Drug Screening is not required to obtain a Medical Examiners Certificate.
DOT regulations 49CFR391-- Subpart E_Physical Qualifications and Examinations
When requested---
Drug Screening may be required by your employer or required by the nature of your commerical driving.
Drug and Alcohol screening is available in addition to the Medical Examination.
Drugs tested for include:
(a) Marijuana metabolites
(b) Cocaine metabolites
(c) Amphetamines
(d) Opiate metabolites
(e) Phencyclidine(PCP)
ALCOHOL SCREENING
In Addition to Drug Screening, your employer or driving may require an Alcohol Screening.
