2026 ICD-10-CM Drugs and Chemicals: Substances Starting with "A"
The 2026 Table of Drugs and Chemicals provides a comprehensive classification of substances including drugs, industrial solvents, corrosive gases, toxic plants, pesticides, and other potentially harmful agents. Each entry is assigned a code based on the nature of the poisoning and the external cause of the adverse effect.
Use as many codes as necessary to fully describe all reported drugs, medicinal products, or chemical substances involved.
You can browse the Table of Drugs and Chemicals alphabetically. The table below displays all substances beginning with the letter " A."
- 4-Aminobutyric acid
- 4-Aminophenol derivatives
- 8-Aminoquinoline drugs
- ABOB
- Abrine
- Abrus (seed)
- Absinthe
- Absinthe »beverage
- Acaricide
- Acebutolol
- Acecarbromal
- Aceclidine
- Acedapsone
- Acefylline piperazine
- Acemorphan
- Acenocoumarin
- Acenocoumarol
- Acepifylline
- Acepromazine
- Acesulfamethoxypyridazine
- Acetal
- Acetaldehyde (vapor)
- Acetaldehyde (vapor) »liquid
- Acetaminophen
- Acetaminosalol
- Acetanilide
- Acetarsol
- Acetazolamide
- Acetiamine
- Acetic
- Acetic »acid
- Acetic »acid »ester (solvent
- Acetic »acid »irrigating sol
- Acetic »acid »medicinal (lot
- Acetic »acid »with sodium ac
- Acetic »anhydride
- Acetic »ether (vapor)
- Acetohexamide
- Acetohydroxamic acid
- Acetomenaphthone
- Acetomorphine
- Acetone (oils)
- Acetone (oils) »chlorinated
- Acetone (oils) »vapor
- Acetonitrile
- Acetophenazine
- Acetophenetedin
- Acetophenone
- Acetorphine
- Acetosulfone (sodium)
- Acetrizoate (sodium)
- Acetrizoic acid
- Acetyl
- Acetyl »bromide
- Acetyl »chloride
- Acetylcarbromal
- Acetylcholine
- Acetylcholine »chloride
- Acetylcholine »derivative
- Acetylcysteine
- Acetyldigitoxin
- Acetyldigoxin
- Acetyldihydrocodeine
- Acetyldihydrocodeinone
- Acetylene (gas)
- Acetylene (gas) »dichloride
- Acetylene (gas) »incomplete combustion of
- Acetylene (gas) »industrial
- Acetylene (gas) »tetrachloride
- Acetylene (gas) »tetrachloride &#
- Acetylpheneturide
- Acetylphenylhydrazine
- Acetylsalicylic acid (salts)
- Acetylsalicylic acid (salts) »enteric coated
- Acetylsulfamethoxypyridazine
- Achromycin
- Achromycin »ophthalmic preparation
- Achromycin »topical NEC
- Aciclovir
- Acid (corrosive) NEC
- Acidifying agent NEC
- Acipimox
- Acitretin
- Aclarubicin
- Aclatonium napadisilate
- Aconite (wild)
- Aconitine
- Aconitum ferox
- Acridine
- Acridine »vapor
- Acriflavine
- Acriflavinium chloride
- Acrinol
- Acrisorcin
- Acrivastine
- Acrolein (gas)
- Acrolein (gas) »liquid
- Acrylamide
- Acrylic resin
- Acrylonitrile
- Actaea spicata
- Actaea spicata »berry
- Acterol
- ACTH
- Actinomycin C
- Actinomycin D
- Activated charcoal [See Also: Charcoal, medicinal]
- Acyclovir
- Adenine
- Adenine »arabinoside
- Adenosine (phosphate)
- ADH
- Adhesive NEC
- Adicillin
- Adiphenine
- Adipiodone
- Adjunct, pharmaceutical
- Adrenal (extract, cortex or medulla) (glucocorticoids) (horm
- Adrenal (extract, cortex or medulla) (glucocorticoids) (horm
- Adrenal (extract, cortex or medulla) (glucocorticoids) (horm
- Adrenal (extract, cortex or medulla) (glucocorticoids) (horm
- Adrenaline
- Adrenergic NEC
- Adrenergic NEC »blocking agent NEC
- Adrenergic NEC »blocking agent NEC
- Adrenergic NEC »specified NEC
- Adrenochrome
