Typical pre-employment screenings would not consist of such kinds of substances. In general, the screening detects categories of:
2) Opiates (ok with prescription)
5) Benzodiazepines (ok with Rx)
6) Methamphetamines (including MDMA)
The most recent pre-employment screening I took - and passed - entailed the above listed categories. Interestingly enoough, even my legally prescribed Vicodin did NOT show up in the opiate category. Maybe Walgreen been giving me bunk Vikes?? lol. I'm sure you've nothing to worry about with T3 and Clen compounds, unless your source has laced them with something you're not aware of. Certain diet pills such as Phentermine can trigger a positive in the Amphetamine class.