Benzodiazepines include tranquilizers such as diazepam (Valium), alprazolam (Xanax), oxazepam (Serax), lorazepam (Ativan
), clonazepam (Klonopin) and
• Central nervous system stimulants. This class of drugs includes amphetamines, methamphetamine, cocaine and methylphenidate (Ritalin).
• Designer drugs. Synthetic compounds, such as Ecstasy, which has both amphetamine-like and hallucinogenic effects, are included in this category.