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Phenothiazines are
antipsychotic drugs. There are three groups:
- I - Aliphatic compounds with a strong sedative effect, but moderate extrapyramidal and autonomic effects
- II - Piperidines have moderate sedative effects, fewer extrapyramidal effects than aliphatic compunds but more autonomic effects.
- III - Piperazines - few sedative effects, pronounced extrapyramidal effects but less autonomic effects.
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