- Abacavir(Antiviral.)
- Abamectin
- Abarelix(Antineoplastic (hormonal).)
- Abatacept(Immunosuppressant; antipsoriatic.)
- Abciximab(Antithrombotic.)
- Abecarnil(Anxiolytic.)
- Abetimus Sodium(Immunosuppressant in treatment of SLE and associated nephritis.)
- Abietic Acid
- Abikoviromycin
- Abrin
- Abrine
- Abscisic Acid
- Absinthin
- Acacetin
- Acacia
- Acacic Acid
- Acadesine(Cardioprotective.)
- Acamprosate Calcium(In treatment of alcoholism.)
- Acarbose(Antidiabetic.)
- Acebutolol(Antihypertensive; antianginal; antiarrhythmic (class II).)
- Acecainide(Antiarrhythmic.)
- Acecarbromal(Sedative, hypnotic.)
- Aceclofenac(Anti-inflammatory; analgesic.)
- Acedapsone(Antibacterial (leprostatic).)
- Acediasulfone(Antibacterial.)
- Acefylline(Bronchodilator.)
- Aceglatone(Antineoplastic.)
- Aceglutamide(Free acid as nootropic; aluminum complex as antiulcerative.)
- Acemannan(Antiviral; immunomodulator.)
- Acemetacin(Anti-inflammatory.)
- Acenaphthene
- Acenocoumarol(Anticoagulant.)
- Aceperone
- Acephate
- Acepromazine
- Acequinocyl
- Acerin
- Acerola(Nutrient.)
- ACES
- Acesulfame
- Acetal
- Acetaldehyde
- Acetaldehyde Ammonia
- Acetaldehyde Sodium Bisulfite
- Acetaldoxime
- Acetamide
- Acetamidine Hydrochloride
- Acetamidoeugenol(Anesthetic (intravenous).)
- Acetaminophen(Analgesic; antipyretic.)
- Acetaminosalol(Analgesic; antipyretic; anti-inflammatory.)
- Acetamiprid
- Acetanilide
- Acetarsone(Antiprotozoal (Trichomonas).)
- Acetazolamide(Antiglaucoma; diuretic; in treatment of acute mountain sickness.)
- Acetiamine(Vitamin (enzyme cofactor).)
- Acetic Acid Glacial
- Acetic Anhydride
- Acetimidoquinone
- Acetoacetanilide
- Acetoacetic Acid
- Acetobromglucose
- Acetochlor
- Acetohexamide(Antidiabetic.)
- Acetohydroxamic Acid(Antiurolithic. Antibacterial adjunct (urinary tract infection).)
- Acetoin
- Acetol
- Acetomeroctol(Antiseptic.)
- Acetone
- Acetone Cyanohydrin
- Acetone Sodium Bisulfite
- Acetonedicarboxylic Acid
- Acetonitrile
- Acetonylacetone
- Acetophenazine(Antipsychotic.)
- Acetophenone
- Acetosulfone Sodium(Antibacterial (leprostatic).)
- Acetotoluide
- Acetoxime
- Acetoxolone(Antiulcerative.)
- Acetozone
- Acetrizoate Sodium(Diagnostic aid (radiopaque medium).)
- Aceturic Acid
- Acetyl Bromide
- Acetyl Chloride
- Acetyl Iodide
- Acetyl Nitrate
- Acetyl Sulfamethoxypyrazine(Antibacterial.)
- Acetylacetone
- Acetylcarnitine(Nootropic.)
- Acetylcholine Bromide(Cholinergic.)
- Acetylcholine Chloride(Cholinergic.)
- Acetylcysteine(Mucolytic; corneal vulnerary; antidote (acetaminophen poisoning).)
- Acetyldigitoxins(Cardiotonic.)
- Acetylene
- Acetylene Dibromide
- Acetylene Dichloride
- Acetyleneurea
- Acetylleucine Monoethanolamine(Antivertigo agent.)
- Acetylpheneturide(Anticonvulsant.)
- Acetylsalicylsalicylic Acid(Analgesic.)
- Acetyltannic Acid(Astringent (intestinal).)
- Achillea(Carminative; cholagogue; antiseptic.)
- Acibenzolar-S-methyl
- Acid α-Glucosidase(Enzyme replacement therapy for Pompe's disease.)
- Acid Fuchsin
- Acid Violet 7B
- Acifluorfen
- Acifran(Antilipemic.)
- Acipimox(Antilipemic.)
- Acitretin(Antipsoriatic.)
- Aclacinomycins(Antineoplastic.)
- Aclatonium Napadisilate(Cholinergic.)
- Aconine
- Aconite(Antipyretic.)
- Aconitic Acid
- Aconitine(Has been used topically in neuralgia.)