- Adrenochrome » (mono) semicarbazone
- Adrenochrome »derivative
- Adrenocorticotrophic hormone
- Adrenocorticotrophin
- Adriamycin
- Aerosol spray NEC
- Aerosporin
- Aerosporin »ENT agent
- Aerosporin »ophthalmic preparation
- Aerosporin »topical NEC
- Aethusa cynapium
- Afghanistan black
- Aflatoxin
- Afloqualone
- African boxwood
- Agar
- Agonist
- Agonist »predominantly
- Agonist »predominantly »alph
- Agonist »predominantly »beta
- Agricultural agent NEC
- Agrypnal
- AHLG
- Air contaminant (s), source/type NOS
- Ajmaline
- Akee
- Akrinol
- Akritoin
- Alacepril
- Alantolactone
- Albamycin
- Albendazole
- Albumin
- Albumin »bovine
- Albumin »human serum
- Albumin »human serum »salt-p
- Albumin »normal human serum
- Albuterol
- Albutoin
- Alclometasone
- Alcohol
- Alcohol »absolute
- Alcohol »absolute »beverage
- Alcohol »allyl
- Alcohol »amyl
- Alcohol »antifreeze
- Alcohol »beverage
- Alcohol »butyl
- Alcohol »dehydrated
- Alcohol »dehydrated »beverag
- Alcohol »denatured
- Alcohol »deterrent NEC
- Alcohol »diagnostic (gastric function)
- Alcohol »ethyl
- Alcohol »ethyl »beverage
- Alcohol »grain
- Alcohol »grain »beverage
- Alcohol »industrial
- Alcohol »isopropyl
- Alcohol »methyl
- Alcohol »preparation for consumption
- Alcohol »propyl
- Alcohol »propyl »secondary
- Alcohol »radiator
- Alcohol »rubbing
- Alcohol »specified type NEC
- Alcohol »surgical
- Alcohol »vapor (from any type of Alcohol)
- Alcohol »wood
- Alcuronium (chloride)
- Aldactone
- Aldesulfone sodium
- Aldicarb
- Aldomet
- Aldosterone
- Aldrin (dust)
- Alexitol sodium
- Alfacalcidol
- Alfadolone
- Alfaxalone
- Alfentanil
- Alfuzosin (hydrochloride)
- Algae (harmful) (toxin)
- Algeldrate
- Algin
- Alglucerase
- Alidase
- Alimemazine
- Aliphatic thiocyanates
- Alizapride
- Alka-seltzer
- Alkali (caustic)
- Alkaline antiseptic solution (aromatic)
- Alkalinizing agents (medicinal)
- Alkalizing agent NEC
- Alkavervir
- Alkonium (bromide)
- Alkylating drug NEC
- Alkylating drug NEC »antimyeloproliferative
- Alkylating drug NEC »lymphatic
- Alkylisocyanate
- Allantoin
- Allegron
- Allethrin
- Allobarbital
- Allopurinol
- Allyl
- Allyl »Alcohol
- Allyl »disulfide
- Allylestrenol
- Allylisopropylacetylurea
- Allylisopropylmalonylurea
- Allylthiourea
- Allyltribromide
- Allypropymal
- Almagate
- Almasilate
- Almitrine
- Aloes
- Aloglutamol
- Aloin
- Aloxidone
- Alpha
- Alpha »acetyldigoxin
- Alpha »adrenergic blocking drug
- Alpha »amylase
- Alpha »tocoferol (acetate)
- Alpha »tocopherol
- Alphadolone
- Alphaprodine
- Alphaxalone
- Alprazolam
- Alprenolol
- Alprostadil
- Alsactide
- Alseroxylon
- Alteplase
- Altizide
- Altretamine
- Alum (medicinal)
- Alum (medicinal) »nonmedicinal (ammonium) (potas
- Aluminium, aluminum
- Aluminium, aluminum »acetate
- Aluminium, aluminum »acetate
- Aluminium, aluminum »aspirin
- Aluminium, aluminum »bis (acetylsalicylate)
- Aluminium, aluminum »carbonate (gel, basic)
- Aluminium, aluminum »chlorhydroxide-complex
- Aluminium, aluminum »chloride
- Aluminium, aluminum »clofibrate
- Aluminium, aluminum »diacetate
- Aluminium, aluminum »glycinate
- Aluminium, aluminum »hydroxide (gel)
- Aluminium, aluminum »hydroxide-magnesium carb. g
- Aluminium, aluminum »magnesium silicate
- Aluminium, aluminum »nicotinate
- Aluminium, aluminum »ointment (surgical) (topica
