Once approved, they are placed into a pool of prospective research subjects. A computer maintains this pool to help fulfill the needs of various studies. Subjects are not paid for their screening evaluation. Prior to participation in any study, each subject is again given a limited screening examination which also includes drug screening. This is done to assure the volunteer's health status and appropriateness for participation in the study.
Studies are generally short in duration and are conducted throughout the year.
Drug Screening New and highly sensitive equipment is used to detect even traces of illegal drugs. For example, the equipment detects marijuana smoking residue for up to 36 days. It is our policy to exclude anyone who tests positive for drugs for six months. If you test positive for a second time, you will be permanently excluded. In addition you may be tested at any time during a study for the presence of illegal drugs.