Phenothiazine

Phenothiazines are antipsychotic drugs. There are three groups:

• I - Aliphatic compounds have a strong sedative effect, but moderate extrapyramidal and autonomic effects.
• II - Piperidines have moderate sedative effects and fewer extrapyramidal effects than aliphatic compounds, but more autonomic effects.
• III - Piperazines have few sedative effects, pronounced extrapyramidal effects, and less autonomic effects.