Sentence:  Specific differences exist in the action of different drugs belonging to the same group as , for instance , between <WSD>reserpine</WSD> and chlorpromazine . 
Meaning of the word marked with <WSD> tags:  antihypertensive consisting of an alkaloid extracted from the plant Rauwolfia serpentina (trade names Raudixin or Rau-Sed or Sandril or Serpasil)