<prompt> Most common agent associated with agranulocytosis is:SteroidsAlkylating agentsParacetamolEndotoxemia  <response>: Ans. b. Alkylating agentsRef: Harrison 19th eP 417Most common cause of agranulocytosis is iatrogenic, i.e. drug induced.Most common drugs causing agranulocytosis are anticancer drugs which inhibit cell cycle like alkylating agents and antimetabolites like methotrexate, 5-FU and 6-MP. 