or
ora-orb
- Ora-Testryl
- Orabase HCA
- Oracea
- Oracort
- Oragrafin
- Oralone
- Oramorph SR
- Orap
- Orapred
- Oraqix
- Orasone
- Oratane (Douglas Pharmaceuticals). Redirects to isotretinoin.
- orazamide (INN)
- orazipone (INN)
- orbifloxacin (INN)
- orbofiban (INN)
- orbutopril (INN)
orc-orm
- orciprenaline (INN)
- orconazole (INN)
- odronextamab (INN)
- Ordspono
- oregovomab (INN)
- orestrate (INN)
- Oretic
- Oreticyl
- Oreton Methyl
- Orfadin
- orforglipron (USAN, INN)
- Orgaran
- Orgatrax
- orgotein (INN)
- orientiparcin (INN)
- Orinase
- Orlaam
- Orlex
- orlistat (INN)
- Orlynvah
- ormaplatin (INN)
- ormeloxifene (INN)
- ormetoprim (INN)
orn-orv
- Ornade
- ornidazole (INN)
- Ornidyl
- ornipressin (INN)
- ornithine (INN)
- ornoprostil (INN)
- orotic acid (INN)
- orotirelin (INN)
- orpanoxin (INN)
- orphenadrine (INN)
- Orphengesic
- Orserdu
- ortetamine (INN)
- Ortho Cyclen
- Ortho Evra
- Ortho Tri-Cyclen
- Ortho-Cept
- Ortho-Est
- Ortho-Novum
- Orthoclone OKT3
- Orudis
- Oruvail
- orvepitant (USAN)
os-ov
- osalmid (INN)
- osanetant (INN)
- osaterone (INN)
- osaterone acetate (JAN)
- Osenvelt
- Oshih
- osimertinib (USAN, INN)
- osmadizone (INN)
- Osmitrol
- Osmovist
- ospemifene (USAN)
- Ospomyv
- Osteolite
- Osteoscan
- ostreogrycin (INN)
- osutidine (INN)
- Osvyrti
- otelixizumab (USAN)
- otenabant (USAN)
- otenzepad (INN)
- Oticair
- otilonium bromide (INN)
- otimerate sodium (INN)
- Otobione
- Otobiotic
- Otocort
- Otulfi
- OvaRex
- Ovcon
- ovemotide (USAN)
- Ovide
- Ovidrel
- Ovral
- Ovrette
- Ovulen