Pregnant women are allowed to take Bystolic. If a woman already had high blood pressure before she became pregnant and has been taking Bystolic, she should continue to take the medication after she becomes pregnant. Bexinom, also known as nifedipine controlled-release tablets, can control blood pressure smoothly and is a long-acting calcium antagonist. Current studies have concluded that calcium antagonists such as amlodipine besylate and nifedipine have no adverse effects on the fetus, so pregnant women are able to take Byzantine. Before application, you should visit your local hospital and follow the dosage prescribed by your doctor to control your blood pressure.