title: Extended-release niacin or ezetimibe and carotid intima-media thickness.
abstract: BACKGROUND
  Treatment added to statin monotherapy to further modify the lipid profile may include combination therapy to either raise the high-density lipoprotein (HDL) cholesterol level or further lower the low-density lipoprotein (LDL) cholesterol level.
  
  
  METHODS
  We enrolled patients who had coronary heart disease or a coronary heart disease risk equivalent, who were receiving long-term statin therapy, and in whom an LDL cholesterol level under 100 mg per deciliter (2.6 mmol per liter) and an HDL cholesterol level under 50 mg per deciliter for men or 55 mg per deciliter for women (1.3 or 1.4 mmol per liter, respectively) had been achieved. The patients were randomly assigned to receive extended-release niacin (target dose, 2000 mg per day) or ezetimibe (10 mg per day). The primary end point was the between-group difference in the change from baseline in the mean common carotid intima-media thickness after 14 months. The trial was terminated early, on the basis of efficacy, according to a prespecified analysis conducted after 208 patients had completed the trial.
  
  
  RESULTS
  The mean HDL cholesterol level in the niacin group increased by 18.4% over the 14-month study period, to 50 mg per deciliter (P < 0.001), and the mean LDL cholesterol level in the ezetimibe group decreased by 19.2%, to 66 mg per deciliter (1.7 mmol per liter) (P < 0.001). Niacin therapy significantly reduced LDL cholesterol and triglyceride levels; ezetimibe reduced the HDL cholesterol and triglyceride levels. As compared with ezetimibe, niacin had greater efficacy regarding the change in mean carotid intima-media thickness over 14 months (P = 0.003), leading to significant reduction of both mean (P = 0.001) and maximal carotid intima-media thickness (P < or = 0.001 for all comparisons). Paradoxically, greater reductions in the LDL cholesterol level in association with ezetimibe were significantly associated with an increase in the carotid intima-media thickness (R = -0.31, P < 0.001). The incidence of major cardiovascular events was lower in the niacin group than in the ezetimibe group (1% vs. 5%, P = 0.04 by the chi-square test).
  
  
  CONCLUSIONS
  This comparative-effectiveness trial shows that the use of extended-release niacin causes a significant regression of carotid intima-media thickness when combined with a statin and that niacin is superior to ezetimibe. (ClinicalTrials.gov number, NCT00397657.)
authors.affiliation: Cardiology Service, Walter Reed Army Medical Center, Washington, DC, USA. allen.taylor@medstar.net
authors.forename: Allen J
authors.initials: AJ
authors.lastname: Taylor
authors.forename: Todd C
authors.initials: TC
authors.lastname: Villines
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Stanek
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Devine
authors.forename: Len
authors.initials: L
authors.lastname: Griffen
authors.forename: Michael
authors.initials: M
authors.lastname: Miller
authors.forename: Neil J
authors.initials: NJ
authors.lastname: Weissman
authors.forename: Mark
authors.initials: M
authors.lastname: Turco
mesh_terms: D000368:Aged; D000924:Anticholesteremic Agents / Q000494:pharmacology / Q000627:therapeutic use*; D001384:Azetidines / Q000494:pharmacology / Q000627:therapeutic use*; D002339:Carotid Arteries / Q000000981:diagnostic imaging / Q000187:drug effects* / Q000473:pathology; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D003327:Coronary Disease / Q000188:drug therapy* / Q000473:pathology; D003692:Delayed-Action Preparations; D004359:Drug Therapy, Combination; D000069438:Ezetimibe; D005260:Female; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000627:therapeutic use; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009525:Niacin / Q000494:pharmacology / Q000627:therapeutic use*; D012307:Risk Factors; D016037:Single-Blind Method; D014280:Triglycerides / Q000097:blood; D017539:Tunica Intima / Q000187:drug effects / Q000473:pathology; D017540:Tunica Media / Q000187:drug effects / Q000473:pathology; D014463:Ultrasonography
chemical_list: D000924:Anticholesteremic Agents; D001384:Azetidines; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D003692:Delayed-Action Preparations; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D014280:Triglycerides; D009525:Niacin; D000069438:Ezetimibe