- Aspirin Tablets
- Aspirin and Codeine
- Aspirin and Extended-Release Dipyridamole
- Aspirin, Butalbital, and Caffeine
- Aspirin, Coated
- Aspirin, Sodium Bicarbonate, and Citric Acid
- Aspirin-Free Excedrin Caplets
- Aspirtab
- Aspirtab-Max
- Astelin
- AsthmaNefrin
- Asthmahaler Mist
- Astone
- Astracaine 4%
- Astracaine 4% Forte
- Astramorph
- Astramorph PF
- Astrin
- Atacand
- Atacand HCT
- Atacand HCT containing Candesartan Cilexetil and Hydrochlorothiazide
- Atacand HCT containing Hydrochlorothiazide and Candesartan
- Atamet
- Atarax
- Atasol Caplets
- Atasol Drops
- Atasol Forte Caplets
- Atasol Forte Tablets
- Atasol Oral Solution
- Atasol Tablets
- Atasol-15
- Atasol-30
- Atasol-8
- Atazanavir
| - Atenolol
- Ativan
- Atolone
- Atomoxetine
- Atorvastatin
- Atovaquone
- Atovaquone and Proguanil
- Atretol
- Atridox
- Atrohist Pediatric
- Atrohist Pediatric Suspension Dye Free
- Atrohist Pediatric containing Chlorpheniramine Maleate and Pseudoephedrine Hydrochloride
- Atromid-S
- Atropair
- Atropine Care
- Atropine Ophthalmic
- Atropine Sulfate S.O.P.
- Atropine, Homatropine, and Scopolamine
- Atropine, Hyoscyamine, Methenamine, Methylene Blue, Phenyl Salicylate, and Benzoic Acid
- Atropisol
- Atrosept
- Atrosulf
- Atrovent
- Atrovent HFA
- Attain
- Attapulgite
- Attenuvax
- Augmentin
- Auralgan
- Auranofin
- Aureomycin
- Aurodex
- Auroto
| - Avalide
- Avalide containing Hydrochlorothiazide and Irbesartan
- Avalide containing Irbesartan and Hydrochlorothiazide
- Avandamet
- Avandia
- Avapro
- Avastin
- Avelox
- Aventyl
- Avirax
- Avita
- Avlosulfon
- Avodart
- Avonex
- Axert
- Axid
- Axid AR
- Axocet containing Acetaminophen and Butalbital
- Axotal
- Ayercillin
- Aygestin
- Azacitidine
- Azactam
- Azathioprine
- Azelaic Acid
- Azelaic Acid Topical
- Azelastine
- Azelastine Nasal Spray
- Azelastine Ophthalmic
- Azelex
- Azidothymidine Injection
- Azithromycin
- Azmacort
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