9781422273869

Headache medications will reduce pain without causing any change in consciousness.

WORDS TO UNDERSTAND

dissociative: describes something that causes a feeling of separateness endorphins: a type of hormone made by the brain and nervous system neurotransmitters: chemical substances in the brain placebo: a medication that has no physical effect but that the user believes has an effect psychedelic: here, a category of drug that causes hallucinations psychoactive: describes something that has an effect on the brain and thought psychosis: a mental disorder in which the person loses touch with reality

8