| BRAND | GENERIC NAME |
| Octreotide Acetate | Sandostatin |
| Octreotide Acetate Injection | Sandostatin LAR |
| Ocucoat | Hydroxypropylmethylcellulose |
| Ocufen | Flurbiprofen Sodium Ophthalmic Solution |
| Ocuflox | Ofloxacin Ophthalmic |
| Ofloxacin | Floxin |
| Ofloxacin Ophthalmic | Ocuflox |
| Ofloxacin Ophthalmic Solution | Ofloxacin Ophthalmic Solution |
| Ofloxacin Otic Solution | Floxin Otic |
| Ofloxacin Otic Solution | Floxin Otic Singles |
| Ogen | Estropipate |
| Olanzapine | Zyprexa |
| Olanzapine and fluoxetine | Symbyax |
| Olmesartan Medoxomil | Benicar |
| Olmesartan Medoxomil-Hydrochlorothiazide | Benicar HCT |
| Olopatadine | Patanol |
| Olopatadine Hydrochloride Nasal Spray | Patanase Nasal Spray |
| Olopatadine Hydrochloride Ophthalmic Solution | Pataday |
| Olsalazine Sodium Capsules | Dipentum |
| Olux | Clobetasol Propionate |
| Olux-E | Clobetasol Propionate Foam |
| Omalizumab | Xolair |
| Omega-3-Acid Ethyl Esters | Lovaza |
| Omeprazole | Prilosec |
| Omeprazole, Sodium Bicarbonate | Zegerid |
| Omnaris | Ciclesonide Nasal Spray |
| Omnicef | Cefdinir |
| Omnipred | Prednisolone Acetate |
| Omniscan | Gadodiamide |
| Omnitrope | Somatropin [ rDNA origin] Injection |
| Oncaspar | Pegaspargase |
| Ondansetron Hydrochloride | Zofran |
| Ondansetron Hydrochloride Injection | Zofran Injection |
| Ontak | Denileukin Diftitox |
| Opana | Oxymorphone Hydrochloride |
| Opana ER | Oxymorphone Hydrochloride Extended Release |
| Oprelvekin | Neumega |
| Opticrom | Cromolyn Sodium Ophthalmic Solution |
| OptiMARK | Gadoversetamide Injection |
| Optipranolol | Metipranolol Ophthalmic Solution |
| Optiray Injection | Ioversol Injection |
| Optison | Perflutren Protein-Type A Microspheres |
| Optivar | Azelastine hydrochloride |
| Oracea | Doxycycline |
| Oral Poliovirus Vaccine | Orimune |
| Orap | Pimozide |
| Orapred ODT | Prednisolone Sodium Phosphate |
| Orencia | Abatacept |
| Orfadin | Nitisinone |
| Organidin NR | Guaifenesin |
| Orimune | Oral Poliovirus Vaccine |
| Orlaam | Levomethadyl Acetate |
| Orlistat 120 mg | Xenical |
| Orlistat 60 mg | Alli |
| Orphenadrine | Norflex |
| Orphenadrine Citrate with Aspirin and Caffeine | Norgesic |
| Orphenadrine Citrate, Asprin and Caffeine Tablets | Orphengesic |
| Orphengesic | Orphenadrine Citrate, Asprin and Caffeine Tablets |
| Ortho Evra | Norelgestromin, Ethinyl Estradiol |
| Ortho Micronor | Norethindrone |
| Ortho Tri-Cyclen / Ortho-Cyclen | Norgestimate and Ethinyl Estradiol |
| Ortho-Novum | Norethindrone and Ethinyl Estradiol |
| Ortho-Tri-Cyclen Lo | Norgestimate, Ethinyl Estradiol |
| Orudis | Ketoprofen |
| Oseltamivir Phosphate | Tamiflu |
| Osmitrol Injection in Aviva | Mannitol Injection in Aviva Plastic Container |
| Osmitrol Injection in Viaflex | Mannitol Injection in Viaflex Plastic Container |
| OsmoPrep | Sodium Phosphate Monobasic Monohydrate and Sodium Phosphate Dibasic Anhydrous |
| Ovcon | Norethindrone and Ethinyl Estradiol Tablets |
| Ovide | Malathion |
| Ovidrel | Choriogonadotropin Alfa Injection |
| Oxacillin | Oxacillin for Injection |
| Oxacillin for Injection | Oxacillin |
| Oxaliplatin Injection | Eloxatin |
| Oxandrin | Oxandrolone |
| Oxandrolone | Oxandrin |
| Oxaprozin | Daypro Alta |
| Oxaprozin Caplets | Daypro |
| Oxazepam | Serax |
| Oxcarbazepine | Trileptal |
| Oxiconazole | Oxistat |
| Oxilan | Ioxilan |
| Oxistat | Oxiconazole |
| Oxsoralen-Ultra | Methoxsalen Capsules |
| Oxybutynin Chloride 10 % Gel | Gelnique |
| Oxybutynin Chloride Extended Release Tablets | Ditropan XL |
| Oxybutynin Tablets and Syrup | Ditropan |
| Oxybutynin Transdermal | Oxytrol |
| Oxycodone and Acetaminophen | Percocet |
| Oxycodone and Acetaminophen Capsules | Tylox |
| Oxycodone and Acetaminophen Tablets | Endocet |
| Oxycodone HCl | Oxycontin |
| Oxycodone HCl and Ibuprofen | Combunox |
| Oxycodone Hydrochloride | Roxicodone |
| Oxycodone Hydrochloride | Roxicodone 15, 30 mg |
| Oxycontin | Oxycodone HCl |
| Oxymetholone | Anadrol-50 |
| Oxymorphone | Numorphan |
| Oxymorphone Hydrochloride | Opana |
| Oxymorphone Hydrochloride Extended Release | Opana ER |
| Oxytetracycline | Terramycin |
| Oxytetracycline and Hydrocortisone | Terra-Cortril |
| Oxytetracycline,Sulfamethizole and Phenazopyridine | Urobiotic |
| Oxytocin Injection | Pitocin |
| Oxytrol | Oxybutynin Transdermal |
