, cure, treat, or prevent disease.

Biological target

drug targettargettherapeutic target
Pharmaceutical drugs are often classified into drug classes—groups of related drugs that have similar chemical structures, the same mechanism of action (binding to the same biological target), a related mode of action, and that are used to treat the same disease.
A biological target is anything within a living organism to which some other entity (like an endogenous ligand or a drug) is directed and/or binds, resulting in a change in its behavior or function.

Anatomical Therapeutic Chemical Classification System

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The Anatomical Therapeutic Chemical Classification System (ATC), the most widely used drug classification system, assigns drugs a unique ATC code, which is an alphanumeric code that assigns it to specific drug classes within the ATC system.
The Anatomical Therapeutic Chemical (ATC) Classification System is a drug classification system that classifies the active ingredients of drugs according to the organ or system on which they act and their therapeutic, pharmacological and chemical properties.

Stimulant

stimulantspsychostimulantpsychostimulants
These drugs are divided into different groups like: stimulants, depressants, antidepressants, anxiolytics, antipsychotics, and hallucinogens. Some drugs used as entheogens include kava which can act as a stimulant, a sedative, a euphoriant and an anesthetic.
Stimulants (also often referred to as psychostimulants or colloquially as uppers) is an overarching term that covers many drugs including those that increase activity of the central nervous system and the body, drugs that are pleasurable and invigorating, or drugs that have sympathomimetic effects.

Depressant

depressantsdownerscentral depressant
These drugs are divided into different groups like: stimulants, depressants, antidepressants, anxiolytics, antipsychotics, and hallucinogens.
A depressant, or central depressant, is a drug that lowers neurotransmission levels, which is to depress or reduce arousal or stimulation, in various areas of the brain.

Side effect

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It's worth noting that all drugs can have potential side effects.
In medicine, a side effect is an effect, whether therapeutic or adverse, that is secondary to the one intended; although the term is predominantly employed to describe adverse effects, it can also apply to beneficial, but unintended, consequences of the use of a drug.

Illegal drug trade

drug traffickingdrug dealerdrug dealing
Many recreational drugs are illicit and international treaties such as the Single Convention on Narcotic Drugs exist for the purpose of their prohibition.
Most jurisdictions prohibit trade, except under license, of many types of drugs through the use of drug prohibition laws.

Pharmacy

pharmaciespharmaceutical sciencesdrugstore
Dispensing of medication is often regulated by governments into three categories—over-the-counter medications, which are available in pharmacies and supermarkets without special restrictions; behind-the-counter medicines, which are dispensed by a pharmacist without needing a doctor's prescription, and prescription only medicines, which must be prescribed by a licensed medical professional, usually a physician.
Pharmacy is the science and technique of preparing, dispensing, and reviewing drugs and providing additional clinical services.

Pharmaceutical industry

pharmaceutical companypharmaceuticalpharmaceutical companies
Medications are typically produced by pharmaceutical companies and are often patented to give the developer exclusive rights to produce them.
The pharmaceutical industry discovers, develops, produces, and markets drugs or pharmaceutical drugs for use as medications to be administered (or self-administered) to patients, with the aim to cure them, vaccinate them, or alleviate the symptoms.

Psychedelic drug

psychedelicpsychedelicspsychedelic drugs
Some religions, particularly ethnic religions are based completely on the use of certain drugs, known as entheogens, which are mostly hallucinogens,—psychedelics, dissociatives, or deliriants.
Psychedelics are a class of drug whose primary action is to trigger psychedelic experiences via serotonin receptor agonism, causing thought and visual/auditory changes, and altered state of consciousness.

Anesthetic

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Some drugs used as entheogens include kava which can act as a stimulant, a sedative, a euphoriant and an anesthetic.
An anesthetic (American English) or anaesthetic (British English; [[American and British English spelling differences#Miscellaneous spelling differences|see spelling differences]]) is a drug used to induce anesthesia ⁠— ⁠in other words, to result in a temporary loss of sensation or awareness.

Antidepressant

antidepressantsanti-depressantanti-depressants
These drugs are divided into different groups like: stimulants, depressants, antidepressants, anxiolytics, antipsychotics, and hallucinogens.
Serotonin modulator and stimulators (SMSs), sometimes referred to more simply as "serotonin modulators", are a type of drug with a multimodal action specific to the serotonin neurotransmitter system.

Nootropic

nootropicscognitive enhancersmart drugs
Nootropics, also commonly referred to as "smart drugs", are drugs that are claimed to improve human cognitive abilities.
Nootropics (colloquial: smart drugs and cognitive enhancers) are drugs, supplements, and other substances that may improve cognitive function, particularly executive functions, memory, creativity, or motivation, in healthy individuals.

Prohibition of drugs

illegal drugsillegal drugdrug prohibition
Many recreational drugs are illicit and international treaties such as the Single Convention on Narcotic Drugs exist for the purpose of their prohibition.
The cultivation, use, and trade of psychoactive and other drugs has occurred since ancient times.

Convention on Psychotropic Substances

Schedule IVamphetamine-type stimulantsSchedule I
In 1971, a second treaty the Convention on Psychotropic Substances had to be introduced to deal with newer recreational psychoactive and psychedelic drugs.
The Single Convention on Narcotic Drugs of 1961 did not ban the many newly discovered psychotropics, since its scope was limited to drugs with cannabis, coca, and opium-like effects.

Pharmacognosy

pharmacognosistpharmacognocistPharmacognosis
Pharmacognosy is the study of plants or other natural sources as a possible source of drugs.

Biopharmaceutical

biologicsbiopharmaceuticalsbiologic
The Food and Drug Administration (FDA) in the United States is a federal agency responsible for protecting and promoting public health through the regulation and supervision of food safety, tobacco products, dietary supplements, prescription and over-the-counter medications, vaccines, biopharmaceuticals, blood transfusions, medical devices, electromagnetic radiation emitting devices, cosmetics, animal foods and veterinary drugs.
Some regulatory agencies use the terms biological medicinal products or therapeutic biological product to refer specifically to engineered macromolecular products like protein- and nucleic acid-based drugs, distinguishing them from products like blood, blood components, or vaccines, which are usually extracted directly from a biological source.

Inverse benefit law

The inverse benefit law states that the ratio of benefits to harms among patients taking new drugs tends to vary inversely with how extensively a drug is marketed.

Psychoactive drug

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Psychoactive drugs are chemical substances that affect the function of the central nervous system, altering perception, mood or consciousness.

Chemical substance

chemicalchemicalssubstance
A drug is any substance that causes a change in an organism's physiology or psychology when consumed.

Physiology

physiologistphysiologicalphysiologically
A drug is any substance that causes a change in an organism's physiology or psychology when consumed.

Psychology

psychologicalpsychologistpsychologists
A drug is any substance that causes a change in an organism's physiology or psychology when consumed.