INTRAVENOUS DOSING FOR ADULT PATIENTS |

Special considerations when using injection

VIMPAT® (lacosamide) CV IV Vial Image

(Formulation not shown at actual size.)

VIMPAT injection for intravenous use—indicated as short-term replacement when oral administration is not feasible. The safety of VIMPAT injection in pediatric patients has not been established. VIMPAT injection is indicated for the treatment of partial-onset seizures only in adult patients (17 years of age and older).2

  • Intravenous injection can be administered in the same dosing regimens as oral dosing, including the loading dose. The dose may be infused over a period of 15 to 60 minutes
  • Infusion over 30 to 60 minutes is preferable, and should be used when 15-minute administration is not required
  • Closely monitor patients with known cardiac conduction problems, on concomitant medications that prolong PR interval, or with severe cardiac disease, as intravenous infusion of VIMPAT may cause bradycardia or AV blocks in these patients
  • Cmax reached by end of infusion time
  • Oral to intravenous (IV): the initial total daily IV dosage regimen of VIMPAT should be equivalent to the total daily dosage regimen of oral VIMPAT
  • Adverse reactions with IV administration generally appeared similar to those observed with the oral formulation, although IV administration was associated with local adverse events, such as injection site pain or discomfort (2.5%), irritation (1%), and erythema (0.5%)
VIMPAT® (lacosamide) CV IV Administration Chart

Intravenous injection solution preparation

  • VIMPAT injection can be administered intravenously without further dilution or may be mixed with diluents listed below. The diluted solution should not be stored for more than 4 hours at room temperature
  • Diluents: Sodium Chloride Injection 0.9% (w/v), Dextrose Injection 5% (w/v), Lactated Ringer’s Injection
  • Product with particulate matter or discoloration should not be used
  • VIMPAT injection is for single-dose only—any unused portion of VIMPAT injection should be discarded

Important Safety Information

Warnings and Precautions

  • Suicidal Behavior and Ideation: Antiepileptic drugs (AEDs), including VIMPAT, increase the risk of suicidal behavior and ideation. Monitor patients taking VIMPAT for the emergence or worsening of depression, suicidal thoughts or behavior, and/or any unusual changes in mood or behavior. Advise patients and caregivers to be alert for these behavioral changes and to immediately report them to the healthcare provider.

  • Dizziness and Ataxia: VIMPAT may cause dizziness and ataxia. In adult clinical trials, the onset of dizziness and ataxia was most commonly observed during titration. Advise patients not to drive, operate complex machinery, or engage in other hazardous activities until they are familiar with the effects of VIMPAT on their ability to perform such activities. Dizziness and ataxia were also observed in pediatric clinical trials.

  • Cardiac Rhythm and Conduction Abnormalities:

    PR interval prolongation

    Dose-dependent prolongations in PR interval with VIMPAT have been observed in clinical studies in adult patients and in healthy volunteers. Second-degree and complete AV block have been reported in patients with seizures. When VIMPAT is given with other drugs that prolong the PR interval, further PR prolongation is possible.

    Use VIMPAT with caution in patients with known cardiac conduction problems (e.g., marked first-degree AV block, second-degree or higher AV block and sick sinus syndrome without pacemaker), sodium channelopathies (e.g., Brugada Syndrome), or with severe cardiac disease such as myocardial ischemia or heart failure, or structural heart disease. Also, use VIMPAT with caution in patients on concomitant medications that prolong PR interval (e.g., beta-blockers and calcium channel blockers) because of a risk of AV block or bradycardia. In such patients, obtaining an ECG before beginning VIMPAT, and after VIMPAT is titrated to steady-state maintenance dose, is recommended. In addition, closely monitor these patients if they are administered VIMPAT through the intravenous route.

    Atrial fibrillation and Atrial flutter

    VIMPAT administration may predispose to atrial arrhythmias (atrial fibrillation or flutter), especially in patients with diabetic neuropathy and/or cardiovascular disease.

  • Syncope: VIMPAT may cause syncope in adult and pediatric patients.

  • Withdrawal of Antiepileptic Drugs: Gradually withdraw VIMPAT (over a minimum of 1 week) to minimize the potential of increased seizure frequency.

  • Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS): Also known as multi-organ hypersensitivity, has been reported with antiepileptic drugs. Some of these events have been fatal or life-threatening. If signs or symptoms are present, immediately evaluate the patient. Discontinue VIMPAT if an alternative etiology for the signs and symptoms cannot be established.

  • Risks in Patients with Phenylketonuria: VIMPAT oral solution contains aspartame, a source of phenylalanine which can be harmful in patients with phenylketonuria (PKU). A 200 mg dose of VIMPAT oral solution (equivalent to 20 mL) contains 0.32 mg of phenylalanine.

Adverse Reactions

  • Adjunctive therapy: In the adult placebo-controlled clinical trials, the most frequently seen adverse reaction with VIMPAT was dizziness (31% vs 8% placebo). Other common adverse reactions occurring in ≥10 percent of VIMPAT-treated patients, and greater than placebo, were headache, nausea, and diplopia.

  • Monotherapy: In the adult clinical trial, adverse reactions were generally similar to those observed and attributed to drug in adjunctive placebo-controlled trials, with the exception of insomnia (occurred at a higher rate of ≥2%).

  • Pediatric patients: Adverse reactions reported in clinical studies of pediatric patients 4 to less than 17 years of age were similar to those seen in adult patients.

  • Injection: In adult adjunctive therapy clinical trials, adverse reactions with intravenous administration generally were similar to those that occurred with the oral formulation, although intravenous administration was associated with local adverse reactions such as injection site pain or discomfort (2.5%), irritation (1%), and erythema (0.5%). When administering a loading dose, the incidence of CNS adverse reactions, such as dizziness, somnolence, and paresthesia may be higher with 15-minute administration than over a 30- to 60-minute period.

Dosing Considerations

VIMPAT injection is for intravenous and adult use only when oral administration is temporarily not feasible. The loading dose for adult patients should be administered with medical supervision considering the VIMPAT pharmacokinetics and increased incidence of CNS adverse reactions. The safety of VIMPAT injection and the use of a loading dose in pediatric patients have not been studied. Dosage adjustments are recommended for patients with mild or moderate hepatic impairment or severe renal impairment. Use in patients with severe hepatic impairment is not recommended. Perform dose titration with caution in all patients with renal and/or hepatic impairment.

VIMPAT is a Schedule V controlled substance.

Please see full Prescribing Information.

For more information on VIMPAT® contact 844-599-CARE (2273).