An employee took Asenlix??, a diet pill prescribed for him while he was visiting family in Mexico. He then tested positive for amphetamines, 93% d isomer. I was the Medical Review Officer (MRO) who reviewed the result and found that information about Asenlix was difficult to obtain. For example, the Physician's Desk Reference does not list it. Apparently Asenlix contains clobenzorex, which can metabolize to amphetamine. How can an MRO find information on foreign drugs that contain or metabolize to amphetamines?