Would raloxifene be a better choice for secondary severe osteoporosis than strontium ranelate for a person with 1 kidney who had breast cancer?

No :): There is not a single paper published using the words strontium renalate and cancer in its title: http://www.Ncbi.Nlm.Nih.Gov/pubmed?Term=(strontium%20ranelate%5btitle%5d)%20and%20cancer%5btitle%5d i think you can be reassured that the breast cancer history is not an issue. You can ask your pharmacist about the kidney problem, but unless you are in renal failure, it should not be an issue.