This is a decision you and your doctor will make. Also tell your health care professional if you are allergic to any other substance, such as foods, preservatives, or dyes. Limited use of prazosin to control high blood pressure in pregnant women has not shown that prazosin causes birth defects or other problems. Studies in animals given many times the highest recommended human dose of prazosin also have not shown that prazosin causes birth defects. However, in rats given many times the highest recommended human dose, lower birth weights were seen.
Prazosin passes into breast milk in small amounts.
However, it has not been reported to cause problems in nursing babies. Studies on this medicine have been done only in adult patients, and there is no specific information comparing use of prazosin in children with use in other age groups. In addition, prazosin may reduce tolerance to cold temperatures in elderly patients. Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary.