<prompt> In osteoporosis, bone formation is increased by which drugBisphosphonatesEstrogenCalcitoninTeriparatide  <response>: Drug used in osteoporosisInhibit resorption: Bisphosphonates, denosumab, cinacalcet, calcitonin, estrogen, SERMS, gallium nitrateStimulate formation: teriparatide, calcium, calcitriol, fluoridesBoth actions: Strontium renelateRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 400 - 412 