Define the word drug

Define the word drug DEFAULT

Meaning of drug in English

One prerequisite is a rigorous evaluation of the new drugs' quality, efficacy, and safety.

From the Cambridge English Corpus

The nearer that this model is approached, the more successful a purely quantitative approach will be, as in drug trials.

From the Cambridge English Corpus

These regulations and requirements have a major impact on the research and development of new drugs.

From the Cambridge English Corpus

Many of the above studies have reported mixed results in the efficacies of the drugs against these other helminth species.

From the Cambridge English Corpus

Indeed, patients were often reluctant to be prescribed a detoxification drug which had not led to them successfully achieving abstinence in the past.

From the Cambridge English Corpus

These improvements could also complement and even enhance the benefits of drugs that help with the symptoms of dementia.

From the Cambridge English Corpus

This research falls under two main themes (i) assessing the societal value of orphan drugs and (ii) funding the development and use of orphan drugs.

From the Cambridge English Corpus

These and other new drugs substantially increased the costs for cytostatic drugs during the s.

From the Cambridge English Corpus

Many patients need to take several different drugs for single or multiple conditions with an increasing chance of suffering harmful interactions or side effects.

From the Cambridge English Corpus

In the following we highlight information on the molecular targets and actions of two classes of drugs, psychostimulants and opiates.

From the Cambridge English Corpus

The first risk is mistakenly recommending widespread use of the drug, when the drug is not truly effective.

From the Cambridge English Corpus

The cost of devices is such that, unlike drug samples, they can rarely be supplied free in clinical trials.

From the Cambridge English Corpus

See all examples of drug

These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.



What Is a Drug?

A drug, or pharmaceutical, is a substance used to prevent or cure a disease or ailment or to alleviate its symptoms. In the U.S., some drugs are available over-the-counter while others can be purchased only with a doctor's prescription. Drugs can be taken orally, via a skin patch, by injection, or via an inhaler, to name the most common methods.

The pharmaceutical industry, which is concerned with the development and marketing of drugs, is a key component of the health sector, which is the most profitable industry in the U.S. economy at an estimated $ billion in revenues in Prescription drugs are considered zero-rated goods.

A drug may also refer to an illegal or restricted substance used by individuals recreationally or to get high.

Key Takeaways

  • Drug development and marketing is a key component of the health sector, which is the most profitable U.S. industry at $ billion in revenues in
  • A new drug can be patented for 20 years after its discovery or invention.
  • After 20 years, generic equivalents can be sold at lower prices.

Understanding Drugs

The development of new and improved drugs, or pharmaceuticals, is a complex and costly business in the U.S. Some of the biggest American corporations, such as Johnson & Johnson, Pfizer, Merck, and Eli Lilly, are in the business of researching, testing, manufacturing, and marketing new drugs.

In addition, biotechnology has evolved in recent years as a major new branch of the drug business. Biotechnology companies concentrate on research and development (R&D) of new cures based on genetic manipulation. The big players in the field include Amgen, Gilead Sciences, and Celgene Corp.

In the United States, prescription drugs must be approved by the Food and Drug Administration (FDA). The agency's Center for Drug Evaluation and Research (CDER) acts as a consumer watchdog.

How Drugs Get to the Market

On average, it takes about 10 years and costs about $ billion for a new drug to make it from its initial discovery to a doctor's office, according to an industry group. The process has five main stages, including three phases of clinical trials:

In the development and discovery phase, researchers explore new possibilities. They may investigate unexpected effects of existing drugs, test new molecular compounds, or create new technologies that allow drugs to work differently in the body.

In the preclinical research phase, when a potential new drug is identified, researchers determine the correct dosages and methods of administration, side effects, interactions with other drugs, and effectiveness. They also study the drug’s absorption, metabolization, and excretion characteristics.

Fast Fact

The estimated cost of getting a new drug from the research lab to the doctor's office is $ billion.

Clinical Trials

In the clinical research phase, the company first tests the substance in the lab, or "in vitro," and sometimes on animals, or "in vivo." Depending on the outcome, the drug may then be tested on human subjects in clinical trials to determine whether it is safe and effective.