- Aconitine, Amorphous
- Aconitum Ferox
- Acranil®(Antiprotozoal (Giardia).)
- Acridine
- Acriflavine(Anti-infective.)
- Acrilan®
- Acrinathrin
- Acrisorcin(Antifungal.)
- Acrivastine(Antihistaminic.)
- Acrolein
- Acrylamide
- Acrylic Acid
- Acrylonitrile
- Actaplanins
- Actarit(Antiarthritic.)
- ACTH(Adrenocorticotropic hormone.)
- Actimid(Immunomodulator.)
- Actin
- Actinium
- Actinobolin
- Actinodaphnine
- Actinomycetin
- Actinomycin F1
- Actinoquinol(Sodium salt as ultraviolet screen.)
- Actinorhodine
- Actiphenol
- Activin
- ACV
- Acyclovir(Antiviral.)
- ADA
- Adalimumab(Anti-inflammatory.)
- Adamantane
- Adapalene(Antiacne.)
- Adefovir(Antiviral.)
- Adenine
- A-Denopterin
- Adenosine(Antiarrhythmic.)
- Adenosine Diphosphate
- Adenosine Triphosphate(Coenzyme.)
- Adhatoda(Expectorant.)
- Adinazolam(Antidepressant.)
- Adiphenine(Antispasmodic.)
- Adipic Acid
- Adiponectin
- Adipsin
- Adlumidine
- Adlumine
- Adonis vernalis(Cardiotonic.)
- Adonitol
- Adonitoxin
- Adrafinil(Treatment of depression.)
- Adrenal Cortical Extract(Corticosteroid.)
- Adrenalone(Hemostatic.)
- Adrenochrome(Monosemicarbazone as hemostatic.)
- Adrenoglomerulotropin
- Adrenolutin
- Adrenomedullin
- Adrenosterone
- Aequorin
- AET(Radioprotective agent.)
- Affinin
- Aflatoxins B
- Aflatoxins G
- Aflatoxins M
- Afloqualone(Muscle relaxant (skeletal).)
- Agar(Cathartic.)
- Agaric
- Agaricic Acid
- Agaritine
- Agmatine
- Agnus Castus(In treatment of premenstrual syndrome.)
- Agomelatine(Antidepressant.)
- Agroclavine
- Agrocybin
- Ahistan(Antihistaminic.)
- Ajaconine
- Ajmaline(Antihypertensive; antiarrhythmic.)
- Ajoene
- Ajowan Oil
- Ajugarins
- Ajulemic Acid(Anti-inflammatory.)
- Aklomide
- Akuammicine
- Akuammine
- AL 721
- Alacepril(Antihypertensive.)
- Alachlor
- Alafosfalin
- Alagebrium Chloride(In treatment of cardiovascular complications of diabetes and aging.)
- Alanine
- Alantolactone
- Alazopeptin
- Albaspidin
- Albendazole(Anthelmintic (Cestodes).)
- Albizziin
- Albofungin
- Albomycin
- Alborixin
- Albumen(Antidote to mercury poisoning.)
- Albuterol(Bronchodilator; tocolytic.)
- Albutoin(Anticonvulsant.)
- Alcian Blue
- Alclofenac(Analgesic; antipyretic; anti-inflammatory.)
- Alclometasone(Anti-inflammatory (topical).)
- Alcuronium(Neuromuscular blocking agent.)
- Aldicarb
- Aldioxa(Antiulcerative.)
- Aldol
- Aldosterone(Mineralocorticoid.)
- Aldrin
- Alefacept(Antipsoriatic; immunosuppressant.)
- Alemtuzumab(Antineoplastic; immunosuppressant.)
- Alendronic Acid(Bone resorption inhibitor.)
- Aletris(Antiflatulent.)
- Aleuritic Acid
- Alexidine(Antibacterial.)
- Alexitol Sodium(Antacid.)
- Alfadolone Acetate(Combination with alfaxalone as anesthetic (intravenous).)
- Alfaprostol
- Alfaxalone(Combination with alfadolone acetate as anesthetic (intravenous).)
- Alfentanil(Analgesic (narcotic).)
- Alfimeprase(Thrombolytic.)
- Alfuzosin(Antihypertensive. In treatment of benign prostatic hypertrophy.)
- Algestone(Acetonide as anti-inflammatory (topical).)
- Algestone Acetophenide(Antiacne.)
- Algin(Hemostatic.)
- Alginic Acid(Calcium salt as hemostatic.)
- Alglucerase(Enzyme replacement therapy for Gaucher's disease.)
- Alibendol(Choleretic; antispasmodic.)
- Alicaforsen(Anti-inflammatory.)
- Alinidine
- Aliskiren(Antihypertensive.)
