- Opadoph Brand
- Opalmon Brand
- Opaz Brand
- Opdivo Brand
- Operium Brand
- Ophan Brand
- Ophthalin Brand
- Ophthetic Brand
- Opipramol Generic
- Opplin Brand
- Opramed Brand
- Oprazole Atlantic Brand
- Opredsone Brand
- Oprelvekin Generic
- Opsar Tears Brand
- Opsartimol Brand
- Opsil Brand
- Opsil Tears Brand
- Opsil-A Brand
- Opsumit Brand
- Optal Brand
- Optal Olan's Eye Lotion Brand
- Optal-Pro Brand
- Optal-Tears Brand
- Optamin Brand
- Optic Brand
- Opticide Brand
- Opticrom Brand
- Optima Brand
- Optimark Brand
- Optiray Brand
- Optive Advanced Brand
- Optive Fusion/Optive Fusion UD Brand
- Optive Gel Drops Brand
- Optive/Optive UD Brand
- Optivit Brand
- Optosol Brand
- Optrex Brand
- Opvero Brand