If, during the review of a DOT-regulated test, the MRO becomes aware of a donor's medical situation posing a potential safety risk, the MRO will notify you by adding a printed remark on the Specimen Result Certificate. If the safety sensitive issue is due to a prescription medication the MRO will attempt to contact the prescribing physician directly to obtain a written statement on whether his/her patient can perform safety sensitive duties while taking the medication as prescribed.  If the safety sensitive issue requires a more comprehensive medical evaluation, the MRO will recommend a fitness for duty evaluation by a medical examiner.