|RBC values continue to go down
Aug 9, 1999
JB - There are a couple of questions that I have been unsuccessful at getting answers to. First some background: 1) Diagnosed positive Dec. 1998. CD4=302 VL=8925 2) Started Combivir and Sustiva on Feb 2, 1999. 3) Now VL undetectable and CD4=448 4) Blood drawn at same time (early morning) before eating. 5) Same lab has been used each time. 6) RBC has been dropping: 5.23, 5.14, 4.47, 3.88, 3.74. 7) Hemaglobin and Hematocritin normal ranges at about 15.7(hemaglobin) and 44 (hematocrit). 8) MCV has been rising from 92 to 120. 9) MCH has been rising from 32.2 to 41.4.
My questions are: 1) At what point should I start to be concerned about the dropping RBC and the rising MCV and MCH? and 2) Since this seems to be drug induced (the AZT in Combivir) would another drug in the same class be better? I would hate to change with the VL and CD4 numbers I've been having. But with feeling run down all the time it might be necessary.
Your opinion would be greatly appreciated.
Response from Mr. Molaghan
Hello Thank you for such a complete and succinct clinical history. You've raised several important points. AZT (which is contained in Combivir along with 3TC) has been well documented as causing a macrocytic anemia in some patients. This explains the elevated MCV. I find it curious that the red blood count is decreasing, but the hemoglobin and hematocrit levels are within normal limits. If these counts (hemoglobin and hematocrit) decrease along with the red blood count, you should intervene. There are a couple of options you could discuss with your medical provider, if you indeed have developed AZT induced anemia. You could change your antiretroviral regimen to a combination that is less likely to cause anemia (such as d4t, ddI), but these medicines are also not without side effect. The strongest argument against changing regimens is the fact that you've succesfully suppressed the virus and improved your CD4 count. Another option -if it is determined that you have AZT induce anemia- is treatment with Procrit (erythropoietin alfa). This medication is quite effective in improving anemia and the associated symptoms (fatigue, shortness of breath, headache, etc). In any case, the decreasing red blood cell count should be evaluated. Good luck.
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