
  | octreotide acetate (Sandostatin, Sandostatin LAR) |
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  | Oesclim (estradiol patch) |
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  | ofloxacin (Apo-Oflox, Floxin, Novo-Ofloxacin) |
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  | Ogen (estropipate) |
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  | olanzapine (Zyprexa, Zyprexa IM, Zyprexa Zydis) |
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  | olanzapine (generic) (Novo-Olanzapine) |
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  | olmesartan (Olmetec) |
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  | olmesartan - hydrochlorothiazide (Olmetec Plus) |
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  | Olmetec (olmesartan) |
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  | Olmetec Plus (olmesartan - hydrochlorothiazide) |
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  | olopatadine (Patanol) |
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  | olsalazine (Dipentum) |
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  | omalizumab (Xolair) |
 |

  | omeprazole (Apo-Omeprazole, Losec, ratio-Omeprazole, Sandoz Omeprazole) |
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  | Omnaris (ciclesonide nasal spray) |
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  | Oncotice (bacillus Calmette-Guerin) |
 |

  | ondansetron (Apo-Ondansetron, Mylan-Ondansetron, Novo-Ondansetron, pms-Ondansetron, RAN-Ondansetron, ratio-Ondansetron, Sandoz Ondansetron, Zofran) |
 |

  | Opticrom (sodium cromoglycate eye drops) |
 |

  | Optimyxin Solution (polymixin b - gramicidin) |
 |

  | Oracort (triamcinolone dental paste) |
 |

  | oral iron - gluconate; fumarate; sulfate (Apo-Ferrous Gluconate, Apo-Ferrous Sulfate, Fer-In-Sol, Ferodan, Novo-Ferrogluc, Palafer, pms-Ferrous Sulfate) |
 |

  | Orap (pimozide) |
 |

  | orciprenaline sulfate (Apo-Orciprenaline) |
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  | Orencia (abatacept) |
 |

  | Orfenace (orphenadrine) |
 |

  | Orgalutran (ganirelix injection) |
 |

  | orlistat (Xenical) |
 |

  | ORO-Clense (chlorhexidine gluconate oral rinse) |
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  | orphenadrine (Norflex, Orfenace, Sandoz Orphenadrine) |
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  | Ortho (norethindrone - ethinyl estradiol) |
 |

  | Orthocept (desogestrel - ethinyl estradiol) |
 |

  | oseltamivir (Tamiflu) |
 |

  | Otrivin (xylometazoline nasal) |
 |

  | Ovidrel (choriogonadotropin alpha) |
 |

  | Ovral 21 (norgestrel - ethinyl estradiol) |
 |

  | Ovral 28 (norgestrel - ethinyl estradiol) |
 |

  | oxaliplatin (Eloxatin) |
 |

  | oxaprozin (Apo-Oxaprozin, Daypro) |
 |

  | oxazepam (Apo-Oxazepam) |
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  | oxcarbazepine (Apo-Oxcarbazepine, Trileptal) |
 |

  | Oxeze (formoterol fumarate dihydrate) |
 |

  | oxprenolol (Trasicor) |
 |

  | Oxsoralen (methoxsalen) |
 |

  | Oxsoralen-Ultra (methoxsalen) |
 |

  | oxtriphylline (Choledyl) |
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  | oxtriphylline - guaifenesin (Choledyl Expectorant) |
 |

  | Oxy.IR (oxycodone) |
 |

  | Oxybutyn (oxybutynin) |
 |

  | oxybutynin (Apo-Oxybutynin, Ditropan XL, Mylan-Oxybutynin, Novo-Oxybutynin, Nu-Oxybutyn, Oxybutyn, Oxytrol, Phl-Oxybutynin, PMS-Oxybutynin) |
 |

  | oxybutynin controlled-release (Uromax) |
 |

  | oxycodone (Oxy.IR, OxyContin, Supeudol) |
 |

  | oxycodone - acetaminophen (Endocet, Percocet, Percocet-Demi, PMS-Oxycodone- Acetaminophen, ratio-Oxycocet) |
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  | OxyContin (oxycodone) |
 |

  | Oxyderm (benzoyl peroxide topical) |
 |

  | oxymetazoline eye drops (Claritin Eye Allergy Relief) |
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  | oxymetazoline nasal spray - Claritin (Claritin Allergic Congestion Relief) |
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  | oxymetazoline nasal spray - Dristan (Dristan Long Lasting Nasal Mist 0.05%) |
 |

  | Oxytrol (oxybutynin) |
 |