List of drugs: As–Az
as
- Asacol
- Asaphen
- Asbron
- Asceniv
- ascorbic acid
- Ascorbicap
- Ascriptin
- Asellacrin 10
- aselizumab
- asenapine
- Asendin
- aseripide
- Aservo Equihaler
- asfotase alfa
- asimadoline
- Asmalix, also known as theophylline.
- asobamast
- asocainol
- asoprisnil
- asparaginase
- aspartame
- aspartic acid
- aspartocin
- Aspercin
- Aspergum
- aspirin
- aspoxicillin
- Astelin
- astemizole
- Astramorph PF
- astromicin
- astuprotimut-R
- '''asunaprevir'''
at
ata-atn
- Atabrine
- Atacand
- atacicept
- ataciguat
- atagabalin
- ataluren
- atamestane
- ataprost
- Atapryl
- Atarax
- Atasol
- atazanavir
- atecegatran fexenetil
- atecegatran
- Atehexal
- atenolol
- atevirdine
- atexakin alfa
- ATG
- Atgam
- Athrombin-K
- Athrombin
- atibeprone
- atidarsagene autotemcel
- atiglifozin
- atilmotin
- atinumab
- atinvicitinib
- atiratecan
- atipamezole
- atiprimod
- atiprosin
- Ativan
- atizoram
- atliprofen
- '''Atnaa'''
ato-atz
- atolide
- Atolone Oral
- atomoxetine
- atopaxar
- atorolimumab
- Atorvaliq
- atorvastatin
- atosiban
- atovaquone
- Atozine Oral
- atracurium besilate
- atrasentan
- atreleuton
- atriciguat
- Atridox
- atrimustine
- atrinositol
- Atrohist Plus
- atromepine
- Atromid-S
- Atropen
- atropine
- atropine methonitrate
- atropine oxide
- Atrosept
- Atrovent
- Attenuvax
- Attrogy
- Attruby
- '''Atzumi'''
au
- Aucatzyl
- Augmentin
- Augtyro
- Auralgan
- auranofin
- Aureomycin
- Aurexis
- Aurodex
- Aurolate
- aurothioglycanide
- Auroto
- Aususvar
- '''Autoplex T'''
av
- avagacestat
- Avagard
- Avage
- Avalide
- Avance
- Avmapki
- Avmapki Fakzynja
- avanafil
- Avandamet
- Avandia
- Avapro
- AVAR
- avasimibe
- Avastin
- Avaxim
- AVC
- Aveeno Cleansing Bar
- Avelox
- Aventyl
- Avgemsi
- Aviane
- avibactam
- avicatonin
- avilamycin
- Avinza
- aviptadil
- aviscumine
- Avita
- Avitene
- avitriptan
- avizafone
- Avlosulfon
- avobenzone
- Avodart
- Avonex
- avoparcin
- avorelin
- avosentan
- avotermin
- avridine
- Avtozma
- '''Avzivi'''
aw-ay
- Awiqli
- axamozide
- axatilimab
- Axberi
- Axberi HP
- Axert
- axicabtagene ciloleucel
- Axid
- axitinib
- Axocet
- axomadol
- Axotal
- Aybintio
- Aygestin
- '''Ayradia'''
az
aza
azab-azaq
- azabon
- azabuperone
- azacitidine
- azaclorzine
- azaconazole
- azacosterol
- Azactam
- azacyclonol
- azaftozine
- Azahexal [Au], also known as azathioprine.
- azalanstat
- azalomycin
- azaloxan
- azamethonium bromide
- azamulin
- azanator
- azanidazole
- azaperone
- azaprocin
- azapropazone
- '''azaquinzole'''
azar-azat
- azaribine
- Azasan
- azaserine
- azasetron
- azaspirium chloride
- azastene
- azatadine
- azatepa
- '''azathioprine'''
azd-azm
- Azdone
- azelaic acid
- azelastine
- Azelex
- azelnidipine
- azepexole
- azepindole
- azetirelin
- azficel-T
- azidamfenicol
- azidocillin
- azilsartan
- azilsartan kamedoxomil
- azilsartan medoxomil
- azimexon
- azimilide
- azintamide
- azipramine
- azithromycin
- Azlin
- azlocillin
- '''Azmacort'''
azo-azu
- Azo Gantanol
- Azo Gantrisin
- Azolid
- azolimine
- Azopt
- azosemide
- azotomycin
- azoximer bromide
- aztreonam
- Azulfidine
- '''azumolene'''