The phase 1 clinical trial or study is the first phase in the long and grueling process of drug approval. While the primary objective of phase 1 studies is to establish the safety profile of the investigational drug, these studies also enable vital information about the drug’s effects and chemistry to be collated. This information can be used to facilitate the design of well-controlled and scientifically valid phase 2 studies, the next step in the drug development process. 

Phase 2 in the clinical trial process focuses on how effective the drug is. Phase 3 trials are used to compare the treatment of the new drug to the current established treatment of the medical problem. A follow-up Phase 4 may be conducted that looks at the effects of the drug on the population after it has been approved by the FDA. All phases of a clinical trial only begin after the extensive research and development (R&D) phase of pharmaceutical companies, which can be lengthy and costly.

A drug that passes that hurdle is submitted to the CDER for review. The agency employs pharmacologists, chemists, statisticians, physicians, and other scientists who conduct an independent and unbiased review of the drug and the documentation submitted with it. That process typically takes six to 10 months to complete.

The drug company will be allowed to sell the drug if the CDER determines that the drug’s benefits outweigh its risks. It is then responsible for monitoring reports on the drug's effectiveness and unanticipated side effects.

Name Brand vs. Generic Drugs

Drugs sold in the U.S. may be name-brand or generic. A name-brand drug can be patented for 20 years after its discovery or invention. Once the patent expires, other manufacturers can produce and market generic equivalents of that drug.

Generic equivalents are increasingly prescribed as they become available in the U.S. because of their relatively low cost. Generics are required to have the same medicinal ingredients, and therefore the same therapeutic effects, to receive FDA approval for sale as substitutes.

Drug Prices

The price of prescription drugs is a source of great financial stress for many Americans, and therefore it has become one of the biggest political issues of the era. Health insurance prevents many Americans from bearing the full brunt of retail drug prices, though the coverage varies widely. In any case, drug costs are a major factor in the increase in health insurance premiums.

The most expensive prescription drugs in , according to, a healthcare website, include Actimmune, an osteoporosis treatment, at $52, per month; Myalept, a treatment for lipodystrophy, at $46, per month; and Daraprim, an anti-parasitic, at $45, per month.

  1. Maren morris politics
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noun, plural: drugs
(1) Any chemical substance administered for therapeutic purposes, diagnosis, prevention of diseases, and relieving symptoms
(2) A chemical substance that is intended to alter a biochemical process for a particular purpose
(3) A psychoactive substance
A drug is a chemical substance that is administered or taken to incite a biological effect in the body of an organism. It may be pharmacological in nature (used for health-related purposes) or recreational (which are mostly psychoactive). Drugs render biological effects depending on their composition, dosage, and route of administration. Some of them contain a single active ingredient whereas others are a mix of various chemicals in a single unit. The ingredients may be synthesized or derived biologically (e.g. herbal, marine-derived, animal-derived, microbial, genetic engineering, etc.) or chemically. Drugs for medical purposes can also be classified based on their biological effects: antipyretics, analgesics, antibiotics, antiseptics, hormone replacements, oral contraceptives, stimulants, tranquilizers, statins, etc.
Word origin: Middle English drogge (medicine)
See also:

Related term(s):

  • abnormalities drug-induced
  • activity drug
  • antiretroviral drug
  • cholinergic drug
  • drug resistance multiple
  • drug resistance neoplasm
  • drug resistant
  • drug screening
  • drug screening assays antitumour
  • drug side effect
  • food and drug administration
  • investigational new drug
  • investigational new drug application
  • maintenance drug therapy
  • parasympathomimetic drug
  • peak plasma drug concentration
  • prescription drug
  • rational drug design
  • street drug
  • Last updated on July 28th,

    Alan Walker - All Falls Down (feat. Noah Cyrus with Digital Farm Animals)


    Substance having an effect on the body

    For other uses, see Drug (disambiguation).

    A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed.[3][4] Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via inhalation, injection, smoking, ingestion, absorption via a patch on the skin, suppository, or dissolution under the tongue.