- Aluminium, aluminum »phosphate
- Aluminium, aluminum »salicylate
- Aluminium, aluminum »silicate
- Aluminium, aluminum »sodium silicate
- Aluminium, aluminum »subacetate
- Aluminium, aluminum »sulfate
- Aluminium, aluminum »tannate
- Aluminium, aluminum »topical NEC
- Alurate
- Alverine
- Alvodine
- Amanita phalloides
- Amanitine
- Amantadine
- Ambazone
- Ambenonium (chloride)
- Ambroxol
- Ambuphylline
- Ambutonium bromide
- Amcinonide
- Amdinocilline
- Ametazole
- Amethocaine
- Amethocaine »regional
- Amethocaine »spinal
- Amethopterin
- Amezinium metilsulfate
- Amfebutamone
- Amfepramone
- Amfetamine
- Amfetaminil
- Amfomycin
- Amidefrine mesilate
- Amidone
- Amidopyrine
- Amidotrizoate
- Amiflamine
- Amikacin
- Amikhelline
- Amiloride
- Aminacrine
- Amineptine
- Aminitrozole
- Aminoacetic acid (derivatives)
- Amino acids
- Aminoacridine
- Aminobenzoic acid (-p)
- Aminocaproic acid
- Aminoethylisothiourium
- Aminofenazone
- Aminoglutethimide
- Aminohippuric acid
- Aminomethylbenzoic acid
- Aminometradine
- Aminopentamide
- Aminophenazone
- Aminophenol
- Aminophenylpyridone
- Aminophylline
- Aminopterin sodium
- Aminopyrine
- Aminorex
- Aminosalicylic acid
- Aminosalylum
- Amiodarone
- Amiphenazole
- Amiquinsin
- Amisometradine
- Amisulpride
- Amitriptyline
- Amitriptylinoxide
- Amlexanox
- Ammonia (fumes) (gas) (vapor)
- Ammonia (fumes) (gas) (vapor) »aromatic spirit
- Ammonia (fumes) (gas) (vapor) »liquid (household
- Ammoniated mercury
- Ammonium
- Ammonium »acid tartrate
- Ammonium »bromide
- Ammonium »carbonate
- Ammonium »chloride
- Ammonium »chloride »expector
- Ammonium »compounds (household) NEC
- Ammonium »compounds (household) NEC &nbs
- Ammonium »compounds (household) NEC &nbs
- Ammonium »ichthyosulronate
- Ammonium »mandelate
- Ammonium »sulfamate
- Ammonium »sulfonate resin
- Amobarbital (sodium)
- Amodiaquine
- Amopyroquin (e)
- Amoxapine
- Amoxicillin
- Amperozide
- Amphenidone
- Amphetamine NEC
- Amphomycin
- Amphotalide
- Amphotericin B
- Amphotericin B »topical
- Ampicillin
- Amprotropine
- Amsacrine
- Amygdaline
- Amyl
- Amyl »acetate
- Amyl »acetate »vapor
- Amyl »alcohol
- Amyl »chloride
- Amyl »formate
- Amyl »nitrite
- Amyl »propionate
- Amylase
- Amyleine, regional
- Amylene
- Amylene »dichloride
- Amylene »hydrate
- Amylmetacresol
- Amylobarbitone
- Amylocaine, regional
- Amylocaine, regional »infiltration (subcutaneous
- Amylocaine, regional »nerve block (peripheral) (
- Amylocaine, regional »spinal
- Amylocaine, regional »topical (surface)
- Amylopectin
- Amytal (sodium)
- Anabolic steroid
- Analeptic NEC
- Analgesic
- Analgesic »anti-inflammatory NEC
- Analgesic »anti-inflammatory NEC
- Analgesic »antirheumatic NEC
- Analgesic »aromatic NEC
- Analgesic »narcotic NEC
- Analgesic »narcotic NEC »com
- Analgesic »narcotic NEC »obs
- Analgesic »non-narcotic NEC
- Analgesic »non-narcotic NEC »
- Analgesic »pyrazole
- Analgesic »specified NEC
- Analgin
- Anamirta cocculus
- Ancillin
- Ancrod
- Androgen
- Androgen-estrogen mixture
- Androstalone
- Androstanolone
- Androsterone
- Anemone pulsatilla
- Anesthesia
- Anesthesia »caudal
- Anesthesia »endotracheal
- Anesthesia »epidural
- Anesthesia »inhalation
- Anesthesia »local
- Anesthesia »mucosal
- Anesthesia »muscle relaxation
- Anesthesia »nerve blocking
- Anesthesia »plexus blocking
- Anesthesia »potentiated
