This chapter of the manual provides a brief overview of the basic requirements of Title I of the ADA. Following chapters look at these and other requirements in more detail and illustrate how they apply to specific employment practices.
It is not a violation of the ADA for employers to use drug tests to find out if applicants or employees are currently illegally using drugs. Tests for illegal use of drugs are not subject to the ADA's restrictions on medical examinations. Employers may hold illegal users of drugs and alcoholics to the same performance and conduct standards as other employees. (See Chapter VIII .)