Gemcal kit 7?which contains calcium, calcitriol, and alendronate?is prescribed to strengthen your bones. Because bone thinning has no obvious symptoms, feeling well means the medication is working, but your bones still need continuous support to stay strong. It is safe for long-term use under medical supervision. However, you should not stop taking it without consulting your doctor first. They will evaluate your bone health, often using a bone density scan, to safely determine how long you need to continue this therapy.