Hi my mother has been taking Fosavance 70 for the last 3 years or so for low bone density, pain in waist etc. Slight case of osteoporosis was detected as well. However this medicine is not available any more in any store. Please suggest an alternative from your end. I will definitely consult our family doctor as well later but tell me your recommendation. How long should Fosavance be continued as a rul book? My mother is 64 year old.