Which of the following neurotransmitters is thought to play a role in schizophrenia?

A) Dopamine
B) Norepinephrine
C) Epinephrine
D) Acetylcholine

Dopamine is the neurotransmitter that is widely believed to be involved in schizophrenia. This hypothesis is supported by the efficacy of antipsychotic medication that blocks dopamine receptors in the brain. Additionally, some studies have reported higher levels of dopamine in the brains of people with schizophrenia, and drugs that increase dopamine activity (such as amphetamines) can produce psychosis-like symptoms.