Isosorbie dinitrate/hydralazine is a fixed dose combination drug treatment specifically indicated for African Americans with congestive heart failure. It is a combination of hydralazine (an antihypertensive) and isosorbide dinitrate (a vasodilator). It is the first race-based prescription drug in the United States. The combination preparation is marketed in the United States by Nitromed under the trade name BiDil.