I don't know anything about it but I found this..
Abnormal Eosinophil Levels
Eosinophelia is the term used to describe abnormally high absolute eosinophil levels. Intestinal parasitic infections, such as those caused by roundworms or tapeworms, certain types of leukemia, autoimmune conditions, such as lupus, allergies, and asthma are conditions associated with high absolute eosinophil levels. According to the National Institutes of Health, medications such as amphetamines, laxatives containing psyllium, certain antibiotics, interferon, and tranquilizers can cause eosinophelia.
They also claim that lower than normal absolute eosinophil levels may result from alcohol intoxication and the presence of too much cortisol (a hormone produced by the adrenal glands) in the body.