a drug test and a drug screen are the same thing.

here's what they'll test for:
1. Marijuana
2. Cocaine
3. Amphetamines (includes adderall as well as meth)
4. MDMA (extacy)
5. Opiates (includes opium, heroin, morphine, oxycodine, and others)

They might also test for:
1. Barbiturates (Phenobarbital, Secobarbitol, Butalbital)
2. Hydrocodone (Lortab, Vicodin)
3. Methaqualone (Qualuudes)
4. Benzodiazepines (Valium, Xanax, Librium, Serax, Rohypnol)
5. Methadone
6. Propoxyphene (Darvon compounds)
7. Ethanol (Alcohol)

Safe drugs:
1. 2c-i
2. Salvia (DO NOT use as a weed substitute)
3. Acid (for the most part, it is out of your system very fast)