Take calcium and vitamin D as directed by your doctor. (See also
How to Use section.) Your doctor will order calcium blood tests before your first injection and during treatment. Tell your doctor right away if you have any symptoms of low calcium such as: muscle spasms/cramps, mental/mood changes (such as irritability or confusion), numbness/tingling (especially around lips/mouth or in fingers/toes), fast/irregular heartbeat, severe dizziness/fainting, seizures...