    In pharmacology, a drug is a chemical substance, typically of known structure, which, when administered to a living organism, produces a biological effect.[5] 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.[3] Traditionally drugs were obtained through extraction from medicinal plants, but more recently also by organic synthesis.[6] Pharmaceutical drugs may be used for a limited duration, or on a regular basis for chronic disorders.[7]

    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.[8][9] 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. Another major classification system is the Biopharmaceutics Classification System. This classifies drugs according to their solubility and permeability or absorption properties.[10]

    Psychoactive drugs are chemical substances that affect the function of the central nervous system, altering perception, mood or consciousness.[11] These drugs are divided into different groups like: stimulants, depressants, antidepressants, anxiolytics, antipsychotics, and hallucinogens. These psychoactive drugs have been proven useful in treating wide range of medical conditions including mental disorders around the world. The most widely used drugs in the world include caffeine, nicotine and alcohol,[12] which are also considered recreational drugs, since they are used for pleasure rather than medicinal purposes.[13] All drugs can have potential side effects. Abuse of several psychoactive drugs can cause addiction and/or physical dependence.[15] Excessive use of stimulants can promote stimulant psychosis. Many recreational drugs are illicit and international treaties such as the Single Convention on Narcotic Drugs exist for the purpose of their prohibition.


    In English, the noun "drug" is thought to originate from Old French "drogue", possibly deriving from "droge (vate)" from Middle Dutch meaning "dry (barrels)", referring to medicinal plants preserved as dry matter in barrels.[16][17]


    Main articles: Pharmaceutical drug, Drug class, and Medication

    A medication or medicine is a drug taken to cure or ameliorate any symptoms of an illness or medical condition. The use may also be as preventive medicine that has future benefits but does not treat any existing or pre-existing diseases or symptoms. 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.[18]

    In the United Kingdom, behind-the-counter medicines are called pharmacy medicines which can only be sold in registered pharmacies, by or under the supervision of a pharmacist. These medications are designated by the letter P on the label.[19] The range of medicines available without a prescription varies from country to country. Medications are typically produced by pharmaceutical companies and are often patented to give the developer exclusive rights to produce them. Those that are not patented (or with expired patents) are called generic drugs since they can be produced by other companies without restrictions or licenses from the patent holder.[20]

    Pharmaceutical drugs are usually categorised into drug classes. A group of drugs will share a similar chemical structure, or have the same mechanism of action, the same related mode of action or target the same illness or related illnesses.[8][9] 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. Another major classification system is the Biopharmaceutics Classification System. This groups drugs according to their solubility and permeability or absorption properties.[10]

    Spiritual and religious use

    Main article: Entheogen

    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. Some drugs used as entheogens include kava which can act as a stimulant, a sedative, a euphoriant and an anesthetic. The roots of the kava plant are used to produce a drink which is consumed throughout the cultures of the Pacific Ocean.

    Some shamans from different cultures use entheogens, defined as "generating the divine within"[21] to achieve religious ecstasy. Amazonian shamans use ayahuasca (yagé) a hallucinogenic brew for this purpose. Mazatec shamans have a long and continuous tradition of religious use of Salvia divinorum a psychoactive plant. Its use is to facilitate visionary states of consciousness during spiritual healing sessions.[22]

    Silene undulata is regarded by the Xhosa people as a sacred plant and used as an entheogen. Its roots are traditionally used to induce vivid (and according to the Xhosa, prophetic) lucid dreams during the initiation process of shamans, classifying it a naturally occurring oneirogen similar to the more well-known dream herb Calea ternifolia.[23]

    Peyote a small spineless cactus has been a major source of psychedelic mescaline and has probably been used by Native Americans for at least five thousand years.[24][25] Most mescaline is now obtained from a few species of columnar cacti in particular from San Pedro and not from the vulnerable peyote.[26]

    The entheogenic use of cannabis has also been widely practised[27] for centuries.[28]Rastafari use marijuana (ganja) as a sacrament in their religious ceremonies.

    Psychedelic mushrooms (psilocybin mushrooms), commonly called magic mushrooms or shrooms have also long been used as entheogens.

