A drug is a medicine. Before you travel to India, your doctor may prescribe a drug to protect you from getting malaria.

A substance that makes a change in your body is a drug. Most often, a drug is medicine prescribed by a doctor to protect a patient from illness, cure them, or relieve their pain. Drug also means an illegal substance taken simply for the way it makes the user feel. Drug is also a verb that describes both taking illegal drugs and giving someone a drug secretly, such as slipping it into their food or drink.

Definitions of drug

n a substance that is used as a medicine or narcotic

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aborticide, abortifacient, abortion-inducing drug
a drug (or other chemical agent) that causes abortion
(biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction
anaesthetic, anaesthetic agent, anesthetic, anesthetic agent
a drug that causes temporary loss of bodily sensations
a drug that neutralizes or counteracts the effects of another drug
a drug (or other chemical agent) that is effective against syphilis
anti-TNF compound
a class of drugs that block the action of tumor necrosis factor (TNF); used in cases of rheumatoid arthritis because TNF instigates inflammation of the joints
a drug made from part of a plant (as the bark or root or leaves)
brand-name drug, proprietary drug
a drug that has a trade name and is protected by a patent (can be produced and sold only by the company holding the patent)
controlled substance
a drug or chemical substance whose possession and use are controlled by law
a drug that causes dilation
diuretic, diuretic drug, water pill
any substance that tends to increase the flow of urine, which causes the body to get rid of excess water
drug of abuse, street drug
a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction
trade name of a drug rich in iron; used to treat some kinds of anemia
trade name of a drug rich in iron; used to treat some types of anemia
fertility drug
a drug used to increase a woman's fertility
generic drug
when the patent protection for a brand-name drug expires generic versions of the drug can be offered for sale if the FDA agrees
a drug that can produce a state of intoxication
Lorfan, levallorphan
drug (trade name Lorfan) that is related to morphine but that counteracts the respiratory depression produced by morphine poisoning but without affecting its analgesic effects
medicament, medication, medicinal drug, medicine
(medicine) something that treats or prevents or alleviates the symptoms of disease
miotic, miotic drug, myotic, myotic drug
a drug that causes miosis (constriction of the pupil of the eye)
mydriatic, mydriatic drug
a drug that causes the pupil of the eye to dilate; used to aid eye examinations
a drug that produces numbness or stupor; often taken for pleasure or to reduce pain; extensive use can lead to addiction
Trental, pentoxifylline
a drug (trade name Trental) used to treat claudication; believed to increase the flexibility of red blood cells so they can flow through the blood vessels to the legs and feet
consciousness-altering drug, mind-altering drug, psychoactive drug, psychoactive substance
a drug that can produce mood changes and distorted perceptions
psychotropic agent
a chemical substance that can influence human consciousness
a drug that relaxes and relieves tension
hypnotic, soporific
a drug that induces sleep
excitant, stimulant, stimulant drug
a drug that temporarily quickens some vital process
appetite suppressant, suppressant
a drug that suppresses appetite
a drug that augments the activity of another drug
anti-impotence drug, virility drug
drug to treat impotence attributable to erectile dysfunction
a pesticide or drug containing arsenic
RU 486, abortion pill, mifepristone
an abortion-inducing drug (trade name RU_486) developed in France; when taken during the first five weeks of pregnancy it blocks the action of progesterone so that the uterus sloughs off the embryo
Zovirax, acyclovir
an oral antiviral drug (trade name Zovirax) used to treat genital herpes; does not cure the disease but relieves the symptoms
Fosamax, alendronate
a tablet (trade name Fosamax) prescribed to prevent or treat osteoporosis in women after menopause
Zyloprim, allopurinol
a drug (trade name Zyloprim) used to treat gout and other conditions in which there is an excessive buildup of uric acid
Inocor, amrinone
a drug (trade name Inocor) used intravenously in heart failure; increases strength of contraction of myocardium
a medication used as a stimulant to the central nervous system
analgesic, anodyne, pain pill, painkiller
a medicine used to relieve pain
angiogenesis inhibitor
a drug that is designed to prevent the growth of blood vessels that nourish tumors
antiarrhythmic, antiarrhythmic drug, antiarrhythmic medication
a drug used to treat an abnormal heart rhythm
antibacterial, antibacterial drug, bactericide