- Alitame
- Alitretinoin(Antineoplastic.)
- Alizapride(Antiemetic.)
- Alizarin
- Alizarin Cyanine Green F
- Alizarine Blue
- Alizarine Orange
- Alizarine Yellow R
- Alkanet(Astringent.)
- Alkannin(Astringent.)
- Alkofanone(Antidiarrheal.)
- Allantoin(Vulnerary.)
- Allenolic Acid
- Allethrins
- Allicin
- Allidochlor
- Alliin
- Allobarbital(Sedative, hypnotic.)
- Allocholesterol
- Alloclamide(Antitussive, antihistaminic.)
- Allocryptopine
- Allocupreide Sodium(Antirheumatic.)
- Allopregnan-20α-ol-3-one
- Allopregnan-20β-ol-3-one
- Allopregnan-3α-ol-20-one
- Allopregnan-3β-ol-20-one
- Allopregnane
- Allopregnane-3α,11β,17α,21-tetrol-20-one
- Allopregnane-3α,20α-diol
- Allopregnane-3α,20β-diol
- Allopregnane-3β,11β,17α,20β,21-pentol
- Allopregnane-3β,11β,17α,21-tetrol-20-one
- Allopregnane-3β,11β,21-triol-20-one
- Allopregnane-3β,17α,20α-triol
- Allopregnane-3β,17α,20β,21-tetrol
- Allopregnane-3β,17α,20β-triol
- Allopregnane-3β,17α,21-triol-11,20-dione
- Allopregnane-3β,17α,21-triol-20-one
- Allopregnane-3β,17α-diol-20-one
- Allopregnane-3β,20α-diol
- Allopregnane-3β,20β-diol
- Allopregnane-3β,21-diol-11,20-dione
- Allopurinol(Treatment of hyperuricemia and chronic gout. Antiurolithic.)
- Allotetrahydrocortisone
- Alloxan
- Alloxantin
- allo-Yohimbine
- Allura Red AC
- Allyl acetate
- Allyl Alcohol
- Allyl Bromide
- Allyl Chloride
- Allyl Cyanide
- Allyl Ether
- Allyl Ethyl Ether
- Allyl Iodide
- Allyl Isothiocyanate(Counterirritant.)
- Allyl Sulfide
- Allylamine
- Allylestrenol(Progestogen.)
- Allylprodine
- Allylurea
- Almagate(Antacid.)
- Alminoprofen(Anti-inflammatory; analgesic.)
- Almitrine(Respiratory stimulant.)
- Almond, Bitter
- Almond, Sweet
- Almotriptan(Antimigraine.)
- Aloe(Latex as laxative; gel as emollient, vulnerary.)
- Aloe-Emodin(Cathartic.)
- Aloin(Cathartic.)
- Alosetron(In treatment of irritable bowel syndrome.)
- Aloxidone(Anticonvulsant.)
- Aloxiprin(Analgesic.)
- α-(α-Aminopropyl)benzyl Alcohol
- α,α,β-Trichloro-n-butyraldehyde
- α,α'-Dibromo-d-camphor
- α,α'-Dipyridyl
- α1-Antitrypsin(In treatment of emphysema associated with inherited alpha1-antitrypsin deficiency.)
- α1-Sitosterol
- α-Acetylbutyrolactone
- α-Aminoadipic Acid
- α-Aminobutyric Acid
- α-Aminoisobutyric Acid
- α-Aminopyridine
- α-Amyrin
- α-Antiarin
- α-Bisabolol(Anti-inflammatory.)
- α-Bromobenzyl Cyanide
- α-Bromobutyric Acid
- α-Bromoisobutyric Acid
- α-Bromoisovaleric Acid
- α-Bromo-n-caproic Acid
- α-Butylene Dibromide
- α-Carotene(Vitamin A precursor.)
- α-Chloralose(Sedative, hypnotic.)
- α-Chlorohydrin
- α-Ergostenol
- α-Erythroidine
- α-Estradiol
- α-Ethylbenzyl Alcohol(Choleretic.)
- α-Farnesene
- α-Furildioxime
- α-Galactosidase A(Enzyme replacement therapy for Fabry's disease.)
- α-Glucogallin
- α-Glucose-1-phosphate(Calcium salt as roborant.)
- α-Hederin
- α-Hydroxybenzylphosphinic Acid(Sodium salt as nutrient.)
- α-Irone
- α-Ketoglutaric Acid
- α-Latrotoxin
- α-L-Iduronidase(Enzyme replacement therapy in mucopolysaccharidosis-I.)
