Research indicates that, like cocaine and other abused drugs, opiates activate the brain's reward system causing pain relief, a sense of euphoria and pleasure.
Opana may impair the user's mental and physical performance.
Students who use Adderall non-medically also commonly take central nervous system depressants such as pain relievers or tranquilizers, which puts them at even higher risk of dependence or abuse, to counteract the stimulant effects of the drug.
The THC in hashish that an individual will need to consume to feel high is about 10 milligrams, of which only a small part eventually reaches the brain.