Before you start taking Katerzia, inform your doctor:, Of any allergies you have, Of all the medications you take, including prescription and over-the-counter, Of any health conditions you have, If you are pregnant or have plans to become pregnant, If you are breastfeeding or have plans to breastfeed, Katerzia can cause low blood pressure., Katerzia can worsen chest pain and can cause an acute heart attack can occur after starting or increasing the dose of Katerzia, especially in patients who have severe obstructive coronary artery disease, Katerzia should be stored in the refrigerator. Do not freeze. Of any allergies you have, Of all the medications you take, including prescription and over-the-counter, Of any health conditions you have, If you are pregnant or have plans to become pregnant, If you are breastfeeding or have plans to breastfeed