    Smart drugs and designer drugs

    Main articles: Nootropic, Designer drug, and Psychoactive drug

    Nootropics, also commonly referred to as "smart drugs", are drugs that are claimed to improve human cognitive abilities. Nootropics are used to improve memory, concentration, thought, mood, and learning. An increasingly used nootropic among students, also known as a study drug, is methylphenidate branded commonly as Ritalin and used for the treatment of attention deficit hyperactivity disorder (ADHD) and narcolepsy.[29] At high doses methylphenidate can become highly addictive.[30] Serious addiction can lead to psychosis, anxiety and heart problems, and the use of this drug is related to a rise in suicides, and overdoses. Evidence for use outside of student settings is limited but suggests that it is commonplace.[29][30] Intravenous use of methylphenidate can lead to emphysematous damage to the lungs, known as Ritalin lung.[31]

    Other drugs known as designer drugs are produced. An early example of what today would be labelled a 'designer drug' was LSD, which was synthesised from ergot.[32] Other examples include analogs of performance-enhancing drugs such as designer steroids taken to improve physical capabilities and these are sometimes used (legally or not) for this purpose, often by professional athletes.[33] Other designer drugs mimic the effects of psychoactive drugs. Since the late s there has been the identification of many of these synthesised drugs. In Japan and the United Kingdom this has spurred the addition of many designer drugs into a newer class of controlled substances known as a temporary class drug.

    Synthetic cannabinoids have been produced for a longer period of time and are used in the designer drug synthetic cannabis.

    Recreational drug use

    Main article: Recreational drug use

    Further information: Prohibition of drugs

    Recreational drug use is the use of a drug (legal, controlled, or illegal) with the primary intention of altering the state of consciousness through alteration of the central nervous system in order to create positive emotions and feelings. The hallucinogen LSD is a psychoactive drug commonly used as a recreational drug.[35]

    Some national laws prohibit the use of different recreational drugs; and medicinal drugs that have the potential for recreational use are often heavily regulated. However, there are many recreational drugs that are legal in many jurisdictions and widely culturally accepted. Cannabis is the most commonly consumed controlled recreational drug in the world (as of ).[36] Its use in many countries is illegal but is legally used in several countries usually with the proviso that it can only be used for personal use. It can be used in the leaf form of marijuana(grass), or in the resin form of hashish. Marijuana is a more mild form of cannabis than hashish.

    There may be an age restriction on the consumption and purchase of legal recreational drugs. Some recreational drugs that are legal and accepted in many places include alcohol, tobacco, betel nut, and caffeine products, and in some areas of the world the legal use of drugs such as khat is common.[37]

    There are a number of legal intoxicants commonly called legal highs that are used recreationally. The most widely used of these is alcohol.

    Administration of drugs

    Main article: Route of administration

    All drugs, can be administered via a number of routes, and many can be administered by more than one.

    • Bolus is the administration of a medication, drug or other compound that is given to raise its concentration in blood to an effective level. The administration can be given intravenously, by parenteral,by indovenous, by intramuscular, intrathecal or subcutaneous injection.
    • Inhaled, (breathed into the lungs), as an aerosol, inhaler, vape or dry powder (this includes smoking or vaping a substance).
    • Injection as a solution, suspension or emulsion either: intramuscular, intravenous, intraperitoneal, intraosseous.
    • Insufflation, as a nasal spray or snorting into the nose.
    • Orally, as a liquid or solid, that is absorbed through the intestines.
    • Rectally as a suppository, that is absorbed by the rectum or colon.
    • Sublingually, diffusing into the blood through tissues under the tongue.
    • Topically, usually as a cream or ointment. A drug administered in this manner may be given to act locally or systemically.[38]
    • Vaginally as a pessary, primarily to treat vaginal infections.

    Control of drugs

    There are numerous governmental offices in many countries that deal with the control and oversee of drug manufacture and use, and the implementation of various drug laws. The Single Convention on Narcotic Drugs is an international treaty brought about in to prohibit the use of narcotics save for those used in medical research and treatment. In , a second treaty the Convention on Psychotropic Substances had to be introduced to deal with newer recreational psychoactive and psychedelic drugs.

