- Obeticholic Acid
- Obinutuzumab Injection
- Ocaliva?see Obeticholic Acid
- Ocella? (as a combination product containing Drospirenone, Ethinyl Estradiol)see Estrogen and Progestin (Oral Contraceptives)
- Ocrelizumab Injection
- Ocrevus?see Ocrelizumab Injection
- Octreotide
- Octreotide Injection
- Ocu-Cort? (as a combination product containing Bacitracin Zinc, Hydrocortisone, Neomycin, Polymyxin B Sulfates)see Bacitracin Ophthalmic
- Ocu-Mycin?see Gentamicin Ophthalmic
- Ocu-Tropine?see Atropine Ophthalmic
- Ocufen?see Flurbiprofen Ophthalmic
- Ocuflox?see Ofloxacin Ophthalmic
- Odefsey? (as a combination product containing Emtricitabine, Rilpivirine, Tenofovir)see Emtricitabine, Rilpivirine, and Tenofovir
- Odevixibat
- Odomzo?see Sonidegib
- Ofatumumab Injection (Chronic Lymphocytic Leukemia)
- Ofatumumab Injection (Multiple Sclerosis)
- Ofev?see Nintedanib
- Ofirmev?see Acetaminophen Injection
- Ofloxacin
- Ofloxacin Ophthalmic
- Ofloxacin Otic
- Ogen? Creamsee Estrogen Vaginal
- Ogen? Tablets (estropipate)see Estrogen
- Ogestrel? (as a combination product containing Ethinyl Estradiol, Norgestrel)see Estrogen and Progestin (Oral Contraceptives)
- Ogivri? (trastuzumab-dkst)see Trastuzumab Injection
- Ogsiveo?see Nirogacestat
- Ohtuvayre?see Ensifentrine Oral Inhalation
- Ojjaara?see Momelotinib
- Ojmeda?see Tovorafenib
- Olanzapine
- Olanzapine and Samidorphan
- Olanzapine Injection
- Olaparib
- Olaratumab Injection
- Oleptro?see Trazodone
- Oliceridine Injection
- Olinvyk?see Oliceridine Injection
- Olmesartan
- Olodaterol Oral Inhalation
- Olopatadine Nasal Spray
- Olopatadine Ophthalmic
- Olsalazine
- Olumiant?see Baricitinib
- Olutasidenib
- Olux?see Clobetasol Topical
- Olysio?see Simeprevir
- Omacetaxine Injection
- Omadacycline
- Omadacycline Injection
- Omalizumab Injection
- Ombitasvir, Paritaprevir, and Ritonavir
- Ombitasvir, Paritaprevir, Ritonavir, and Dasabuvir
- Omeclamox-Pak?see Omeprazole, Clarithromycin, and Amoxicillin
- Omega-3 Fatty Acids
- Omeprazole
- Omeprazole, Clarithromycin, and Amoxicillin
- Omidenepag Isopropyl Ophthalmic
- Omlonti?see Omidenepag Isopropyl Ophthalmic
- Omnaris?see Ciclesonide Nasal Spray
- Omnicef?see Cefdinir
- Omnihist II LA? (as a combination product containing Chlorpheniramine, Methscopolamine, Phenylephrine)see Phenylephrine
- Omnihist? LA (as a combination product containing Chlorpheniramine Maleate, Methscopolamine Nitrate, and Phenylephrine Hydrochloride)see Chlorpheniramine
- Omnipen?see Ampicillin
- Omnipen-N?see Ampicillin Injection
- Omnipred?see Prednisolone Ophthalmic
- Omnitrope?see Somatropin
- Omtryg?see Omega-3 Fatty Acids
- Omvoh?see Mirikizumab-mrkz Injection
- OnabotulinumtoxinA Injection
- Oncaspar?see Pegaspargase Injection
- Oncovin?see Vincristine Injection
- Ondansetron
- Ondansetron Injection
- Onfi?see Clobazam
- Ongentys?see Opicapone
- Onglyza?see Saxagliptin
- Onivyde?see Irinotecan Lipid Complex Injection
- Onmel?see Itraconazole
- Onsolis?see Fentanyl
- Ontak?see Denileukin Diftitox Injection
- Onturzant? (trastuzumab-dttb)see Trastuzumab Injection
- Onureg?see Azacitidine
- Onyda? XRsee Clonidine
- Onzetra Xsail? Nasal Powdersee Sumatriptan Nasal
- Opalescence?see Fluoride
- Opana?see Oxymorphone
- Opana? ERsee Oxymorphone
- Opcicon? One-Stepsee Levonorgestrel
- Opdivo?see Nivolumab Injection
- Opdualag?see Nivolumab and relatlimab-rmbw
- Opfolda?see Miglustat
- Opicapone
- Opill?see Progestin-Only (norgestrel) Oral Contraceptives
- Opsumit?see Macitentan
- Opsynvi?see Macitentan and Tadalafil
- Optigene? 3see Tetrahydrozoline Ophthalmic
- OptiPranolol?see Metipranolol Ophthalmic
- Optivar?see Azelastine Ophthalmic
- Opuviz? (aflibercept-yszy)see Aflibercept Injection
- OPVsee Polio Vaccine
- Opvee?see Nalmefene Nasal Spray
