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These drugs lower the white blood cell count to a greater degree than the counts of other blood cells â red blood cells and platelets â although these are commonly affected, too. Fortunately, the effect of these drugs on the white blood cell count is usually both predictable and short-lived. The white cell count generally falls below the normal range about seven to ten days after a chemotherapy treatment and recovers within about a week after that.
Normal white blood cell count is about 4.3 to 8.10. White blood cells can go down from many conditions and certain medications. The main purpose of WBCs is to fight infection â¦ so if they are decreased your body may not be able to fight off infections. Some cause include: 1. Viral infections 2. Congenital disorders 3.