- Anesthesia »rectal
- Anesthesia »rectal »general
- Anesthesia »rectal »local
- Anesthesia »regional
- Anesthesia »surface
- Anesthetic NEC [See Also: Anesthesia]
- Anesthetic NEC [See Also: Anesthesia] »gaseous N
- Anesthetic NEC [See Also: Anesthesia] »general N
- Anesthetic NEC [See Also: Anesthesia] »halogenat
- Anesthetic NEC [See Also: Anesthesia] »infiltrat
- Anesthetic NEC [See Also: Anesthesia] »intraveno
- Anesthetic NEC [See Also: Anesthesia] »local NEC
- Anesthetic NEC [See Also: Anesthesia] »rectal
- Anesthetic NEC [See Also: Anesthesia] »rectal &n
- Anesthetic NEC [See Also: Anesthesia] »rectal &n
- Anesthetic NEC [See Also: Anesthesia] »regional
- Anesthetic NEC [See Also: Anesthesia] »spinal NE
- Anesthetic NEC [See Also: Anesthesia] »thiobarbi
- Anesthetic NEC [See Also: Anesthesia] »topical
- Anesthetic NEC [See Also: Anesthesia] »with musc
- Anesthetic NEC [See Also: Anesthesia] »with musc
- Anesthetic NEC [See Also: Anesthesia] »with musc
- Aneurine
- Angio-Conray
- Angiotensin
- Angiotensinamide
- Anhydrohydroxy-progesterone
- Anhydron
- Anileridine
- Aniline (dye) (liquid)
- Aniline (dye) (liquid) »analgesic
- Aniline (dye) (liquid) »derivatives, therapeutic
- Aniline (dye) (liquid) »vapor
- Aniscoropine
- Anise oil
- Anisidine
- Anisindione
- Anisotropine methyl-bromide
- Anistreplase
- Anorexiant (central)
- Anorexic agents
- Ansamycin
- Ant (bite) (sting)
- Antabuse
- Antacid NEC
- Antagonist
- Antagonist »Aldosterone
- Antagonist »alpha-adrenoreceptor
- Antagonist »anticoagulant
- Antagonist »beta-adrenoreceptor
- Antagonist »extrapyramidal NEC
- Antagonist »folic acid
- Antagonist »H2 receptor
- Antagonist »heavy metal
- Antagonist »narcotic analgesic
- Antagonist »opiate
- Antagonist »pyrimidine
- Antagonist »serotonin
- Antazolin (e)
- Anterior pituitary hormone NEC
- Anthelmintic NEC
- Anthiolimine
- Anthralin
- Anthramycin
- Anti-anemic (drug) (preparation)
- Anti-common-cold drug NEC
- Anti-D immunoglobulin (human)
- Anti-gastric-secretion drug NEC
- Anti-human lymphocytic globulin
- Anti-infective NEC
- Anti-infective NEC »anthelmintic
- Anti-infective NEC »antibiotics
- Anti-infective NEC »antibiotics &
- Anti-infective NEC »antimalarial
- Anti-infective NEC »antimycobacterial NEC
- Anti-infective NEC »antimycobacterial NEC
- Anti-infective NEC »antiprotozoal NEC
- Anti-infective NEC »antiprotozoal NEC &n
- Anti-infective NEC »antiviral
- Anti-infective NEC »arsenical
- Anti-infective NEC »bismuth, local
- Anti-infective NEC »ENT
- Anti-infective NEC »eye NEC
- Anti-infective NEC »heavy metals NEC
- Anti-infective NEC »local NEC
- Anti-infective NEC »local NEC
- Anti-infective NEC »mixed
- Anti-infective NEC »ophthalmic preparation
- Anti-infective NEC »topical NEC
- Anti-inflammatory drug NEC
- Anti-inflammatory drug NEC »local
- Anti-inflammatory drug NEC »nonsteroidal NEC
- Anti-inflammatory drug NEC »nonsteroidal NEC &nb
- Anti-inflammatory drug NEC »specified NEC
- Antiadrenergic NEC
- Antiallergic NEC
- Antiandrogen NEC
- Antianxiety drug NEC
- Antiaris toxicaria
- Antiarteriosclerotic drug
- Antiasthmatic drug NEC
- Antibiotic NEC
- Antibiotic NEC »aminoglycoside
- Antibiotic NEC »anticancer
- Antibiotic NEC »antifungal
- Antibiotic NEC »antimycobacterial
- Antibiotic NEC »antineoplastic
- Antibiotic NEC »b-lactam NEC
