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Why do I need a blood test before chemotherapy?

You'll need a blood test before chemotherapy to count the number of blood cells in your blood. If your blood counts are too low, you might have to wait a bit longer for your next session of chemotherapy. You might also need a transfusion of red blood cells or platelets. Not enough red blood cells and platelets means your energy level is down, and not enough white blood cells means you can’t fight off infections. If your blood counts are high enough, and you’re feeling well, you can go ahead with your chemotherapy session.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.