<prompt> In osteoporosis, bone formation is increased by which drug-BisphosphonatesEstrogenCalcitoninTeriparatide  <response>: Ans. is d i.e., TeriparatideDrug used in osteoporosisInhibit resorption Bisphosphonates, donesumab, cinacalcet, calcitonin, estrogen, SERMS, gallium nitrate.Stimulate formation .-Teriparatide, calcium, calcitriol, fluorides.Both actions:- Strontium renelate. 