title: Management of refractory CHF with prazosin: importance of tolerance and tachyphylaxis.
mesh_terms: D000284:Administration, Oral; D004361:Drug Tolerance; D004452:Echocardiography; D006333:Heart Failure / Q000188:drug therapy*; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D009200:Myocardial Contraction / Q000187:drug effects; D005082:Physical Exertion; D011224:Prazosin / Q000627:therapeutic use*; D011799:Quinazolines / Q000627:therapeutic use*; D013618:Tachyphylaxis
chemical_list: D011799:Quinazolines; D011224:Prazosin