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  • Title: Effects of dichloromethylene diphosphonate in women with breast carcinoma metastatic to the skeleton.
    Author: Siris ES, Hyman GA, Canfield RE.
    Journal: Am J Med; 1983 Mar; 74(3):401-6. PubMed ID: 6219577.
    Abstract:
    Ten women with skeletal metastases from breast carcinoma received dichloromethylene diphosphonate (Cl2MDP), an inhibitor of osteoclast function, in a placebo-controlled, double-blind, crossover study. Eight of these patients had either hypercalcemia or hypercalciuria, and all 10 had elevated urinary hydroxyproline levels as evidence of active skeletal disease. Eight patients had moderate to severe bone pain. After eight weeks of oral dichloromethylene diphosphonate treatment (3,200 mg per day), either preceded by or followed by an eight-week placebo period, seven of eight patients with hypercalciuria had significant reductions in urinary calcium levels, and nine of 10 had reductions in urinary hydroxyproline levels (significant in eight) when the dichloromethylene diphosphonate treatment periods were compared with prestudy or placebo periods. Additionally, seven of eight subjects had decreased pain with dichloromethylene diphosphonate. There were no adverse effects other than transient diarrhea in some patients. We conclude that oral dichloromethylene diphosphonate can significantly inhibit osteoclast-mediated bone destruction in patients with bone metastases from breast cancer.
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