- absinthium
- acarbose
- acebutolol
- acerola
- acetazolamide
- acetic acid
- acetone
- acetylcholine
- acetylcysteine
- acetylsalicylic acid
- achillea
- achillea millefolium
- aciclovir
- acid hydrochloric
- acipimox
- aconitum napellus
- acriflavine
- activated attapulgite
- acyclovir
- adrenaline
- aesculin
- aesculus
- african ginger
- agar
- albendazole
- alcohol
- alemtuzumab
- alfentanil
- alginic acid
- allantoin
- allopurinol
- aloes
- aloin
- alphacalcidol
- alprazolam
- alprostadil
- althaea
- aluminium chlorhydroxide complex
- aluminium chloride hexahydrate
- aluminium dihydroxyallantoinate
- aluminium hydroxide
- aluminium hydroxide + magnesium hydroxide + simethicone + methylcellulose
- aluminium hydroxide + magnesium trisilicate
- aluminium hydroxide gel
- aluminium hydroxide gel + magnesium trisilicate
- aluminium oxide
- ambuphylline
- amethocaine
- amikacin
- amiloride
- amiloride + hydrochlorothiazide
- amino acids
- aminopentamide
- aminophyline
- aminophylline
- amiodarone
- amitriptyline
- amlodipine
- ammonia spirit, aromatic
- ammonium chloride
- amoxicillin
- amoxicillin + clavulanic acid
- amoxycillin
- amoxycillin + clavulanic acid
- amoxycillin sodium
- amphotericin b
- amphotericin b + tetracycline
- ampicillin
- ampicillin sodium
- amylase
- amylmetacresol
- amylobarbitone
- anaesthetic ether
- aneurine
- anise oil
- aniseed oil
- anisi
- antazoline
- antazoline + tetrahydrozoline
- antimonit
- antipyrine
- apatit
- apis
- apraclonidine
- aprotinin
- arachis oil
- arachis oil extract of coal tar
- arachis oil extract of crude coal tar
- archangelica
- arnica
- artichoke
- asafoetida
- ascorbic acid
- asparaginase
- aspidium filix-mas
- aspirin
- aspirin + caffeine citrate
- aspirin + vitamin c
- astemizole
- atenolol
- atenolol + chlorthalidone
- atorvastatin
- atropine
- atropine sulphate
- auranofin
- aurum met
- avena
- azapropazone
- azathioprine
- azelaic acid
- azithromycin
- aztreonam