    The legal status of Salvia divinorum varies in many countries and even in states within the United States. Where it is legislated against the degree of prohibition also varies.

    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-countermedications, vaccines, biopharmaceuticals, blood transfusions, medical devices, electromagnetic radiation emitting devices, cosmetics, animal foods[39] and veterinary drugs.

    In India, the Narcotics Control Bureau (abbr. NCB) ,an Indian federal law enforcement and intelligence agency under the Ministry of Home Affairs, Government of India is tasked with combating drug trafficking and assisting international use of illegal substances under the provisions of Narcotic Drugs and Psychotropic Substances Act.[40]

    See also

    Lists of drugs


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    2. ^Richard Lovett (24 September ). "Coffee: The demon drink?". Archived from the original on 11 April Retrieved
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    4. ^"Drug Definition". Stedman's Medical Dictionary. Archived from the original on Retrieved &#; via
    5. ^H.P., Rang; M.M, Dale; J.M., Ritter; R.J., Flower; G., Henderson (). "What is Pharmacology". Rang & Dale's pharmacology (7th&#;ed.). Edinburgh: Churchill Livingstone. p.&#;1. ISBN&#;.
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    8. ^ abMahoney A, Evans J (6 November ). "Comparing drug classification systems". AMIA Annual Symposium Proceedings: PMID&#;
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    10. ^ abBergström, CA; Andersson, SB; Fagerberg, JH; Ragnarsson, G; Lindahl, A (16 June ). "Is the full potential of the biopharmaceutics classification system reached?". European Journal of Pharmaceutical Sciences. 57: – doi/j.ejps PMID&#;
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    14. ^Fox, Thomas Peter; Oliver, Govind; Ellis, Sophie Marie (). "The Destructive Capacity of Drug Abuse: An Overview Exploring the Harmful Potential of Drug Abuse Both to the Individual and to Society". ISRN Addiction. : doi// PMC&#; PMID&#;
    15. ^Harper, Douglas. "drug". Online Etymology Dictionary.
    16. ^Tupper KW (). "Psychoactive substances and the English language: "Drugs," discourses, and public policy". Contemporary Drug Problems. 39 (3): – doi/ S2CID&#;
    17. ^"About Registration: Medicines and Prescribing". Health and Care Professions Council. Archived from the original on Retrieved 22 January
    18. ^"Glossary of MHRA terms – P". U.K. Medicines and Healthcare products Regulatory Agency. Archived from the original on Retrieved
    19. ^""Generic Drugs", Center for Drug Evaluation and Research, U.S. Food and Drug Administration"(PDF). Archived(PDF) from the original on 29 August Retrieved 11 October
    20. ^Entheogen, [], archived from the original on , retrieved
    21. ^Valdés, Díaz & Paul , p.&#;
    22. ^Sobiecki, Jean-Francois (July ). "Psychoactive Spiritual Medicines and Healing Dynamics in the Initiation Process of Southern Bantu Diviners". Journal of Psychoactive Drugs. 44 (3): – doi/ PMID&#; S2CID&#;
    23. ^El-Seedi HR, De Smet PA, Beck O, Possnert G, Bruhn JG (October ). "Prehistoric peyote use: alkaloid analysis and radiocarbon dating of archaeological specimens of Lophophora from Texas". J Ethnopharmacol. (1–3): – doi/j.jep PMID&#;
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    25. ^Terry M (). "Lophophora williamsii". IUCN Red List of Threatened Species. . doi/IUCN.UKRLTS.TAen. Retrieved
    26. ^Souza, Rafael Sampaio Octaviano de; Albuquerque, Ulysses Paulino de; Monteiro, Júlio Marcelino; Amorim, Elba Lúcia Cavalcanti de (October ). "Jurema-Preta (Mimosa tenuiflora [Willd.] Poir.): a review of its traditional use, phytochemistry and pharmacology". Brazilian Archives of Biology and Technology. 51 (5): – doi/S
    27. ^Bloomquist, Edward (). Marijuana: The Second Trip. California: Glencoe.
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    36. ^Al-Mugahed, Leen (). "Khat Chewing in Yemen: Turning over a New Leaf: Khat Chewing Is on the Rise in Yemen, Raising Concerns about the Health and Social Consequences". Bulletin of the World Health Organization. 86 (10): –2. doi/BLT PMC&#; PMID&#; Archived from the original on 10 March Retrieved 22 January
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    Further reading

    • Richard J. Miller (). Drugged: the science and culture behind psychotropic drugs. Oxford University Press. ISBN&#;.

