title: Preoperative clonidine withdrawal syndrome.
mesh_terms: D000959:Antihypertensive Agents; D003000:Clonidine; D006801:Humans; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care; D013375:Substance Withdrawal Syndrome / Q000209:etiology*; D013577:Syndrome
chemical_list: D000959:Antihypertensive Agents; D003000:Clonidine