You should not use  hydralazine if you have coronary artery disease, or rheumatic heart disease affecting the mitral valve.
Before taking this medicine
You should not use hydralazine if you are allergic to it, or if you have:
coronary artery disease; or
rheumatic heart disease affecting the mitral valve.
To make sure hydralazine is safe for you, tell your doctor if you have ever had:
kidney disease;
systemic lupus erythematosus;
angina (chest pain); or
a stroke.
It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
Hydralazine can pass into breast milk, but effects on the nursing baby are not known. Tell your doctor if you are breast-feeding.
Hydralazine is not approved for use by anyone younger than 18 years old.