    External links

    • DrugBank, a database of 13, drugs and 5, protein drug targets
    • "Drugs", BBC Radio 4 discussion with Richard Davenport-Hines, Sadie Plant and Mike Jay (In Our Time, May 23, )
    Wikimedia Commons has media related to Drugs.

    The word drug define

    \ ˈdrəgHow to pronounce drug (audio)\

    Definition of drug

     (Entry 1 of 3)

    1a: a substance used as a medication or in the preparation of medication
    baccording to the Food, Drug, and Cosmetic Act
    (2): a substance intended for use in the diagnosis, cure, mitigation, treatment, or prevention of diseaseprescription drugsdrugs for treating high blood pressure
    (3): a substance other than food intended to affect the structure or function of the body
    (4): a substance intended for use as a component of a medicine but not a device or a component, part, or accessory of a device
    2: something and often an illegal substance that causes addiction, habituation (see habituationsense 2b), or a marked change in consciousnesskeeping teens off drugsheroin and other hard drugs
    4obsolete : a substance used in dyeing or chemical operations

    Definition of drug (Entry 2 of 3)

    transitive verb

    2: to administer a drug todrugged against pain
    3: to lull or stupefy as if with a drugthe kind of overly familiar music that delights most audiences and drugs most critics — Time

    Definition of drug (Entry 3 of 3)

    dialectal past tense ofdrag

    Definition Of 'Drug' as per WHO


    This shows grade level based on the word's complexity.



    Pharmacology. a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being.

    (in federal law)
    1. any substance recognized in the official pharmacopoeia or formulary of the nation.
    2. any substance intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease in humans or other animals.
    3. any article, other than food, intended to affect the structure or any function of the body of humans or other animals.
    4. any substance intended for use as a component of such a drug, but not a device or a part of a device.

    a habit-forming medicinal or illicit substance, especially a narcotic.

    1. chemical substances prepared and sold as pharmaceutical items, either by prescription or over the counter.
    2. personal hygienic items sold in a drugstore, as toothpaste, mouthwash, etc.

    Obsolete. any ingredient used in chemistry, pharmacy, dyeing, or the like.

    verb (used with object),drugged,drug·ging.

    to administer a medicinal drug to.

    to stupefy or poison with a drug.

    to mix (food or drink) with a drug, especially a stupefying, narcotic, or poisonous drug.

    to administer anything nauseous to.

    Verb Phrases

    drug up,Informal. to take a drug, especially an illegal drug: kids hiding under the school bleachers to drug up;athletes who drug up in the off-season.



    We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.

    Question 1 of 8

    Which of the following words describes “sky blue”?

    Idioms about drug

      drug on the market, a commodity that is overabundant or in excess of demand in the market.Also drug in the market.

    Origin of drug


    First recorded in –50; Middle English drogges (plural), from Middle French drogue, of obscure origin

    Words nearby drug

    drubbing, Drucilla, drudge, drudgery, drudgework, drug, drug abuse, drug addict, drug baron, drug-driver, drug-driving

    Other definitions for drug (2 of 3)

    verbNonstandard: Chiefly Midland and Southern U.S.

    a simple past tense and past participle of drag.

    Other definitions for drug (3 of 3)


    the cosmic principle of disorder and falsehood.

    Compare Asha.

    Origin of Drug

    From the Avestan word drauga Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc.