any drug that destroys bacteria or inhibits their growth
anticholinergic, anticholinergic drug
a substance that opposes or blocks the action of acetylcholine
a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect
anticoagulant, anticoagulant medication, decoagulant
medicine that prevents or retards the clotting of blood
anticonvulsant, anticonvulsant drug, antiepileptic, antiepileptic drug
a drug used to treat or prevent convulsions (as in epilepsy)
antidepressant, antidepressant drug
any of a class of drugs used to treat depression; often have undesirable side effects
antidiabetic, antidiabetic drug
a drug used to treat diabetes mellitus
antidiarrheal, antidiarrheal drug
a drug used to control or stop diarrhea
antidiuretic, antidiuretic drug
a drug that limits the formation of urine
antiemetic, antiemetic drug
a drug that prevents or alleviates nausea and vomiting
a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site
antihypertensive, antihypertensive drug
a drug that reduces high blood pressure
anti-inflammatory, anti-inflammatory drug
a medicine intended to reduce inflammation
antiprotozoal, antiprotozoal drug
a medicinal drug used to fight diseases (like malaria) that are caused by protozoa
antipyretic, febrifuge
any medicine that lowers body temperature to prevent or alleviate fever
a substance that destroys micro-organisms that carry disease without harming body tissues
antispasmodic, antispasmodic agent, spasmolytic
a drug used to relieve or prevent spasms (especially of the smooth muscles)
any medicine used to suppress or relieve coughing
antiviral, antiviral agent, antiviral drug
any drug that destroys viruses
a drug combination found in some over-the-counter headache remedies (aspirin and phenacetin and caffeine)
a drug or other agent that stimulates sexual desire
astringent, astringent drug, styptic
a drug that causes contraction of body tissues and canals
atomic cocktail
an oral dose of radioactive substance used in treatment and diagnosis of cancer
a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides
Imuran, azathioprine
an immunosuppressive drug (trade name Imuran) used to prevent rejection of a transplanted organ
blocker, blocking agent
a class of drugs that inhibit (block) some biological process
a drug that relaxes and dilates the bronchial passageways and improves the passages of air into the lungs
butyl nitrite, isobutyl nitrite
a colorless pungent liquid sometimes used as a stimulant drug by drug abusers
calcium blocker, calcium-channel blocker
any of a class of drugs that block the flow of the electrolyte calcium (either in nerve cell conduction or smooth muscle contraction of the heart); has been used in the treatment of angina or arrhythmia or hypertension or migraine
cannabis, ganja, marihuana, marijuana
the most commonly used illicit drug; considered a soft drug, it consists of the dried leaves of the hemp plant; smoked or chewed for euphoric effect
medication that prevents the formation of gas in the alimentary tract or eases its passing
Hygroton, Thalidone, chlorthalidone
a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks
Atromid-S, clofibrate
a drug (trade name Atromid-S) that reduces lipids in the blood serum; used to treat some cardiovascular diseases
Clomid, clomiphene, clomiphene citrate
a fertility drug (trade name Clomid) that is used to stimulate ovulation and that has been associated with multiple births
Plavix, clopidogrel bisulfate
a blood thinner (trade name Plavix) approved for the treatment of mild heart attacks; works by preventing blood platelets from sticking together to form clots that would restrict blood flow
club drug
a controlled substance that is usually taken by young people at dance clubs and raves
cold medicine
medicine intended to relieve the symptoms of the common cold
a medicine applied locally to produce superficial inflammation in order to reduce deeper inflammation
cytotoxic drug
any drug that has a toxic effect on cells; commonly used in chemotherapy to inhibit the proliferation of cancerous cells
a drug that decreases pulmonary congestion
a medication (in the form of an oil or salve etc.) that soothes inflamed or injured skin
designer drug
a psychoactive drug deliberately synthesized to avoid anti-drug laws; mimics the effects of a banned drug; law was revised in 1986 to ban designer drugs
used to produce perspiration
Antabuse, disulfiram
a drug (trade name Antabuse) used in the treatment of alcoholism; causes nausea and vomiting if alcohol is ingested
dosage, dose
a measured portion of medicine taken at any one time
the trade name for a drug used to treat upper respiratory congestion; it contains an antihistamine and a bronchodilator and a vasoconstrictor
psychoactive substance present in marijuana; used therapeutically to control nausea associated with cancer therapy
