While using Betapace medicine, it is important to consider the following: May cause QT prolongation that affects the heart rhythm., QT prolongation may also be caused by low levels of potassium and magnesium., Avoid water pills, May cause hyperglycemia in diabetic patients, Not to be used by pregnant women, Not suitable for use by breastfeeding mothers as it passes through milk and may have negative effects on the nursing child., May cause dizziness, do not drive or operate machinery until fully alert., Avoid taking antacids with this drug as it may reduce absorption of the drug.