Standard drug tests, which primarily check for common compounds like THC, cocaine, opiates, and amphetamines, frequently do not detect modafinil, also known as modalert 200.  Regular employment and legal drug tests often do not target modafinil because it is not a restricted substance in many countries.  However, modafinil and its metabolites can be found using specialised tests like GC-MS or LC-MS/MS.  These tests are more common in legal investigations or competitive sports where performance-enhancing substances are tracked. Buy modalert 200, which usage should be disclosed if a thorough test is anticipated, even if it is unlikely to provide a positive result in most cases.