Hello, I am new here with progressively declining platelet counts. I have been graphing my numbers since 2018. The decline is co-incident with my starting Prolia. In September of 2023 I requested to be switched to something else after finding studies listing a 20 % incidence of low platelets with that therapy.
The alternative was Alendronate (generic for Fosamax). I did lots of looking back then and it appeared to be a good choice (I didn't know about PDSA.org at that time). Of course now I have found numerous peer-reviewed studies about bisphosphonates and thrombocytopenia. Unfortunately I took Fosamax for 7 months... Now scheduled for a bone marrow biopsy the end of this month.
I don't want to discourage anyone from this class of drugs, but since this thread and the PDSA.org site does not have any references I am pasting what I have found so far (searching has been difficult due to different spellings) The last journal article states >10% incidence in its undesirable effects section:
Scholarly Articles Associating Bisphosphonates with Thrombocytopenia
(first article title has different spelling for Thrombocytopenia)
Kulkarni P, Cushman T, Donthireddy V, Rao S. Spontaneously recovered severe thrombocytopaenia following zoledronic acid infusion for osteoporosis. BMJ Case Rep. 2016 Feb 3;2016:bcr2015213786. doi: 10.1136/bcr-2015-213786. PMID: 26843222; PMCID: PMC4746530. Retrieved 6 May, 2024 from NIH.gov Website:
www.ncbi.nlm.nih.gov/pmc/articles/PMC4746530/
Ferretti G, Petti MC, Carlini P et al.. Zoledronic acid-associated thrombotic thrombocytopenic purpura. Ann Oncol 2004;15:1847–8. 10.1093/annonc/mdh478 Retrieved 6 May, 2024 from NIH.gov Website:
pubmed.ncbi.nlm.nih.gov/15550592/
Bhadada SK, Bhansali A, Das S et al.. Thrombotic thrombocytopenic purpura following zoledronic acid infusion with a fatal outcome. BMJ Case Rep 2009;2009:pii: bcr09.2008.0923 Retrieved 6 May, 2024 from NIH.gov Website:
www.ncbi.nlm.nih.gov/pmc/articles/PMC3029861/
Toller, Claire, S. Charlesworth, Sarah, Mihalyo, Mary, Howard, Paul, Wilcock, Andrew (2019, May) Bisphosphonates, Therapeutic Reviews, Volume 57, ISSUE 5, P1018-1030, May 2019 Retrieved 9, May, 2024 from JPSM Website:
www.jpsmjournal.com/article/S0885-3924(19)30050-8/fulltext
Kind Regards,
Ken / Salisbury, NC USA