Hi welcome to the health care magic According to your history you are having low bone density so that you can have osteoporosis like condition.... For that you have been prescribed correct drug that is alendronate which will reduce odteoclastic bone resorption and so that will improve bone density Check your calcium level also if low than cholecalciferol sachet can be Prescribed which can be taken once in week with milk.... Regular follow up needed If needed for osteoporosis raloxifene like Hormonal drug might added Take healthy and balanced diet Exercise will be beneficial Alendronate can cause gastritis like side effect Consult orthopedic surgeon for examination and accordingly management plan Take care