HAART, drug cocktail, highly active antiretroviral therapy
a combination of protease inhibitors taken with reverse transcriptase inhibitors; used in treating AIDS and HIV
estrogen antagonist, tamoxifen
an antagonist for estrogen that is used in the treatment of breast cancer
Enbrel, etanercept
a genetically engineered anti-TNF compound (trade name Enbrel) consisting of receptors that bind TNF; it is injected twice a week in the treatment of rheumatoid arthritis
Edecrin, ethacrynic acid
diuretic (trade name Edecrin) used to treat edema
a psychoactive drug that tends to produce elation and euphoria
expectorant, expectorator
a medicine promoting expectoration
fixed-combination drug
drug containing fixed amounts of two or more ingredients
Lasix, furosemide
commonly used diuretic (trade name Lasix) used to treat hypertension and edema
gateway drug
a habit-forming drug that is not addictive but its use may lead to the use of other addictive drugs
Lopid, gemfibrozil
medication (trade name Lopid) used to lower the levels of triglyceride in the blood
general anaesthetic, general anesthetic
an anesthetic that anesthetizes the entire body and causes loss of consciousness
hallucinogen, hallucinogenic drug, psychedelic drug, psychodelic drug
a psychoactive drug that induces hallucinations or altered sensory experiences
hard drug
a narcotic that is considered relatively strong and likely to cause addiction
haematinic, hematinic
a medicine that increases the hemoglobin content of the blood; used to treat iron-deficiency anemia
herbal medicine
a medicine made from plants and used to prevent or treat disease or promote health
histamine blocker
a medicine used to treat the gastric effects of histamine in cases of peptic ulcers and gastritis and gastroesophageal reflux; works by blocking the effects of histamine on the receptor site known as H2
immune suppressant drug, immunosuppressant, immunosuppressive, immunosuppressive drug, immunosuppressor
a drug that lowers the body's normal immune response
Lozal, indapamide
diuretic (trade name Lozal) used in the treatment of hypertension
Remicade, infliximab
an anti-TNF compound (trade name Remicade) consisting of an antibody directed against TNF; it is given intravenously at one-month to three-month intervals; used in treatment of regional enteritis and rheumatoid arthritis
inhalant, inhalation
a medication to be taken by inhaling it
intravenous anesthetic
an anesthetic that produces anesthesia when injected into the circulatory system
Isuprel, isoproterenol
drug (trade name Isuprel) used to treat bronchial asthma and to stimulate the heart
Isordil, isosorbide
drug (trade name Isordil) used to treat angina pectoris and congestive heart failure
African tea, Arabian tea, cat, kat, khat, qat, quat
the leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric stimulant
Arava, leflunomide
an anti-TNF compound (trade name Arava) that is given orally; can slow the progression of rheumatoid arthritis by slowing the proliferation of white blood cells which reduces inflammation in the synovium
lipid-lowering medication, lipid-lowering medicine, statin, statin drug
a medicine that lowers blood cholesterol levels by inhibiting HMG-CoA reductase
local, local anaesthetic, local anesthetic, topical anaesthetic, topical anesthetic
anesthetic that numbs a particular area of the body
Osmitrol, mannitol
a diuretic (trade name Osmitrol) used to promote the excretion of urine
Demerol, meperidine, meperidine hydrochloride
a synthetic narcotic drug (trade name Demerol) used to treat pain
Mecholyl, methacholine
parasympathomimetic drug (trademark Mecholyl) that stimulates secretions and smooth muscle activity
dolophine hydrochloride, fixer, methadon, methadone, methadone hydrochloride, synthetic heroin
synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction
Ritalin, methylphenidate
central nervous system stimulant (trade name Ritalin) used in the treatment of narcolepsy in adults and attention deficit disorder in children
muscle relaxant
a drug that reduces muscle contractility by blocking the transmission of nerve impulses or by decreasing the excitability of the motor end plate or by other actions
a soporific drug that produces an uncontrollable desire to sleep
narcotic antagonist
an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration)
nux vomica
a medicine made from the seeds of an Asiatic tree; contains strychnine and brucine; formerly used as a stimulant
a narcotic drug that contains opium or an opium derivative
an addictive narcotic extracted from seed capsules of the opium poppy
over-the-counter drug, over-the-counter medicine
a drug that is sold without a prescription
oxytocic, oxytocic drug
a drug that induces labor by stimulating contractions of the muscles of the uterus
camphorated tincture of opium, paregoric
medicine used to treat diarrhea
patent medicine
