I took Toprol XL 50 mg while I was pregnant. I was having syncope with heartrate going up to 180's. I wore a 24 holter monitor, was in the hospital several times during pregnancy and this continued until he was born. After he was born he had low blood sugar, he couldn't hold his body temperature, he was having trouble breathing and he failed his newborn hearing test both times. He has been in and out of every dr's office known to man. He also attends speech and occupational therapy at this point due to a seizure disorder. My concern is.... Is there a link between the medicine and his medical problems? My other child is completely fine, I didn't have any problems while pregnant and took no medicine at all.