ICD-10-CM
- Obidoxime chloride
- Octafonium (chloride)
- Octamethyl pyrophos-phoramide
- Octanoin
- Octatropine methyl-bromide
- Octotiamine
- Octoxinol (9)
- Octreotide
- Octyl nitrite
- Oestradiol
- Oestriol
- Oestrogen
- Oestrone
- Ofloxacin
- Oil (of)
- Oily preparation (for skin)
- Ointment NEC
- Olanzapine
- Oleander
- Oleandomycin
- Oleandrin
- Oleic acid
- Oleovitamin A
- Oleum ricini
- Olive oil (medicinal) NEC
- Olivomycin
- Olsalazine
- Omeprazole
- OMPA
- Oncovin
- Ondansetron
- Ophthaine
- Ophthetic
- Opiate NEC
- Opioid NEC
- Opipramol
- Opium alkaloids (total)
- Oracon
- Oragrafin
- Oral contraceptives
- Oral rehydration salts
- Orazamide
- Orciprenaline
- Organidin
- Organonitrate NEC
- Organophosphates
- Orimune
- Orinase
- Ormeloxifene
- Ornidazole
- Ornithine aspartate
- Ornoprostil
- Orphenadrine (hydrochloride)
- Ortal (sodium)
- Orthoboric acid
- Orthocaine
- Orthodichlorobenzene
- Ortho-Novum
- Orthotolidine (reagent)
- Osmic acid (liquid)
- Osmotic diuretics
- Otilonium bromide
- Otorhinolaryngological drug NEC
- Ouabain (e)
- Ovarian
- Ovral
- Ovulen
- Oxacillin
- Oxalic acid
- Oxamniquine
- Oxanamide
- Oxandrolone
- Oxantel
- Oxapium iodide
- Oxaprotiline
- Oxaprozin
- Oxatomide
- Oxazepam
- Oxazimedrine
- Oxazolam
- Oxazolidine derivatives
- Oxazolidinedione (derivative)
- Ox bile extract
- Oxcarbazepine
- Oxedrine
- Oxeladin (citrate)
- Oxendolone
- Oxetacaine
- Oxethazine
- Oxetorone
- Oxiconazole
- Oxidizing agent NEC
- Oxipurinol
- Oxitriptan
- Oxitropium bromide
- Oxodipine
- Oxolamine
- Oxolinic acid
- Oxomemazine
- Oxophenarsine
- Oxprenolol
- Oxsoralen
- Oxtriphylline
- Oxybate sodium
- Oxybuprocaine
- Oxybutynin
- Oxychlorosene
- Oxycodone
- Oxyfedrine
- Oxygen
- Oxylone
- Oxymesterone
- Oxymetazoline
- Oxymetholone
- Oxymorphone
- Oxypertine
- Oxyphenbutazone
- Oxyphencyclimine
- Oxyphenisatine
- Oxyphenonium bromide
- Oxypolygelatin
- Oxyquinoline (derivatives)
- Oxytetracycline
- Oxytocic drug NEC
- Oxytocin (synthetic)
- Ozone