- α-Methylbenzylamine
- α-Methylene Butyrolactone
- α-Methylfentanyl
- α-Methylglucoside
- α-Methyl-m-tyrosine
- α-Methyltryptamine
- αMNP
- α-Naphtholphthalein
- α-Peltatin
- α-Phellandrene
- α-Phenylacetamide
- α-Phenylbutyramide(In hypercholesterolemia.)
- α-Phenylcinnamic Acid
- α-Phenylglycine
- α-Picoline
- α-Pinene
- Alphaprodine(Analgesic (narcotic).)
- α-Ribazole
- α-Santalol
- α-Santonin(Anthelmintic (Nematodes).)
- α-Spinasterol
- α-Terpineol(Antiseptic.)
- α-Terthienyl
- α-Tocopherol(Vitamin E supplement.)
- α-Tocotrienol
- α-Yohimbine
- Alpidem(Anxiolytic.)
- Alpiropride(Antimigraine.)
- Alprazolam(Anxiolytic.)
- Alprenolol(Antihypertensive; antianginal; antiarrhythmic.)
- Alsactide(Diagnostic aid (adrenal function).)
- Alstonidine
- Alstonine
- Althea
- Althiazide(Diuretic; antihypertensive.)
- Altrenogest
- Altretamine(Antineoplastic.)
- Aluminon(Pharyngeal aerosol spray.)
- Aluminum
- Aluminum Acetate Solution(Astringent, antiseptic.)
- Aluminum Acetotartrate(Astringent, antiseptic.)
- Aluminum Alkyls
- Aluminum Ammonium Sulfate(Astringent, styptic.)
- Aluminum Antimonide
- Aluminum Benzoate
- Aluminum β-Naphtholdisulfonate
- Aluminum Bis(acetylsalicylate)(Analgesic, antipyretic.)
- Aluminum Borate
- Aluminum Boroformate
- Aluminum Borohydride
- Aluminum Bromide
- Aluminum Calcium Hydride
- Aluminum Carbide
- Aluminum Cesium Sulfate
- Aluminum Chlorate(Antiseptic, astringent.)
- Aluminum Chloride(The hexahydrate as anhidrotic.)
- Aluminum Ethoxide
- Aluminum Fluoride
- Aluminum Hexafluorosilicate
- Aluminum Hexaurea Sulfate Triiodide
- Aluminum Hydride
- Aluminum Hydroxide(Antacid; antihyperphosphatemic.)
- Aluminum Hydroxychloride(Astringent; antihyperphosphatemic.)
- Aluminum Hydroxydiacetate
- Aluminum Hypophosphite
- Aluminum Iodide
- Aluminum Isopropoxide
- Aluminum Lactate(Antiseptic.)
- Aluminum Lithium Hydride
- Aluminum Magnesium Silicate(Antacid.)
- Aluminum Nicotinate(Has been used as antilipemic.)
- Aluminum Nitrate
- Aluminum Nitride
- Aluminum Oleate
- Aluminum Oxalate
- Aluminum Oxide
- Aluminum Palmitate
- Aluminum Phosphate(Antacid.)
- Aluminum Phosphide
- Aluminum Potassium Sulfate(Astringent.)
- Aluminum Rubidium Sulfate
- Aluminum Salicylates, Basic(Antidiarrheal.)
- Aluminum Selenide
- Aluminum Silicate
- Aluminum Sodium Sulfate(Astringent.)
- Aluminum Stearate
- Aluminum Subacetate Solution(Astringent, antiseptic.)
- Aluminum Sulfate(Anti-infective.)
- Aluminum Sulfide
- Aluminum Tartrate
- Aluminum tert-Butoxide
- Aluminum Thiocyanate
- Aluminum Tris(8-hydroxyquinoline)
- Aluminum Zinc Sulfate
- Alverine(Antispasmodic.)
- Alvimopan(Gastroprokinetic.)
- Amanitin
- Amanozine(Diuretic.)
- Amantadine(Antiviral; antiparkinsonian.)
- Amantanium Bromide(Antiseptic.)
- Amaranth (Dye)
- Amaranth (Plant)
- Amarogentin
- Amarolide
- Ambazone(Antibacterial.)
- Ambenonium Chloride(Cholinesterase inhibitor.)
- Amber
- Ambergris
- Amberlite®
- Amberlyst 15®
- Ambrisentan(Antihypertensive.)
- Ambrosin
- Ambroxol(Expectorant.)
- Ambucaine(Anesthetic (local).)
- Ambucetamide
- Ambuphylline(Bronchodilator.)
- Ambuside(Diuretic; antihypertensive.)
- Ambutonium Bromide(Antispasmodic.)
- Amcinonide(Glucocorticoid.)
- Amdinocillin(Antibacterial.)
- Amdinocillin Pivoxil(Antibacterial.)
- Amediplase(Thrombolytic.)
