| Completed | 4 | 246 | US | Serdexmethylphenidate (SDX) and dexmethylphenidate (d-MPH), placebo | Corium, Inc., Premier Research Group plc, Prometrika, LLC, Almac | Attention Deficit/Hyperactivity Disorder | 05/24 | 05/24 | | |
| Active, not recruiting | 4 | 123 | US | Serdexmethylphenidate (SDX) and dexmethylphenidate (d-MPH) | Corium, Inc., Premier Research Group plc, Prometrika, LLC, Almac, Worldwide Clinical Trials | Attention Deficit/Hyperactivity Disorder | 07/25 | 07/25 | | |