The safety of phenazopyridine is not established in infants or during breastfeeding. Because it can cause methemoglobinemia, sulfhemoglobinemia, and hemolytic anemia, it should be avoided while breastfeeding, especially with an infant under 1 month of age or with glucose-6-phosphate dehydrogenase (G6PD) deficiency.
非那吡啶在婴儿或哺乳期的安全性尚未确立。由于它可导致高铁血红蛋白血症、硫化血红蛋白血症和溶血性贫血，哺乳期应避免使用，尤其是对于1个月以下的婴儿或患有葡萄糖-6-磷酸脱氢酶（G6PD）缺乏症的婴儿。
