Oxymetholone
Anadrol
Oxymorphone
Opana
Oxytocin
Pitocin, Syntocinon
Oxtriphylline (Choline theophyllinate)
Choledyl
Oxybutynin
Ditropan
Oxycodone
OxyContin, Roxicodone, Supeudol, Targin
Oxandrolone
Oxandrin
Oxaprozin
Daypro
Oxazepam
Serax
Oxcarbazepine
Trileptal