<prompt> Treatment of postmenopausal osteoporosis -a Tamoxifenb Progesterone c Estrogend Alendronatee Calcitoninabdacdbdecde  <response>: Drug used in osteoporosisInhibit resorption : -Bisphosphonates, donesumab, cinacalcet, calcitonin, estrogen, SERMS, gallium nitrate.Stimulate formation : -Teriparatide, calcium, calcitriol, fluorides,.Both actions : - Strontium renelate.Drugs decreasing bone resorption initially increase bone mineral density BMD, but it reaches a plateau in 2-3 yrs because bone formation also decreases.On the other hand, drugs promoting bone formation can increase BMD through the period of treatment.SERMs selective estrogen receptor modifier used for osteoporosis Raloxifene.Bisphosphonates Etidronate, Pamidronate, Alendronate, Ibandronate, Risedronate, Zolendronate. 