- Americium(241Am as diagnostic aid (bone mineral analyzer); as antineoplastic (radiation source).)
- Ametryn
- Amezinium Methyl Sulfate(Antihypotensive.)
- Amfenac(Anti-inflammatory.)
- Amicarbalide
- Amicarbazone
- Amicetin
- Amicibone(Antitussive.)
- Amicoumacin A
- Amidephrine(Vasoconstrictor; decongestant (nasal).)
- Amidinomycin(Antiviral.)
- Amidochlor
- Amido-G-Acid
- Amidomycin
- Amido-R-Acid
- Amidosulfuron
- Amifostine(Radioprotective agent.)
- Amikacin(Antibacterial.)
- Amiloride(Diuretic.)
- Aminacrine(Antiseptic.)
- Amine 220
- Amineptine(Antidepressant.)
- Aminitrozole(Antiprotozoal (Trichomonas).)
- Aminoacetonitrile
- Aminoacetophenone
- Aminocarb
- Aminochlorthenoxazin(Antipyretic; analgesic.)
- Aminochromes(Hemostatic.)
- Aminoglutethimide(Adrenocortical suppressant; antineoplastic.)
- Aminoguanidine(In prevention and treatment of chronic diabetic complications.)
- Aminometradine(Diuretic.)
- Aminopentamide(Antispasmodic.)
- Aminophylline(Bronchodilator.)
- Aminopromazine(Antispasmodic.)
- Aminopropylon(Analgesic.)
- Aminopterin
- Aminopyrine(Antipyretic; analgesic. Diagnostic aid (hepatic function).)
- Aminoquinuride(Antiseptic.)
- Aminorex(Anorexic.)
- Amioca
- Amiodarone(Antiarrhythmic (class III).)
- Amiphenazole(Narcotic antagonist.)
- Amiprilose(Immunomodulator; anti-inflammatory.)
- Amisometradine(Diuretic.)
- Amisulpride(Antipsychotic.)
- Amiton
- Amitraz
- Amitriptyline(Antidepressant.)
- Amitriptylinoxide(Antidepressant.)
- Amitrole
- Amixetrine(Antispasmodic.)
- Amlexanox(Antiallergic; antiasthmatic.)
- Amlodipine(Antianginal; antihypertensive.)
- Ammonia
- Ammonia Water(10% Solution as reflex respiratory stimulant.)
- Ammoniacum(Diaphoretic; emmenagogue.)
- Ammonium Acetate(Diuretic.)
- Ammonium Benzoate(Urinary anti-infective.)
- Ammonium Bicarbonate(Expectorant.)
- Ammonium Bifluoride
- Ammonium Bimalate
- Ammonium Binoxalate
- Ammonium Bisulfate
- Ammonium Bisulfide
- Ammonium Bisulfite
- Ammonium Bitartrate
- Ammonium Borate
- Ammonium Bromide(Sedative.)
- Ammonium Caprylate
- Ammonium Carbamate
- Ammonium Carbonate(Expectorant.)
- Ammonium Cerous Sulfate
- Ammonium Chloride(Acidifier.)
- Ammonium Chromate(VI)
- Ammonium Chromic Sulfate
- Ammonium Citrate, Dibasic
- Ammonium Cobaltous Phosphate
- Ammonium Cobaltous Sulfate
- Ammonium Cupric Chloride
- Ammonium Dichromate(VI)
- Ammonium Dithiocarbamate
- Ammonium Ferric Chromate
- Ammonium Ferric Oxalate
- Ammonium Ferric Sulfate(Astringent, styptic.)
- Ammonium Ferricyanide
- Ammonium Ferrocyanide
- Ammonium Ferrous Sulfate
- Ammonium Fluoride
- Ammonium Formate
- Ammonium Hexafluoroaluminate
- Ammonium Hexafluorogallate
- Ammonium Hexafluorophosphate
- Ammonium Hexafluorosilicate
- Ammonium Hypophosphite
- Ammonium Iodide
- Ammonium Lactate
- Ammonium Magnesium Chloride
- Ammonium Mandelate(Anti-infective (urinary).)
- Ammonium Molybdate(VI)
- Ammonium Nitrate
- Ammonium Nitroferricyanide
- Ammonium Oleate
- Ammonium Osmium Chloride
- Ammonium Oxalate
- Ammonium Palmitate
- Ammonium Pentachlorozincate
- Ammonium Perchlorate
- Ammonium Peroxydisulfate
- Ammonium Phosphate, Dibasic
- Ammonium Phosphate, Monobasic
- Ammonium Phosphite
- Ammonium Phosphomolybdate
- Ammonium Phosphotungstate
- Ammonium Picrate
- Ammonium Platinic Chloride
- Ammonium Platinous Chloride
- Ammonium Salicylate(Analgesic; topically to loosen psoriatic scales.)
