Dosing regimen
Monotherapy in adults and adolescents with 16 years
The recommended initial dose is 250 mg twice daily, which must be increased two weeks before the initial therapeutic 500 mg twice daily. The dose may be increased in increments of 250 mg twice a day every two weeks, depending on the clinical response. The maximum dose is 1500 mg twice a day.
Adjuvant therapy in adults (≥18 years) and adolescents (12-17 years) with a body weight of 50 kg and more
The initial therapeutic dose is 500 mg twice a day. This dose can be used from the first day of treatment.
Depending on the clinical response and tolerability, the daily dose can be raised to 1500 mg twice a day. The dose may be increased or decreased by 500 mg twice a day every 2-4 weeks.
Special patient groups
Elderly (65 years and over)
In elderly patients with impaired renal function, it is recommended to adjust the dose (see "Renal failure" below).
Renal insufficiency
Depending on the degree of impaired renal function, the daily dose is selected individually.To use the dose adjustment table, calculate the creatinine clearance of the patient in ml / min. QC in ml / min can be determined using the magnitude of serum creatinine (mg / dl) by the following formula (for adults and adolescents weighing 50 kg or more):
CK (ml / min) = [140-yr (years)] x body weight (kg) / 72 x creatinine concentration (mg / dl)
Then, correction for the body surface area (TFT) is introduced as follows:
KK (ml / mn / 1.73 m2) = KK (ml / min) / PPT (m2) *1,73
Dose adjustment in adults and adolescents with renal dysfunction, whose body weight is> 50 kg
Group | Creatinine clearance (ml / min / 1.73 m2) | Dose and frequency of admission |
Norm | >80 | 500-1500 mg 2 times a day |
Lightweight | 50-79 | 500-1000 mg twice daily |
Medium | 30-49 | 250-750 mg 2 times a day |
Heavy | <30 | 250-500 mg 2 times a day |
Terminal stage of renal failure - patients on hemodialysis (1) | | 500-1000 mg once a day (2) |
(1) On the first day, a loading dose of 750 mg is recommended.
(2) Upon completion of hemodialysis, an additional 250 or 500 mg dose is recommended.
Due to the fact that the clearance of levetiracetam depends on the function of the kidneys, children with renal insufficiency are selected for its dose depending on the QC. These guidelines are based on studies in adult patients.KK in ml / min / 1.73 m2 in children and adolescents can be estimated from the plasma concentration of creatinine (in mg / dL) according to the following formula (Schwarz formula):
KK (ml / min / 1,73 m2) = Height (cm) x ks / creatinine concentration (mg / dl)
where ks = 0.45 for children up to 1 year; 0.55 for children aged 1-13 years and females; 0,7 - adolescent male.
Correction of the dose in children and adolescents with impaired renal function, whose body weight is <50 kg
Group | KK (ml / min / 1.73 m2) | Dose and frequency of admission |
From the age of 6 |
Norm | >80 | 10-30 mg / kg 2 times a day |
Lightweight | 50-79 | 10-20 mg / kg 2 times a day |
Medium | 30-49 | 5-15 mg / kg 2 times per day |
Heavy | <30 | 5-10 mg / kg 2 times a day |
Terminal stage of renal failure - patients on hemodialysis (1) | | 10-20 mg / kg once a day (2) (3) |
(1) The oral solution is used for doses of <250 mg and in patients who are unable to swallow tablets.
(2) On the first day, a loading dose of 15 mg / kg (0.15 ml / kg) is recommended.
(3) Upon completion of hemodialysis, an additional dose of 5-10 mg / kg (0.05-0.1 ml / kg) is recommended.
Impaired liver function
In patients with mild to moderate hepatic insufficiency, dose adjustment is not required. In patients with severe hepatic insufficiency, the value of QA can be misleading about the degree of renal failure.
Therefore, for KK <60 ml / min / 1.73 m2 should reduce the maintenance dose of the drug by 50%.
Children
The drug is prescribed in the most convenient dosage form and dosage depending on the age, body weight and the required dose.
Tablets are not intended for use in children younger than 6 years. In such patients, the drug should be administered in a dosage form for oral administration. In addition, the available dosage of tablets is not intended for initial dose selection in children weighing less than 25 kg, patients who are unable to swallow tablets, and also if necessary to take a dose of <250 mg. In all these cases, it is recommended to use the solution for oral administration.
Monotherapy
The efficacy and safety of levetiracetam in children and adolescents under 16 years of age has not been established as monotherapy. No data available. Auxiliary therapy in children 6-17 years old and weighing less than 50 kg The initial dose is 10 mg / kg 2 times a day.
Depending on the clinical response and tolerability, the dose may be increased to 30 mg / kg 2 times a day. The dose may be increased or decreased in steps of 10 mg / kg twice a day every two weeks. It is necessary to apply the lowest effective dose. The dosage regimen in children with a body weight of 50 kg or more is not different from adults.
Recommended doses in children from 6 years of age
Body mass | Initial dose: 10 mg / kg twice daily | Maximum dose: 30 mg / kg 2 times a day |
25 kg(1) | 250 mg twice daily | 750 mg twice a day |
From 50 kg(2) | 500 mg twice a day | 1500 mg twice a day |
(1) For children with a body weight of 25 kg or less, it is recommended that the drug be administered in a dosage form for oral administration, 100 mg / ml
(2) The dosage regimen in children weighing 50 kg or more is not different from adults.
Mode of application
Inside, squeezed enough water, regardless of food intake. The daily dose is divided into two equal doses.