In human body aldrin is quickly changed to dieldrin, which can be measured in blood, urine, and body tissues if the organism has been exposed to a large amount. Special equipment is needed to measure aldrin or dieldrin in such bodily tissues or fluids thats why they are not usually available at a doctor's office. However, a sample taken in the doctor's office can be properly packed and shipped to a special laboratory, if necessary. Because aldrin changes to dieldrin fairly quickly in the body, these methods are useful for finding aldrin only within a few days after exposure to aldrin. Since dieldrin can stay in the body for months, measurements of dieldrin can be made for much longer after organism has been exposed to either aldrin or dieldrin. The test results cannot be used to predict if exposure to aldrin will have any adverse health effects. Exposure to other chemicals at the same time as exposure to aldrin and/or dieldrin could cause some confusion in understanding test results for aldrin and/or dieldrin.