- Antibiotic NEC »cephalosporin (group)
- Antibiotic NEC »chloramphenicol (group)
- Antibiotic NEC »ENT
- Antibiotic NEC »eye
- Antibiotic NEC »fungicidal (local)
- Antibiotic NEC »intestinal
- Antibiotic NEC »local
- Antibiotic NEC »macrolides
- Antibiotic NEC »polypeptide
- Antibiotic NEC »specified NEC
- Antibiotic NEC »tetracycline (group)
- Antibiotic NEC »throat
- Anticancer agents NEC
- Anticholesterolemic drug NEC
- Anticholinergic NEC
- Anticholinesterase
- Anticholinesterase »organophosphorus
- Anticholinesterase »organophosphorus &nb
- Anticholinesterase »organophosphorus &nb
- Anticholinesterase »reversible
- Anticholinesterase »reversible &#
- Anticoagulant NEC
- Anticoagulant NEC »Antagonist
- Anticonvulsant
- Anticonvulsant »barbiturate
- Anticonvulsant »combination (with barbiturate)
- Anticonvulsant »hydantoin
- Anticonvulsant »hypnotic NEC
- Anticonvulsant »oxazolidinedione
- Anticonvulsant »pyrimidinedione
- Anticonvulsant »specified NEC
- Anticonvulsant »succinimide
- Antidepressant
- Antidepressant »monoamine oxidase inhibitor
- Antidepressant »selective serotonin norepinephri
- Antidepressant »selective serotonin reuptake inh
- Antidepressant »specified NEC
- Antidepressant »tetracyclic
- Antidepressant »triazolopyridine
- Antidepressant »tricyclic
- Antidiabetic NEC
- Antidiabetic NEC »biguanide
- Antidiabetic NEC »biguanide »
- Antidiabetic NEC »combined
- Antidiabetic NEC »sulfonylurea
- Antidiarrheal drug NEC
- Antidiarrheal drug NEC »absorbent
- Antidiphtheria serum
- Antidiuretic hormone
- Antidote NEC
- Antidote NEC »heavy metal
- Antidysrhythmic NEC
- Antiemetic drug
- Antiepilepsy agent
- Antiepilepsy agent »combination
- Antiepilepsy agent »mixed
- Antiepilepsy agent »specified, NEC
- Antiestrogen NEC
- Antifertility pill
- Antifibrinolytic drug
- Antifilarial drug
- Antiflatulent
- Antifreeze
- Antifreeze »alcohol
- Antifreeze »ethylene glycol
- Antifungal
- Antifungal »anti-infective NEC
- Antifungal »antibiotic (systemic)
- Antifungal »disinfectant, local
- Antifungal »nonmedicinal (spray)
- Antifungal »topical
- Antigonadotrophin NEC
- Antihallucinogen
- Antihelmintics
- Antihemophilic
- Antihemophilic »factor
- Antihemophilic »fraction
- Antihemophilic »globulin concentrate
- Antihemophilic »human plasma
- Antihemophilic »plasma, dried
- Antihemorrhoidal preparation
- Antiheparin drug
- Antihistamine
- Antihookworm drug
- Antihyperlipidemic drug
- Antihypertensive drug NEC
- Antikaluretic
- Antiknock (tetraethyl lead)
- Antilipemic drug NEC
- Antimalarial
- Antimalarial »prophylactic NEC
- Antimalarial »pyrimidine derivative
- Antimetabolite
- Antimitotic agent
- Antimony (compounds) (vapor) NEC
- Antimony (compounds) (vapor) NEC »anti-infective
- Antimony (compounds) (vapor) NEC »dimercaptosucc
- Antimony (compounds) (vapor) NEC »hydride
- Antimony (compounds) (vapor) NEC »pesticide (vap
- Antimony (compounds) (vapor) NEC »potassium (sod
- Antimony (compounds) (vapor) NEC »sodium dimerca
- Antimony (compounds) (vapor) NEC »tartrated
- Antimuscarinic NEC
- Antimycobacterial drug NEC
- Antimycobacterial drug NEC »antibiotics
- Antimycobacterial drug NEC »combination
- Antinausea drug
- Antinematode drug
- Antineoplastic NEC
- Antineoplastic NEC »alkaloidal
- Antineoplastic NEC »antibiotics
- Antineoplastic NEC »combination
