# List of drugs: O–Op

This multi-page article lists pharmaceutical drugs alphabetically by name. Many drugs have more than one name and, therefore, the same drug may be listed more than once. Brand names and generic names are differentiated by capitalizing brand names.
See also the list of the top 100 bestselling branded drugs, ranked by sales.
Abbreviations are used in the list as follows:
* INN = International nonproprietary name
* BAN = British Approved Name
* USAN = United States Adopted Name
* Two-letter codes for countries
Lists of drugs 1–9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
Oa–Op | Oq–Ow | Ox–Oz

## o
### ob

* obatoclax mesylate (USAN)
* obecabtagene autoleucel (USAN, INN)
* oberadilol (INN)
* Obestin-30
* obeticholic acid (USAN, INN)
* obidoxime chloride (INN)
* oblimersen (INN)
* Obodence
* Obredon
* Oby-Trim

### oc
#### oca-ocr

* Ocaliva
* ocaperidone (INN)
* ocfentanil (INN)
* ociltide (INN)
* ocinaplon (INN)
* ocrase (INN)
* ocrelizumab (INN)
* Ocrevus Zunovo
* Ocrevus
* ocrilate (INN)
* ocriplasmin (INN)

#### oct
##### octa-octo

* octabenzone (INN)
* octacaine (INN)
* octafonium chloride (INN)
* Octagam
* octamoxin (INN)
* octamylamine (INN)
* octanoic acid (INN)
* octapinol (INN)
* octastine (INN)
* octatropine methylbromide (INN)
* octaverine (INN)
* octazamide (INN)
* octenidine (INN)
* octimibate (INN)
* Octocaine
* octocog alfa (INN)
* octocrilene (INN)
* octodrine (INN)
* octopamine (INN)
* octotiamine (INN)
* octoxinol (INN)

##### octr

* Octreoscan
* octreotide (INN)
* octriptyline (INN)
* octrizole (INN)

#### ocu

* Ocuclear
* Ocufen
* Ocuflox
* Ocumycin
* Ocupress
* Ocusert Pilo
* Ocusulf

### od-oj

* odanacatib (USAN)
* odronextamab (INN)
* odulimomab (INN)
* ofatumumab (INN)
* ofloxacin
* Ogestrel
* Ogivri
* oglufanide disodium (USAN)
* Ogsiveo
* Ohtuvayre
* Ojemda
* Ojjaara

### ol

* olaflur (INN)
* olanzapine (INN)
* olaquindox (INN)
* olaratumab (USAN)
* oleandomycin (INN)
* Oleptro
* oletimol (INN)
* olezarsen (USAN, INN)
* olivomycin (INN)
* olmesartan (USAN, INN)
* olmidine (INN)
* olodaterol (INN)
* olopatadine (INN)
* olpadronic acid (INN)
* olpimedone (INN)
* olprinone (INN)
* olradipine (INN)
* olsalazine (INN)
* oltipraz (INN)
* Olux
* olvanil (INN)

### om-on

* omacetaxine mepesuccinate (USAN)
* omadacycline (USAN, INN)
* omalizumab (INN)
* omalizumab-igec
* omapatrilat (INN)
* omecamtiv mecarbil (USAN, INN)
* omeprazole (INN)
* omidoline (INN)
* omidubicel (USAN, INN)
* omidubicel-onlv
* omiganan (USAN)
* omiloxetine (INN)
* Omisirge
* Omlyclo
* Omnaris
* Omnicef
* Omnipaque
* Omnipen
* Omniscan
* Omnitarg
* omoconazole (INN)
* omonasteine (INN)
* omtriptolide sodium (USAN)
* Omvoh
* Ona Mast
* onabotulinumtoxinA (USAN)
* onaclostox
* onamelatucel-L (USAN)
* Onapgo
* onapristone (INN)
* onasemnogene abeparvovec (USAN, INN)
* Oncaspar
* Oncovin
* ondansetron (INN)
* onercept (USAN)
* Onoact
* onrehi (INN)
* onsifocon A (USAN)
* Ontak
* ontazolast (INN)
* Ontruzant
* Onyda XR
* Onyu

### op

* opanixil (INN)
* Opcon
* Opdivo
* Opdivo Qvantig
* opebacan (INN)
* Ophthaine
* Ophthetic
* Ophthochlor
* Ophthocort
* Opill
* opiniazide (INN)
* opipramol (INN)
* opium
* opratonium iodide (INN)
* oprelvekin (INN)
* Opsynvi
* Opticrom
* Optimark
* Optimine
* Optipranolol
* Optison
* Optivar
* Optomycin
* Opuviz
* Opvee