- O-Plat
- Oceral
- Ocitocina Blau
- Ocrevus
- Octagam
- Octalbin
- Octanine F
- Octaplex
- Octavi SDOptimum
- Octifen
- Octride
- Ocubin
- Ocubin
- Ocufen
- Ocupress
- Ocutil
- Ocylin
- Oestrogel
- Ofev
- Oflox
- Ofloxacino EMS
- Ofloxacino Germed Pharma
- Ofloxacino Legrand
- Ofloxacino LFM
- Ofolato
- Ofolato D
- Ofolato D Fer
- Ofolato Fer
- Ofolato G
- Ofolato Sop
- Ofoliflex
- Oftalmox
- Oftpred
- Ogestan Blues
- Ogestan Gold
- Ogestan Plus
- Ogestan Pré
- Ohde
- Ohde Caps
- Okótico