There could be several reasons why your doctor has put you on Prednisone. One could be so that the Prednisone can increase your white blood cell count. Also, Prednisone is useful for it's anti-inflammatory and immune suppression properties.
A WBC (white blood cell) count measures the number of white blood cells in a sample of blood. It is a valuable diagnostic tool for a number of diseases, like Lupus, and it is usually ordered as part of a complete blood count. The test is normally performed to detect an infection or inflammation.
White blood cells help fight infections. They are also called leukocytes. There are five major types of white blood cells: Basophils, Eosinophils,
Lymphocytes (T cells and B cells), Monocytes, and Neutrophils. The test is performed to find out how many white blood cells you have. Your body produces more white blood cells when you have an infection or allergic reaction -- even when you are under general stress. A normal white blood cell count ranges from 4,500 to 10,000 cells/mcl (cells per microliter) of blood.
Abnormally low numbers of white blood cells (called leukopenia)may be caused by: bone marrow failure, a bone marrow tumor,
a substance in the body that is toxic to these cells, collagen-vascular diseases, such as rheumatoid arthritis or Systemic Lupus Erythematosus, liver disease, spleen disease, radiation.
Abnormally high numbers of white blood cells (called leukocytosis) may be caused by: allergy, emotional or physical stress, infectious diseases, inflammatory diseases, leukemia, tissue damage.
Drugs that may increase WBC counts include: Allopurinol, Aspirin, chloroform, Corticosteroids (such as Prednisone), Epinephrine, Heparin,
Quinine (such as Plaquenil), and Triamterene.
Drugs that may lower your WBC count include: Antibiotics, Anticonvulsants, Antihistamines, Antithyroid drugs, Arsenicals, Barbiturates, Chemotherapy drugs, Diuretics, and Sulfonamides.
I hope that I've answered your question.
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