- Opzelura?see Ruxolitinib Topical
- Ora-Line?see Fluoride
- Ora-Testryl?see Fluoxymesterone
- Oracea?see Doxycycline
- Oral Defense?see Fluoride
- Oral-B?see Fluoride
- Oralone? Dental Pastesee Triamcinolone Topical
- Oramorph? SRsee Morphine
- Orap?see Pimozide
- Orapred?see Prednisolone
- Orasone?see Prednisone
- Oratuss? (as a combination product containing Carbetapentane, Guaifenesin, Phenylephrine)see Phenylephrine
- Oravig?see Miconazole Buccal
- Orbactiv?see Oritavancin Injection
- Orencia?see Abatacept Injection
- Orenitram?see Treprostinil
- Oretic?see Hydrochlorothiazide
- ORGAN-I NR?see Guaifenesin
- Orgatrax?see Hydroxyzine
- Orgovyx?see Relugolix
- Oriahnn?see Elagolix, Estradiol, and Norethindrone
- Orilissa?see Elagolix
- Orinase?see Tolbutamide
- Oritavancin Injection
- Orkambi?see Lumacaftor and Ivacaftor
- Orlistat
- Orphenadrine
- Orphengesic? (as a combination product containing Aspirin, Caffeine, Orphenadrine)see Orphenadrine
- Orphengesic? (as a combination product containing Aspirin, Caffeine, Orphenadrine)see Aspirin
- Orserdu?see Elacestrant
- Ortho Guard?see Fluoride
- Ortho Tri-Cyclen? (as a combination product containing Ethinyl Estradiol, Norgestimate)see Estrogen and Progestin (Oral Contraceptives)
- Ortho Tri-Cyclen? Lo (as a combination product containing Ethinyl Estradiol, Norgestimate)see Estrogen and Progestin (Oral Contraceptives)
- Ortho-Cept? (as a combination product containing Desogestrel, Ethinyl Estradiol)see Estrogen and Progestin (Oral Contraceptives)
- Ortho-Cyclen? (as a combination product containing Ethinyl Estradiol, Norgestimate)see Estrogen and Progestin (Oral Contraceptives)
- Ortho-est? (estropipate)see Estrogen
- Ortho-Novum? 1/35 (as a combination product containing Ethinyl Estradiol, Norethindrone)see Estrogen and Progestin (Oral Contraceptives)
- Ortho-Novum? 1/50 [DSC] (as a combination product containing Mestranol, Norethindrone)see Estrogen and Progestin (Oral Contraceptives)
- Orudis?see Ketoprofen
- Orudis? KTsee Ketoprofen
- Oruvail?see Ketoprofen
- Orvaten?see Midodrine
- Os-Cal 500?see Calcium Carbonate
- Oscimin?see Hyoscyamine
- Oscion?see Benzoyl Peroxide Topical
- Oseltamivir
- Oseni? (as a combination product containing Alogliptin, Pioglitazone)see Alogliptin
- Oseni? (as a combination product containing Alogliptin, Pioglitazone)see Pioglitazone
- Osimertinib
- Osmolex ER?see Amantadine
- OsmoPrep,?see Sodium Phosphate
- Ospemifene
- Osphena?see Ospemifene
- Oteseconazole
- Otezla?see Apremilast
- Otiprio?see Ciprofloxacin Otic
- Otrexup?see Methotrexate Injection
- Ovcon? (as a combination product containing Ethinyl Estradiol, Norethindrone)see Estrogen and Progestin (Oral Contraceptives)
- Ovide?see Malathion Topical
- Ovrette?see Progestin-Only (norethindrone) Oral Contraceptives
- Oxacillin Injection
- Oxaliplatin Injection
- Oxandrin?see Oxandrolone
- Oxandrolone
- Oxaprozin
- Oxaydo?see Oxycodone
- Oxazepam
- Oxbryta?see Voxelotor
- Oxcarbazepine
- Oxervate?see Cenegermin-bkbj Ophthalmic
- Oxiconazole
- Oxilapinesee Loxapine
- Oxistat?see Oxiconazole
- Oxtellar XR?see Oxcarbazepine
- Oxy 10?see Benzoyl Peroxide Topical
- Oxy? Clinical Advanced Face Washsee Salicylic Acid Topical
- Oxy? Maximum Cleansing Padssee Salicylic Acid Topical
- Oxybate Sodiumsee Sodium Oxybate
- Oxybutynin
- Oxybutynin Topical
- Oxybutynin Transdermal Patch
- Oxycet? (as a combination product containing Acetaminophen, Oxycodone)see Oxycodone
- Oxycodone
- Oxycontin?see Oxycodone
- Oxymetazoline Nasal Spray
- Oxymetazoline Topical
- Oxymorphone
- Oxytocin Injection
- Oxytrol?see Oxybutynin Transdermal Patch
- Ozanimod
- Ozempic?see Semaglutide Injection
- Ozenoxacin
- Ozobax?see Baclofen
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