- Ob Complete One
- Ob Complete Petite
- Ob Complete Premier
- Obizur
- Ocrevus
- Ocrevus Zunovo
- Octagam
- Ocuflox
- Odactra
- Odefsey
- Odomzo
- Ofev
- Ofloxacin
- Ogivri
- Ogsiveo
- Ohtuvayre
- Ojemda
- Ojjaara
- Olanzapine
- Olmesartan
- Olmesartan-amlodipine-hctz
- Olopatadine
- Olpruva
- Olumiant
- Olux
- Olux-e
- Omeclamox-pak
- Omega-3 Acid Ethyl Esters
- Omegaven
- Omeprazole
- Omeprazole-sodium Bicarbonate
- Omlonti
- Omnaris
- Omnipaque
- Omnitrope
- Omvoh
- Onapgo
- Oncaspar
- Ondansetron
- Onexton
- Onfi
- Ongentys
- Onivyde
- Onpattro
- Ontralfy
- Ontruzant
- Onureg
- Onyda Xr
- Opdivo
- Opdivo Qvantig
- Opdualag
- Opfolda
- Opipza
- Opsumit
- Opsynvi
- Opvee
- Opzelura
- Oracea
- Oralair
- Oralone
- Oravig
- Orbactiv
- Orencia
- Orfadin
- Orgovyx
- Oriahnn
- Orilissa
- Orkambi
- Orladeyo
- Orlistat
- Orlynvah
- Orphenadrine-aspirin-caffeine
- Orphengesic Forte
- Orquidea
- Orserdu
About medications starting with “O”
Page 1 of 2 covers entries 1–75 of 115 medications that begin with O. This section includes medicines for eye care, osteoporosis, overactive bladder, pain, and digestive conditions, with both generic and brand-name products represented.
Examples on this page include Ob Complete One, Ob Complete Petite, Ob Complete Premier, Obizur, and Orserdu. These examples help you locate a listing, but they are not a substitute for checking the medication’s individual details, approved use, warnings, or pharmacist instructions.
Use the price comparison as a starting point, then match the medication name, dosage form, strength, quantity, and ZIP code before choosing a pharmacy. A tablet, capsule, liquid, injector, or extended-release version can have a very different price even when the names look alike.
RxDiff makes it easier to compare pharmacy prices before you fill. Search the exact medication on this page, choose the prescribed dosage and quantity, and review participating pharmacies near you. For treatment or safety questions, rely on your prescriber or pharmacist rather than price information alone.
To continue browsing this O directory, use the numbered page links above or return to the A–Z medication index. The directory is organized by medication name rather than condition, so a nearby listing may be unrelated to your prescription. Follow the individual medication link to review its available forms and compare the exact product your clinician prescribed.