The AAFP concludes that the current evidence is insufficient to assess the balance of benefits and harms of screening adolescents, adults, and pregnant women for illicit drug use. (2008)
(Grade: I recommendation)
Grade Definition: http://www.uspreventiveservicestaskforce.org/uspstf/grades.htm
Clinical Considerations: http://www.uspreventiveservicestaskforce.org/uspstf/uspsdrug.htm