- Antineoplastic NEC »combination &
- Antineoplastic NEC »steroid
- Antiparasitic drug (systemic)
- Antiparasitic drug (systemic) »local
- Antiparasitic drug (systemic) »specified NEC
- Antiparkinsonism drug NEC
- Antiperspirant NEC
- Antiphlogistic NEC
- Antiplatyhelmintic drug
- Antiprotozoal drug NEC
- Antiprotozoal drug NEC »blood
- Antiprotozoal drug NEC »local
- Antipruritic drug NEC
- Antipsychotic drug
- Antipsychotic drug »specified NEC
- Antipyretic
- Antipyretic »specified NEC
- Antipyrine
- Antirabies hyperimmune serum
- Antirheumatic NEC
- Antirigidity drug NEC
- Antischistosomal drug
- Antiscorpion sera
- Antiseborrheics
- Antiseptics (external) (medicinal)
- Antistine
- Antitapeworm drug
- Antitetanus immunoglobulin
- Antithrombotic
- Antithyroid drug NEC
- Antitoxin
- Antitoxin »diphtheria
- Antitoxin »gas gangrene
- Antitoxin »tetanus
- Antitrichomonal drug
- Antituberculars
- Antituberculars »antibiotics
- Antitussive NEC
- Antitussive NEC »codeine mixture
- Antitussive NEC »opiate
- Antivaricose drug
- Antivenin, antivenom (sera)
- Antivenin, antivenom (sera) »crotaline
- Antivenin, antivenom (sera) »spider bite
- Antivertigo drug
- Antiviral drug NEC
- Antiviral drug NEC »eye
- Antiwhipworm drug
- Antrol [See Also: by specific chemical substance]
- Antrol [See Also: by specific chemical substance]
- ANTU (alpha naphthylthiourea)
- Apalcillin
- APC
- Aplonidine
- Apomorphine
- Appetite depressants, central
- Apraclonidine (hydrochloride)
- Apresoline
- Aprindine
- Aprobarbital
- Apronalide
- Aprotinin
- Aptocaine
- Aqua fortis
- Ara-A
- Ara-C
- Arachis oil
- Arachis oil »cathartic
- Aralen
- Arecoline
- Arginine
- Arginine »glutamate
- Argyrol
- Argyrol »ENT agent
- Argyrol »ophthalmic preparation
- Aristocort
- Aristocort »ENT agent
- Aristocort »ophthalmic preparation
- Aristocort »topical NEC
- Aromatics, corrosive
- Aromatics, corrosive »disinfectants
- Arsenate of lead
- Arsenate of lead »herbicide
- Arsenic, arsenicals (compounds) (dust) (vapor) NEC
- Arsenic, arsenicals (compounds) (dust) (vapor) NEC &#
- Arsenic, arsenicals (compounds) (dust) (vapor) NEC &#
- Arsine (gas)
- Arsphenamine (silver)
- Arsthinol
- Artane
- Arthropod (venomous) NEC
- Articaine
- Asbestos
- Ascaridole
- Ascorbic acid
- Asiaticoside
- Asparaginase
- Aspidium (oleoresin)
- Aspirin (aluminum) (soluble)
- Aspoxicillin
- Astemizole
- Astringent (local)
- Astringent (local) »specified NEC
- Astromicin
- Ataractic drug NEC
- Atenolol
- Atonia drug, intestinal
- Atophan
- Atracurium besilate
- Atropine
- Atropine »derivative
- Atropine »methonitrate
- Attapulgite
- Auramine
- Auramine »dye
- Auramine »fungicide
- Auranofin
- Aurantiin
- Aureomycin
- Aureomycin »ophthalmic preparation
- Aureomycin »topical NEC
- Aurothioglucose
- Aurothioglycanide
- Aurothiomalate sodium
- Aurotioprol
- Automobile fuel
- Autonomic nervous system agent NEC
- Avlosulfon
- Avomine
- Axerophthol
- Azacitidine
- Azacyclonol
- Azadirachta
- Azanidazole
- Azapetine
- Azapropazone
- Azaribine
- Azaserine
- Azatadine
- Azatepa
- Azathioprine
- Azelaic acid
- Azelastine
- Azidocillin
- Azidothymidine
- Azinphos (ethyl) (methyl)
- Aziridine (chelating)
- Azithromycin
- Azlocillin
- Azobenzene smoke
- Azobenzene smoke »acaricide
- Azosulfamide
- AZT
- Aztreonam
- Azulfidine
- Azuresin
- P-Acetamidophenol
