Pharm

Direct Acting Vasodilator

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Direct Acting Vasodilator, Diazoxide, Hyperstat, Vasodilator Antihypertensive Drugs

  • See Also
  1. Intravenous Antihypertensive
  2. Hypertensive Emergency
  3. Nitroprusside
  4. Hydralazine
  5. Fenoldopam
  • Mechanism
  1. Direct vasodilators relax vascular Smooth Muscle
  2. One mechanism of vasodilation is mediated by nitric oxide in the vascular endothelium
  • Medications
  • Direct Acting Vasodilators IV
  1. Hydralazine (Apresoline)
    1. Dose: 10-40 mg IV/IM q4-6h
  2. Hydralazine with Isosorbide Dinitrate 37.5/20 (BiDil)
    1. Dose: 1-2 tablets orally three times daily
    2. For Class III CHF patients (esp. African American)
    3. Very expensive: $400/month
    4. Generic Drugs separately are $60/month
  3. Diazoxide (Hyperstat)
    1. Dose: 1-3 mg/kg up to 150 mg IV q5-15 min
  4. Nitroprusside Sodium (Nipride)
  5. Minoxidil (Loniten)
  6. Fenoldopam (Corlopam)