- Ammonium Selenate
- Ammonium Selenite
- Ammonium Sodium Phosphate
- Ammonium Stearate
- Ammonium Sulfamate
- Ammonium Sulfate
- Ammonium Sulfide
- Ammonium Sulfide Solution, Red
- Ammonium Sulfide Solution, Yellow
- Ammonium Sulfite
- Ammonium Tetrachloroaluminate
- Ammonium Tetrachlorozincate
- Ammonium Tetrathiomolybdate(Chelating agent (copper); Wilson's Disease treatment.)
- Ammonium Thiocyanate
- Ammonium Thiosulfate
- Ammonium Titanium Oxalate
- Ammonium Tungstate(VI)
- Ammonium Uranate(VI)
- Ammonium Uranium Carbonate
- Ammonium Uranium Fluoride
- Ammonium Valerate(Formerly as sedative.)
- Ammonium Vanadate(V)
- Ammonium Zirconyl Carbonate
- Amobarbital(Sedative, hypnotic.)
- Amocarzine(Anthelmintic (Nematodes).)
- Amodiaquin(Antimalarial.)
- Amolanone(Anesthetic (local).)
- Amoproxan(Antiarrhythmic.)
- Amorolfine(Antifungal (topical).)
- Amoscanate(Anthelmintic (Schistosoma).)
- Amosulalol(Antihypertensive.)
- Amotriphene(Vasodilator (coronary).)
- Amoxapine(Antidepressant.)
- Amoxicillin(Antibacterial.)
- AMPA
- Ampelopsin
- Amperozide
- Amphecloral(Anorexic.)
- Amphenidone(Sedative; hypnotic.)
- Amphenone B
- Amphetamine(CNS stimulant; anorexic.)
- Amphetaminil(Psychotropic.)
- Amphomycin(Antibacterial.)
- Amphotalide(Anthelmintic (Schistosoma).)
- Amphotericin B(Antifungal.)
- Ampicillin(Antibacterial.)
- Ampiroxicam(Anti-inflammatory.)
- Ampligen(Antiviral; immunomodulator.)
- Amprenavir(Antiviral.)
- Amprolium
- Amprotropine Phosphate(Antispasmodic.)
- Ampyrone
- Amrinone(Cardiotonic.)
- Amrubicin(Antineoplastic.)
- Amsacrine(Antineoplastic.)
- Amsonic Acid
- Amtolmetin Guacil(Analgesic; anti-inflammatory.)
- Amygdalin
- Amyl Chloride
- Amyl Nitrite
- Amylase(Enzyme (digestive aid).)
- Amylbenzene
- Amylene
- Amylene Dichloride
- Amylin(In treatment of insulin-dependent diabetes.)
- Amylocaine Hydrochloride(Anesthetic (local).)
- Amyloid β Peptide
- Amylpenicillin
- Anabasine
- Anabsinthin
- Anacardic Acid
- Anagestone(Progestogen.)
- Anagrelide(Antithrombocythemic.)
- Anagyrine
- Anandamide
- Anastrozole(Antineoplastic.)
- Anatabine
- Anatoxins
- Anazolene Sodium(Diagnostic aid (cardiac output, blood volume determination).)
- Ancitabine(Antineoplastic.)
- Ancrod(Anticoagulant.)
- Ancymidol
- Andrographis(In treatment of upper respiratory infections; hepatoprotectant.)
- Andrographolide
- Androisoxazole(Anabolic.)
- Androstane
- Androstane-3β,11β-diol-17-one
- Androstenediol
- Androstenedione
- Androsterone
- Anecortave Acetate(In treatment of macular degeneration.)
- Anemonin
- Anethole(Antitussive.)
- Anethole Trithione(Choleretic; sialogogue.)
- Angelic Acid
- Angelica(Carminative, diaphoretic, diuretic.)
- Angelica Lactone
- Angeli's Salt
- Angiogenin
- Angiostatin
- Angiotensin(Amide as vasoconstrictor.)
- Angostura Bark(Antipyretic.)
- Anhalamine
- Anhalonidine
- Anhalonine
- Anidulafungin(Antifungal.)
- Anilazine
- Anileridine(Analgesic (narcotic).)
- Aniline
- Aniline Mustard
- Anilinephthalein
- Aniracetam(Nootropic.)
- Anise(Carminative; expectorant.)
- Anise Alcohol
- Anisidine
- Anisindione(Anticoagulant.)
- Anisole
- Anisomycin
- Anisotropine Methylbromide(Antispasmodic.)
- Anistreplase(Thrombolytic.)
- Annatto
- Annexins
- Annotinine
- Anot
- Anserine
- Antazoline(Antihistaminic.)