medicine that is protected by a patent and available without a doctor's prescription
Cuprimine, penicillamine
a drug (trade name Cuprimine) used to treat heavy metal poisoning and Wilson's disease and severe arthritis
Metrazol, pentamethylenetetrazol, pentylenetetrazol
a drug used as a circulatory and respiratory stimulant; larger doses cause convulsions in shock therapy; Metrazol is a trademark
pharmaceutic, pharmaceutical
drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment
Vasomax, phentolamine
a virility drug (trade name Vasomax) to treat erectile dysfunction in men
an innocuous or inert medication; given as a pacifier or to the control group in experiments on the efficacy of a drug
a container of stimulant drug (amyl nitrate or butyl nitrite)
any of various cosmetic or medical preparations dispensed in the form of a pulverized powder
ethical drug, prescription, prescription drug, prescription medicine
a drug that is available only with written instructions from a doctor or dentist to a pharmacist
a uricosuric drug that reduces the level of uric acid in the blood; used to treat gout
aperient, cathartic, physic, purgative
a purging medicine; stimulates evacuation of the bowels
recreational drug
a narcotic drug that is used only occasionally and is claimed to be nonaddictive
curative, cure, remedy, therapeutic
a medicine or therapy that cures disease or relieve pain
a medicine for external application that produces redness of the skin
depressant, downer, sedative, sedative drug
a drug that reduces excitability and calms a person
Viagra, sildenafil, sildenafil citrate
virility drug (trade name Viagra) used to treat erectile dysfunction in men
sleeping capsule, sleeping draught, sleeping pill, sleeping tablet
a soporific drug in the form of a pill (or tablet or capsule)
soft drug
a drug of abuse that is considered relatively mild and not likely to cause addiction
soothing syrup
medicine in the form of a syrup that has a calming effect
a medicine that has a mitigating effect on a specific disease
spinal anaesthetic, spinal anesthetic
an anesthetic that is injected into the spine
Carafate, sucralfate
medicine consisting of a tablet (trade name Carafate) used to treat peptic ulcers; said to bind to the ulcer site and coat it
sudatory, sudorific
a medicine that causes or increases sweating
a small plug of medication designed for insertion into the rectum or vagina where it melts
Cialis, tadalafil
virility drug (trade name Cialis) used to treat erectile dysfunction in men
THC, tetrahydrocannabinol
psychoactive substance present in marijuana
any of a group of drugs commonly used as diuretics in the treatment of hypertension; they block the reabsorption of sodium in the kidneys
(pharmacology) a medicine consisting of an extract in an alcohol solution
baccy, tobacco
leaves of the tobacco plant dried and prepared for smoking or ingestion
restorative, tonic
a medicine that strengthens and invigorates
antianxiety agent, ataractic, ataractic agent, ataractic drug, tranquilizer, tranquilliser, tranquillizer
a drug used to reduce stress or tension without reducing mental clarity
tyrosine kinase inhibitor
a drug used in cases of chronic myeloid leukemia
Levitra, vardenafil
virility drug (trade name Levitra) used to treat erectile dysfunction in men
vasodilative, vasodilator
a drug that causes dilation of blood vessels
an agent that kills worms (especially those in the intestines)
anthelminthic, anthelmintic, helminthic, vermifuge
a medication capable of causing the evacuation of parasitic intestinal worms
alcohol, alcoholic beverage, alcoholic drink, inebriant, intoxicant
a liquor or brew containing alcohol as the active agent
Type of:
a substance that exerts some force or effect

v administer a drug to

“They drugged the kidnapped tourist”
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anaesthetise, anaesthetize, anesthetise, anesthetize, put out, put under
administer an anesthetic drug to
dope, dope up
give a narcotic to
o.d., overdose
dose too heavily
narcotise, narcotize
administer narcotics to
administer poison to
etherise, etherize
anesthetize with ether
cocainise, cocainize
anesthetize with cocaine
anesthetize with chloroform
anesthetize by cold
dope (a racehorse)
have an intoxicating effect on, of a drug
interrupt the normal function of by means of anesthesia
Type of:
medicate, medicine
treat medicinally, treat with medicine

v use recreational drugs

do drugs
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take by injection
snort, take a hit
inhale through the nose
base, free-base
use (purified cocaine) by burning it and inhaling the fumes
take (a drug, especially LSD), by mouth
take drugs to improve one's athletic performance
inject into the vein
take drugs, especially orally
Type of:
consume, have, ingest, take, take in
serve oneself to, or consume regularly

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