    Words related to drug

    pharmaceutical, prescription, poison, narcotic, remedy, cure, medicine, pill, stimulant, medicate, dope, sedate, tonic, potion, sedative, opiate, essence, medicament, depressant, physic

    How to use drug in a sentence

    • Earlier this year, the US Congress passed the Coronavirus Aid, Relief and Economic Security Act, which requires manufacturers to report real or potential drug shortages to the FDA.

      The ‘inactive' ingredients in your pills could harm you|By Yelena Ionova/The Conversation|September 15, |Popular-Science

    • A passing off-duty school safety officer named Fred Lucas said that he had been told the man was a drug dealer.

      Shot Down During the NYPD Slowdown|Michael Daly|January 7, |DAILY BEAST

    • Did he go to the authorities to file a report against the Guerreros Unidos drug cartel?

      Mexico’s Priests Are Marked for Murder|Jason McGahan|January 7, |DAILY BEAST

    • He also was working to recruit Castro as a driver for a drug load.

      An Informant, a Missing American, and Juarez’s House of Death: Inside the Year Cold Case of David Castro|Bill Conroy|January 6, |DAILY BEAST

    • And so the same creeping rot of the rule of law that the administration has inflicted on immigration now bedevils our drug laws.

      Obama’s Pot Policy Is Refer Madness|James Poulos|January 5, |DAILY BEAST

    • “They know there are drug spots,” said Wanda Williams, who was out for a walk with her son.

      Ground Zero of the NYPD Slowdown|Batya Ungar-Sargon|January 1, |DAILY BEAST

    • But green Chartreuse unhappily is not innocent; it is more than a spirit, it is a powerful drug.

      The Pit Town Coronet, Volume I (of 3)|Charles James Wills

    • Five years later he was drawing a large salary, and at the age of thirty he had opened a retail drug store of his own.

      Ancestors|Gertrude Atherton

    • Each cachet contained three decigrams of malourea, the insidious drug notorious under its trade name of Veronal.

      Dope|Sax Rohmer

    • Then the drug was coaxed between the stricken man's teeth, and presently he opened his eyes once more.

      The Weight of the Crown|Fred M. White

    • Rashid, the attendant, knew all Kazmah's clients, and with the box or flask he gave them a quantity of the required drug.

      Dope|Sax Rohmer

    British Dictionary definitions for drug


    any synthetic, semisynthetic, or natural chemical substance used in the treatment, prevention, or diagnosis of disease, or for other medical reasonsRelated adjective: pharmaceutical

    a chemical substance, esp a narcotic, taken for the pleasant effects it produces

    drug on the marketa commodity available in excess of the demands of the market

    verbdrugs, druggingordrugged(tr)

    to mix a drug with (food, drink, etc)

    to administer a drug to

    to stupefy or poison with or as if with a drug

    Other words from drug

    Related prefix: pharmaco-

    Derived forms of drug

    druggy, adjective

    Word Origin for drug

    C from Old French drogue, probably of Germanic origin

    Collins English Dictionary - Complete & Unabridged Digital Edition © William Collins Sons & Co. Ltd. , © HarperCollins Publishers , , , , , , ,

    Medical definitions for drug


    A substance used in the diagnosis, treatment, or prevention of a disease or as a component of a medication.

    Such a substance as recognized or defined by the US Food and Drug Administration.

    A chemical substance, such as a narcotic or hallucinogen, that affects the central nervous system, causing changes in behavior and often addiction.


    To administer a drug, especially in an overly large quantity, to an individual.

    To stupefy or dull with or as if with a drug; to narcotize.

    The American Heritage® Stedman's Medical Dictionary Copyright © , , by Houghton Mifflin Company. Published by Houghton Mifflin Company.

    Scientific definitions for drug

    A chemical substance, especially one prescribed by a medical provider, that is used in the diagnosis, treatment, or prevention of a condition or disease. Drugs are prescribed for a limited amount of time, as for an acute infection, or on a regular basis for chronic disorders, such as hypertension.

    A chemical substance such as a narcotic or a hallucinogen that affects the central nervous system and is used recreationally for perceived desirable effects on personality, perception, or behavior. Many recreational drugs are used illicitly and can be addictive.

    The American Heritage® Science Dictionary Copyright © Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


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