Changes in bone turnover markers after teriparatide administration to men with osteoporosis. Bone formation markers increase before bone resorption markers after men are exposed to teriparatide. Bone ALP, bone alkaline phosphatase; PICP, procollagen I carboxy-terminal; NTX/CR, urinary N-telopeptide/creatinine ratio; fDPD/CR, free deoxypyridinoline/creatinine ratio; TPTD20, teriparatide 20 μg; TPTD40, teriparatide 40 μg. From Orwoll et al. [11].
