Amphetamines are stimulant medications that are commonly used to treat attention-deficit hyperactivity disorder (ADHD), and sometimes to treat narcolepsy or obesity. You’ve likely come into contact with them before – if names like Adderall, Ritalin, Concerta or Dexedrine ring a bell, it’s because their use...

Barbiturates were introduced in 1903 and classified within a group of drugs known as sedative‐hypnotics. They act as a central nervous system depressant by slowing the activity of the gamma-aminobutyric acid (GABA) in the brain, a neurotransmitter that nerves use as a communication channel. Barbiturates...