title: Variability in plasma lipoprotein profiles when comparing diltiazem and propranolol.
abstract: OBJECTIVE
  To examine the effects of diltiazem and propranolol on plasma lipoproteins in a double-blind, comparative trial.
  
  
  METHODS
  Twenty-one mild-to-moderate hypertensive patients.
  
  
  METHODS
  Following discontinuation of previous antihypertensive treatments, and a 4-week, single-blind, placebo run-in, subjects were randomized to receive sustained-release diltiazem or propranolol. Total cholesterol, high-density lipoproteins (HDL), low-density lipoproteins (LDL), and very-low-density lipoproteins (VLDL) were measured during placebo administration and after 12-16 weeks of treatment.
  
  
  RESULTS
  No significant changes in plasma lipoprotein concentrations were noted in either the diltiazem or propranolol group compared with baseline values or each other. Marked variation in HDL, LDL, and VLDL were noted following drug treatment and in eight subjects whose lipoprotein concentrations were remeasured prior to drug treatment during the placebo period. The alterations were bidirectional, and similar in magnitude to those found following drug treatment.
  
  
  CONCLUSIONS
  In many cases, changes in plasma lipoproteins reported to be a consequence of antihypertensive treatment may merely reflect normal intrapatient variability.
authors.affiliation: College of Pharmacy, University of Connecticut, Farmington.
authors.forename: D G
authors.initials: DG
authors.lastname: Labreche
authors.forename: G T
authors.initials: GT
authors.lastname: Kondos
authors.forename: D W
authors.initials: DW
authors.lastname: Bartels
authors.forename: J L
authors.initials: JL
authors.lastname: Bauman
mesh_terms: D000328:Adult; D003692:Delayed-Action Preparations; D004110:Diltiazem / Q000494:pharmacology*; D004311:Double-Blind Method; D006801:Humans; D006973:Hypertension / Q000097:blood; D008075:Lipoproteins, HDL / Q000097:blood* / Q000187:drug effects; D008077:Lipoproteins, LDL / Q000097:blood* / Q000187:drug effects; D008079:Lipoproteins, VLDL / Q000097:blood* / Q000187:drug effects; D008297:Male; D008875:Middle Aged; D011433:Propranolol / Q000494:pharmacology*
chemical_list: D003692:Delayed-Action Preparations; D008075:Lipoproteins, HDL; D008077:Lipoproteins, LDL; D008079:Lipoproteins, VLDL; D011433:Propranolol; D004110:Diltiazem