| Completed | 2 | 172 | Europe | Pioglitazone, ACTOS®, AD4833, Pioglitazone and ramipril, Ramipril | Takeda | Inflammation, Hypertension | 05/08 | 05/08 | | |
| Not yet recruiting | 2 | 20 | NA | Pioglitazone 30mg, Actos, Placebo, Labs, Diagnostic labs | Emory University, National Heart, Lung, and Blood Institute (NHLBI) | Pulmonary Hypertension, Pulmonary Hypertension Due to Lung Diseases | 02/28 | 02/28 | | |