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Vaprisol Generic Name & Formulations
Legal Class
Rx
General Description
Conivaptan HCl 20mg/100mL in 5% dextrose; soln for IV infusion.
Pharmacological Class
Dual arginine vasopressin (V1A and V2) receptors antagonist.
How Supplied
Single-use premixed soln—1
Manufacturer
Vaprisol Indications
Indications
Euvolemic and hypervolemic hyponatremia in hospitalized patients.
Limitations of Use
Not effective for treating signs/symptoms of heart failure.
Vaprisol Dosage and Administration
Adult
Administer via large veins; rotate infusion site every 24hrs. Loading dose: 20mg IV over 30mins, followed by 20mg continuous IV infusion over 24hrs. After initial day of treatment, give 20mg/day continuous IV infusion for an additional 1–3 days; may titrate up to max 40mg/day if serum sodium is not rising at desired rate. Max duration after loading dose: 4 days. Moderate and severe hepatic impairment: Loading dose: 10mg IV over 30mins, followed by 10mg/day as continuous IV infusion for 2–4 days; may titrate up to max 20mg/day if serum sodium is not rising at desired rate.
Children
Not established.
Vaprisol Contraindications
Contraindications
Hypovolemic hyponatremia. Concomitant potent CYP3A4 inhibitors (eg, ketoconazole, itraconazole, clarithromycin, ritonavir, indinavir). Anuric patients.
Vaprisol Boxed Warnings
Not Applicable
Vaprisol Warnings/Precautions
Warnings/Precautions
Monitor serum sodium concentration, volume status, neurologic status. Discontinue if serum sodium rises too rapidly (>12mEq/L per 24hrs); may resume at reduced dose if hyponatremia persists or recurs and no evidence of neurologic sequelae. Discontinue if hypovolemia or hypotension develops; frequently monitor volume status and vital signs; may resume at reduced dose if euvolemic and not hypotensive. Severe renal impairment: not recommended. Pregnancy. Nursing mothers: not recommended.
Vaprisol Pharmacokinetics
See Literature
Vaprisol Interactions
Interactions
See Contraindications. Potentiated by CYP3A4 inhibitors. Potentiates CYP3A4 substrates (eg, midazolam, simvastatin, amlodipine); avoid; allow at least 1 week after end of conivaptan administration before resuming these drugs. May potentiate digoxin; monitor.
Vaprisol Adverse Reactions
Adverse Reactions
Infusion site reactions (eg, phlebitis, erythema, pain), GI upset, headache, hypokalemia, hyponatremia, orthostatic hypotension, hyper- or hypotension, peripheral edema, thirst, pyrexia.
Vaprisol Clinical Trials
See Literature
Vaprisol Note
Not Applicable
Vaprisol Patient Counseling
See Literature
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