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Alendronate Treatment of Established Primary Osteoporosis in Men: Results of a 2-Year Prospective Study

Medizinische Klinik 4, Klinikum Leverkusen, Akademisches Lehrkrankenhaus der Universität zu Köln, 51375 Leverkusen Germany

Address all correspondence and requests for reprints to: Prof. Dr. Johann D. Ringe, Medizinische Klinik 4, Klinikum Leverkusen, Akademisches Lehrkrankenhaus der Universität zu Köln, 51375 Leverkusen Germany.

Abstract

Men with osteoporosis have been neglected in the past, and only a few therapeutic trials have been performed in men. The bisphosphonate, alendronate, has been widely used for the treatment of postmenopausal osteoporosis. This prospective, open label, active controlled, randomized clinical study compared the effects of oral alendronate (10 mg daily) and alfacalcidol (1 µg daily) on bone mineral density (BMD), safety, and tolerability in 134 males with primary established osteoporosis. All men received supplemental calcium (500 mg daily). After 2 yr, alfacalcidol-treated patients showed a mean 2.8% increase in lumbar spine BMD (P < 0.01) compared with a mean increase of 10.1% in men receiving alendronate (P < 0.001). The corresponding changes in femoral neck BMD were +2.2% and +5.2% for the alfacalcidol and alendronate groups, respectively (P = 0.009). The incidence rates of patients with new vertebral fractures were 18.2% and 7.4% for the alfacalcidol and alendronate groups, respectively (P = 0.071). Both therapies were well tolerated.

Thus, alendronate produced favorable effects on BMD consistent with the results from another study in male osteoporosis. The average increase rates were higher than with alfacalcidol. Alendronate may be superior to alfacalcidol in the treatment of men with established primary osteoporosis.

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