 4. Undergoing treatment with any of the following drugs within the last 12 months i adrenocorticoid steroids 3 months or longer at anytime or 10 days of treatment within the previous 12 months ii anticonvulsant therapy iii pharmacological doses of thyroid hormone causing decline of TSH below normal iv bisphosphonates v calcitonin vi synthetic parathyroid hormone vii selective estrogen receptor modulators viii strontium ranelate ix estrogen therapy x chemotherapeutic agents xi sodium fluoride any history of treatment with fluoride xii medications known to affect calcium metabolism diuretics, antacids, calcium channel blockers etc.. 