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Fenoldopam
Pronunciation
U.S. Brand Names
Generic Available
Synonyms
Pharmacological Index
Use
Contraindications
Warnings/Precautions
Adverse Reactions
Drug Interactions
Stability
Mechanism of Action
Pharmacodynamics/Kinetics
Usual Dosage
Monitoring Parameters
Reference Range
Mental Health: Effects on Mental Status
Mental Health: Effects on Psychiatric Treatment
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Dosage Forms

Pronunciation
(fe NOL doe pam)

U.S. Brand Names
Corlopam®

Generic Available

No


Synonyms
Fenoldopam Mesylate

Pharmacological Index

Dopamine Agonist


Use

Treatment of severe hypertension particularly I.V. and in patients with renal compromise; potential use for congestive heart failure


Contraindications

Hypersensitivity of fenoldopam or any component; hypersensitivity to sulfites (contains sodium metabisulfite)


Warnings/Precautions

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.


Adverse Reactions

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


Drug Interactions

Concurrent acetaminophen may increase fenoldopam levels (30% to 70%).

Beta-blockers increase the risk of hypotension.


Stability

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


Mechanism of Action

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


Pharmacodynamics/Kinetics

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%)


Usual Dosage

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


Monitoring Parameters

Blood pressure, heart rate, EKG, renal/hepatic function tests


Reference Range

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


Mental Health: Effects on Mental Status

May cause dizziness


Mental Health: Effects on Psychiatric Treatment

Causes hypotension; caution with low potency antipsychotics and TCAs


Dental Health: Local Anesthetic/Vasoconstrictor Precautions

No information available to require special precautions


Dental Health: Effects on Dental Treatment

No effects or complications reported


Dosage Forms

Injection: 10 mg/mL (5 mL)


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