Long-term effectiveness of extended-release nitrate for the treatment of systolic hypertension

Gordon S. Stokes, Alexandra J. Bune, Natasha Huon, Edward S Barin

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Isosorbide mononitrate (ISMN) is effective in the short-term for decreasing systolic blood pressure, pulse pressure, and pulse wave reflection in patients with systolic hypertension. To determine whether tolerance negates the efficacy of this nitrate in the long-term, a placebo-controlled study was performed in which ISMN was withdrawn briefly in a group of patients (n=16) who had received extended-release ISMN 60 to 120 mg once daily for 16 to 109 months. Blood pressure and wave reflection were determined by 24-hour ambulatory recorder and tonometer, respectively. During a 4-hour delay of the regular morning dose of ISMN, mean systolic blood pressure was higher than with the regular ISMN dosing schedule (P<0.0001). The maximum placebo-active difference was 16+/-4 mm Hg. The corresponding difference in augmentation index (a measure of pulse wave reflection) corrected for heart rate was 25+/-4% (P<0.001). The difference in pulse pressure was 13+/-3 mm Hg (P<0.001). There was no significant difference in diastolic blood pressure. For a subgroup (n=12) in which the effects of a single ISMN dose had been determined at the initiation of regular ISMN therapy, the mean change in augmentation index was of similar magnitude to that observed in their initial study. Thus, tolerance does not seriously diminish the antihypertensive efficacy of ISMN used as adjunct therapy in the chronic treatment of systolic hypertension. This agent lowers systolic blood pressure sufficiently to achieve therapeutic goal in some patients refractory to conventional treatment regimens.

Original languageEnglish
Pages (from-to)380-384
Number of pages5
JournalHypertension
Volume45
Issue number3
DOIs
Publication statusPublished - Mar 2005
Externally publishedYes

Keywords

  • Aged
  • Aged, 80 and over
  • Blood Pressure
  • Blood Pressure Monitoring, Ambulatory
  • Cross-Over Studies
  • Delayed-Action Preparations
  • Double-Blind Method
  • Drug Tolerance
  • Female
  • Humans
  • Hypertension
  • Isosorbide Dinitrate
  • Male
  • Middle Aged
  • Treatment Outcome
  • Vasodilator Agents
  • Clinical Trial
  • Journal Article
  • Randomized Controlled Trial

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