- Antheridiol
- Anthiolimine(Anthelmintic (Trematodes).)
- Anthracene
- Anthragallol
- Anthralin(Antipsoriatic.)
- Anthramycin
- Anthranol
- Anthraquinone
- Anthrarobin(Parasiticide.)
- Anthrarufin
- Anthrimide
- Anthrone
- Antimony
- Antimony Chloride Oxide
- Antimony Dichlorotrifluoride
- Antimony Pentachloride
- Antimony Pentafluoride
- Antimony Pentasulfide
- Antimony Pentoxide
- Antimony Potassium Oxalate
- Antimony Potassium Tartrate(Anthelmintic (Schistosoma).)
- Antimony Sodium Gluconate(Trivalent compd as an anthelmintic (Schistosoma); pentavalent compd as an antiprotozoal (Leishmania).)
- Antimony Sodium Tartrate(Anthelmintic (Schistosoma).)
- Antimony Sodium Thioglycollate(Anthelmintic (Schistosoma).)
- Antimony Sulfate
- Antimony Thioglycollamide(Anthelmintic (Schistosoma).)
- Antimony Tribromide
- Antimony Trichloride
- Antimony Trichloride Solution
- Antimony Trifluoride
- Antimony Triiodide
- Antimony Trioxide
- Antimony Triselenide
- Antimony Trisulfide
- Antimycin A1
- Antimycin A3
- Antipyrine(Analgesic.)
- Antipyrine Salicylate(Analgesic.)
- Antireticular Cytotoxic Serum
- Antivenin (Crotalidae) Polyvalent(Antidote to snake venom.)
- Antivenin (Latrodectus mactans)(In treatment of black widow spider bites.)
- Antivirin
- Antrafenine(Analgesic.)
- ANTU
- Apafant
- Apalcillin(Antibacterial.)
- Apamin
- Apazone(Anti-inflammatory; analgesic.)
- Aphidicolin
- Apholate
- Aphylline
- Apicycline(Antibacterial.)
- Apigenin
- Apigetrin
- Apiin
- Apiole (Dill)
- Apiole (Parsley)
- Apiose
- Aplasmomycin
- Aplaviroc(Antiviral.)
- Aplidine(Antineoplastic.)
- Apoatropine
- Apo-β-erythroidine
- Apocodeine(Emetic.)
- Apocynin
- Apocynum androsaemifolium(Cardiotonic.)
- Apocynum cannabinum(Cardiotonic.)
- Apolipoprotein E
- Apomorphine(Antiparkinsonian; emetic. In treatment of male erectile dysfunction.)
- Apoptolidin
- Aporeine
- Appel's Salt
- Appetize®
- Apraclonidine(Treatment of post-surgical elevated intraocular pressure.)
- Apramycin
- Aprepitant(Antiemetic.)
- Aprindine(Antiarrhythmic (class I).)
- Aprinocarsen(Antineoplastic.)
- Aprobarbital(Sedative, hypnotic.)
- Apronalide(Sedative, hypnotic.)
- Aprotinin(Protease inhibitor.)
- Aptiganel(Neuroprotective.)
- Apyrase
- Aquaporins
- Arabinose
- Arabitol
- Arachidic Acid
- Arachidonic Acid(Nutrient (essential fatty acid).)
- Aralia
- Aramite®
- Aranidipine(Antihypertensive.)
- Araroba(Dermatologic.)
- Arbaprostil
- Arbekacin(Antibacterial.)
- Arborescin
- Arbutamine(Stress agent for diagnosis of coronary artery disease.)
- Arbutin
- Arcitumomab(99mTc-labeled form as diagnostic aid (radioactive tumor targeting agent).)
- Ardeparin(Antithrombotic.)
- Areca(Anthelmintic.)
- Arecaidine
- Arecoline
- Argatroban(Antithrombotic.)
- Arginine(Ammonia detoxicant (hepatic failure); diagnostic aid (pituitary function).)
- Arginine Glutamate(Ammonia detoxicant (hepatic failure).)
- Argol
- Argon
- Aricine
- Aripiprazole(Antipsychotic.)
- Aristolochic Acid
- Armepavine
- Armstrong's Acid
- Arnica(Counterirritant (topical).)
- Arogenic Acid
- Arotinolol(Antihypertensive; antianginal; antiarrhythmic.)
- Arprinocid
- Arsacetin(Sodium salt formerly as antisyphilitic.)
- Arsanilic Acid
- Arsenamide
- Arsenic
- Arsenic Acid
- Arsenic Hemiselenide
- Arsenic Pentafluoride
- Arsenic Pentaselenide
- Arsenic Pentasulfide
- Arsenic Pentoxide
- Arsenic Sulfide
- Arsenic Tribromide
- Arsenic Trichloride
- Arsenic Trifluoride
- Arsenic Triiodide(Formerly in dermatitides.)
