Opiates, benzodiazepines, amphetamines, barbiturates, phencyclidine are the 5 major classes on the vast majority of drug tests. Of course, many employers will also test for cannabis and cotinine...
Depends on the drug test. If it's a sports-related test, you can probably find out what drugs they are looking for. If it's an employment test, either as pre-employment or continuing employment, this...