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Pronunciation |
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(fe
NOL doe
pam) |
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U.S. Brand
Names |
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Corlopam® |
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Generic
Available |
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No |
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Synonyms |
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Fenoldopam Mesylate |
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Pharmacological Index |
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Dopamine Agonist |
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Use |
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Treatment of severe hypertension particularly I.V. and in patients with renal
compromise; potential use for congestive heart failure |
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Contraindications |
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Hypersensitivity of fenoldopam or any component; hypersensitivity to sulfites
(contains sodium metabisulfite) |
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Warnings/Precautions |
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Use caution in patients with glaucoma or intraocular hypertension. A
dose-related tachycardia can occur, especially at infusion rates >0.1
mcg/kg/minute. Use caution in angina patients (can increase myocardial oxygen
demand with tachycardia). Close monitoring of blood pressure is necessary
(hypotension can occur). Monitor for hypokalemia at intervals of 6 hours during
infusion. Safety and effectiveness in children have not been established. For
continuous infusion only (no bolus doses). The effects of of hemodialysis on the
pharmacokinetics of fenoldopam have not been evaluated. |
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Adverse
Reactions |
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Percentage unknown: Hypotension, edema, tachycardia, facial flushing,
asymptomatic T-wave flattening, flutter (atrial), fibrillation (atrial), chest
pain, angina in patients with history of unstable angina, headache, dizziness,
nausea, vomiting, diarrhea, xerostomia, intraocular pressure (increased),
blurred vision, increases in portal pressure in cirrhotic
patients |
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Drug
Interactions |
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Concurrent acetaminophen may increase fenoldopam levels (30% to 70%).
Beta-blockers increase the risk of hypotension. |
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Stability |
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Store ampuls at room temperature; diluted solution is stable for less than or
equal to 24 hours; discard any diluted solution that is not used after 24
hours |
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Mechanism of
Action |
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A selective postsynaptic dopamine agonist (D1-receptors) which
exerts hypotensive effects by decreasing peripheral vasculature resistance with
increased renal blood flow, diuresis, and natriuresis; 6 times as potent as
dopamine in producing renal vasodilitation; has minimal adrenergic
effects |
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Pharmacodynamics/Kinetics |
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Onset of action: I.V.: 10 minutes
Duration: Oral: 2-4 hours; I.V.: 1 hour
Absorption: Oral: Good, however, undergoes extensive first-pass metabolism;
peak serum levels at 1 hour after oral doses
Distribution: Vd: 0.6 L/kg
Half-life: I.V.: 9.8 minutes
Metabolism: Hepatic to multiple metabolites; the 8-sulfate metabolite may
have some activity
Elimination: Renal (80%), fecal (20%) |
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Usual Dosage |
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I.V.: Severe hypertension: Initial: 0.1 mcg/kg/minute; may be increased in
increments of 0.05-0.2 mcg/kg/minute until target blood pressure is achieved;
average rate: 0.25-0.5 mcg/kg/minute; usual length of treatment is 1-6 hours
with tapering of 12% every 15-30 minutes
Dosing adjustment in hepatic impairment: None published
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Monitoring
Parameters |
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Blood pressure, heart rate, EKG, renal/hepatic function
tests |
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Reference Range |
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Mean plasma fenoldopam levels after a 2 hour infusion (at 0.5
mg/kg/minute) and a 100 mg dose is approximately 13
ng/mL
and 50 ng/mL |
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Mental Health: Effects
on Mental Status |
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May cause dizziness |
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Mental Health:
Effects on Psychiatric
Treatment |
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Causes hypotension; caution with low potency antipsychotics and
TCAs |
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Dental Health: Local
Anesthetic/Vasoconstrictor
Precautions |
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No information available to require special precautions |
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Dental Health:
Effects on Dental Treatment |
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No effects or complications reported |
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Dosage Forms |
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Injection: 10 mg/mL (5 mL) |
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