- Arsenic Trioxide(Antineoplastic.)
- Arsenic Triselenide
- Arsenic Trisulfide
- Arsenious Acid Solution
- Arsenoacetic Acid
- Arsine
- Arsonoacetic Acid
- Arsphenamine
- Arsthinol(Antiamebic.)
- Arteether(Antimalarial.)
- Arteflene(Antimalarial.)
- Artemether(Antimalarial.)
- Artemisin
- Artemisinin(Antimalarial.)
- Artesunate(Antimalarial.)
- ar-Turmerone
- Arylsulfatase B(Enzyme replacement therapy for mucopolysaccharidosis-VI.)
- Arzoxifene(Antineoplastic (hormonal).)
- Asafetida(Carminative; expectorant.)
- Asaprol
- Asarinin
- Asarones
- Asarum
- Asbestos
- Ascaridole(Has been used as anthelmintic (Nematodes).)
- Asclepias
- Asclepias syriaca
- Ascorbic Acid(Vitamin (antiscorbutic).)
- Ascorbigen
- Asenapine(Antipsychotic.)
- Asiaticoside
- Asoprisnil(In treatment of uterine fibroids.)
- Asoxime Chloride(Antidote (organophosphate poisoning).)
- Asparagine
- Asparagus
- Aspartame
- Aspartic Acid
- Aspergillic Acid
- Aspergillin
- Asperlicin
- Asperuloside
- Asphalt
- Aspidin(Anthelmintic (Cestodes).)
- Aspidinol(Anthelmintic (Cestodes).)
- Aspidium(Anthelmintic (Cestodes).)
- Aspidosperma(Respiratory stimulant.)
- Aspidospermine
- Aspirin(Analgesic; antipyretic; anti-inflammatory; antithrombotic.)
- Aspoxicillin(Antibacterial.)
- Astacin
- Astatine
- Astaxanthin
- Astemizole(Antihistaminic.)
- Asulam
- Atazanavir(Antiviral.)
- Atenolol(Antihypertensive, antianginal, antiarrhythmic (class II).)
- Atevirdine(Antiviral.)
- Athamantin
- Atipamezole
- Atisine
- Atmosphere
- Atomoxetine(In treatment of attention deficit hyperactivity disorder (ADHD).)
- Atorvastatin(Antilipemic.)
- Atosiban(Tocolytic.)
- Atovaquone(Antipneumocystic.)
- Atractyloside
- Atracurium Besylate(Neuromuscular blocking agent.)
- Atranorin
- Atrasentan(Antineoplastic.)
- Atrazine
- Atrial Natriuretic Peptide(In treatment of acute heart failure; antihypertensive.)
- Atrolactamide(Anticonvulsant.)
- Atrolactic Acid
- Atropic Acid
- Atropine(Mydriatic; antispasmodic. In preanesthetic medication.)
- Attacins
- Aucubin
- Auranofin(Antirheumatic.)
- Aurantiogliocladin
- Aureothin
- Aureothricin
- Aurin
- Aurodox
- Aurothioglucose(Antirheumatic.)
- Aurothioglycanide
- Avasimibe(Antilipemic.)
- Avermectins
- Avidin
- Avilamycin
- Avobenzone(Ultraviolet screen.)
- Avoparcin
- Azacitidine(Antineoplastic.)
- Azaconazole
- Azacosterol
- Azacyclonol(Anxiolytic.)
- Azadirachtin
- Azafenidin
- Azafrin
- Azamethonium Bromide(Antihypertensive.)
- Azanidazole(Antiprotozoal (Trichomonas).)
- Azaperone
- Azaserine
- Azasetron(Antiemetic.)
- Azatadine(Antihistaminic.)
- Azathioprine(Immunosuppressant; antirheumatic.)
- Azelaic Acid(Antiacne.)
- Azelastine(Antihistaminic.)
- Azelnidipine(Antihypertensive.)
- Azidamfenicol(Antibacterial.)
- Azidocillin(Antibacterial.)
- Azimilide(Antiarrhythmic (class III).)
- Azimsulfuron
- Azinphos-methyl
- Azintamide(Choleretic.)
- Azithromycin(Antibacterial.)
- Azlocillin(Antibacterial.)
- Azobenzene
- Azodicarbonamide
- Azolitmin
- Azomycin
- Azosemide(Diuretic.)
- Azoxybenzene
- Azoxystrobin
- Aztreonam(Antibacterial.)
- Azulene(Sodium sulfonate as antacid.)
- Azure A
- Azure B
- Azure C
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