Valium causes a similar change in the brain's reward-inducing dopamine cells as a dose of alcohol, morphine, amphetamine or cocaine.
Methamphetamine is used recreationally and illicitly among college students, truck drivers and athletes in the U.S. for the increased energy and alertness that the drug produces.
Regular abuse of inhalants can result in serious harm to vital organs, including the brain, heart, kidneys, and liver.
Typical symptoms of opiate or synthetic opioid withdrawal include restlessness, muscle and bone pain, insomnia, diarrhea, vomiting, cold flashes with goose bumps ("cold turkey"), and leg movements.