MDMA, also called Molly or Ecstasy, is a lab-made (synthetic) drug that has effects similar to stimulants like methamphetamine, although some researchers and organizations consider MDMA to be a psychedelic drug because it can also mildly alter visual and time perception.
Amphetamine is a powerful central nervous system stimulant drug, chemically known as 1-phenylpropan-2-amine, used medically for conditions like ADHD, narcolepsy, and binge eating disorder (as lisdexamfetamine), but also carries abuse potential due to its effects on mood and alertness, with varied forms like methamphetamine and MDMA being well-known relatives, all impacting dopamine and norepinephrine systems.