abacavir abacavir sulfate abatacept abemaciclib abietis oil abiraterone acetate abrocitinib acalabrutinib acalabrutinib maleate acamprosate calcium acarbose acebutolol hydrochloride aceclofenac acemetacin acenocoumarol acetazolamide acetic acid acetylcholine chloride acetylcysteine acetylsalicylic acid aciclovir aciclovir sodium acipimox acitretin aclidinium bromide acrivastine activated charcoal activated dimeticone adalimumab adapalene adefovir dipivoxil adenosine adenovirus type 26 encoding the SARS-CoV-2 spike glycoprotein (Ad26.COV2-S) adrenaline adrenaline acid tartrate adrenaline tartrate afatinib dimaleate aflibercept agalsidase alfa agalsidase beta agnus castus agomelatine alanine albutrepenonacog alfa alclometasone dipropionate alder pollen (Alnus spp.) aldesleukin alectinib hydrochloride alemtuzumab alendronate sodium alendronate sodium trihydrate alexandrian senna fruit alfacalcidol alfentanil hydrochloride alfuzosin hydrochloride alginic acid alglucosidase alfa alimemazine tartrate alirocumab alitretinoin allantoin allopurinol almotriptan d, l-hydrogen malate alogliptin benzoate alpelisib alprazolam alprostadil alteplase alternaria alternata aluminium chloride hexahydrate aluminium hydroxide aluminium hydroxide gel aluminium hydroxide, dried aluminium sulfate alverine citrate amantadine hydrochloride ambrisentan amifampridine phosphate amikacin sulfate amiloride hydrochloride amiloride hydrochloride anhydrous amiloride hydrochloride dihydrate aminoacridine hydrochloride aminophylline aminophylline hydrate amiodarone hydrochloride amisulpride amitriptyline hydrochloride amivantamab amlodipine besilate amlodipine maleate amlodipine mesilate monohydrate ammonia liquor ammonia solution, aromatic ammonia solution, strong ammonium salicylate amorolfine hydrochloride amoxicillin amoxicillin sodium amoxicillin trihydrate amphotericin b amphotericin B ampicillin sodium ampicillin trihydrate amsacrine amylase amylmetacresol anagrelide hydrochloride anagrelide hydrochloride monohydrate anakinra anastrozole andexanet alfa andusomeran angiotensin II anidulafungin antazoline sulfate antihaemophilic factor apalutamide apixaban apomorphine hydrochloride apomorphine hydrochloride hemihydrate apraclonidine hydrochloride apremilast aprepitant aprotinin arachis oil argatroban monohydrate arginine arginine hydrochloride argipressin argipressin acetate aripiprazole arnica montana arnica tincture arsenic trioxide artemether asciminib hydrochloride ascorbic acid asenapine maleate asfotase alfa asparaginase aspartic acid aspirin ataluren atazanavir sulfate atenolol atezolizumab atidarsagene autotemcel atogepant atomoxetine atomoxetine hydrochloride atorvastatin calcium atorvastatin calcium trihydrate atosiban acetate atovaquone atracurium besilate atropine sulfate atropine sulfate monohydrate avacopan avalglucosidase alfa avanafil avapritinib avatrombopag maleate avelumab avibactam sodium axicabtagene ciloleucel axitinib azacitidine azathioprine azelaic acid azelastine hydrochloride azilsartan medoxomil potassium azithromycin dihydrate aztreonam aztreonam lysine