OAK
OASIS 1
OASIS 2
OASIS-5
OAT
OCEAN(a)-DOSE (olpasiran 10 mg)
OCEAN(a)-DOSE (olpasiran 225 mg every 12 weeks)
OCEAN(a)-DOSE (olpasiran 225 mg every 24 weeks)
OCEAN(a)-DOSE (olpasiran 75 mg)
OCEANIC-AF
OCTIVUS
OCTOBER
ODYSSEY
ODYSSEY OUTCOMES
Olanzapine for CINV Prophylaxis
OLV in Thoracic Anesthesia
OLYMPIA 1
OLYMPIA 2
OlympiAD
Omeprazole for peptic ulcer bleeding
ONCO PE
ONTARGET (telmisartan with ramipril)
ONTARGET (telmisartan)
ONWARDS 1
ONWARDS 3
OPPORTUNI-C
OPT-BIRISK
OPTIMAL
OPTIMAL-BP
OPTIMAS
OPTIMISE II
OPTIMUM (micro-US vs. MRI/US)
OPTION
OptiTHO
OPTPRESS
Oral Care Program for Postextubation Dysphagia
Oral GLP-1 (danuglipron 120 mg)
Oral GLP-1 (danuglipron 40 mg)
ORBITA
ORBITA-2
ORCA-2 (cytisinicline for 12 weeks)
ORCA-2 (cytisinicline for 6 weeks)
ORCA-3 (cytisinicline for 12 weeks)
ORCA-3 (cytisinicline for 6 weeks)
ORIENT-16
ORIGIN n-3 Fatty Acids
ORIGINAL
ORION-10
ORION-11
OSCILLATE
OT-PVCs
Ototopical ciprofloxacin and fluocinolone in AOE (ciprofloxacin plus fluocinolone vs. ciprofloxacin)
Ototopical ciprofloxacin and fluocinolone in AOE (ciprofloxacin plus fluocinolone vs. fluocinolone)
OUtMATCH
OVIVA
Oxy-PICU
Oxygen-ICU