The top ten illegal drugs are 1. heroin, 2. cocaine, 3. methamphetamine, 4. crack cocaine, 5. LSD, 6. ecstasy, 7. opium, 8. marijuana, 9. psylocybin mushrooms, and 10. PCP. The order of this list varies from source to source, but the drugs remain the same. You can find more information here: http://listverse.com/2007/09/27/top-10-drugs-and-their-effects/
