Suction
After ingestion, the complex of sacubitryl and valsartan decomposes into saccitrile, which is then metabolized to form the metabolite LBQ657, and valsartan; the concentrations of these substances in the blood plasma reach a maximum after 0.5 hours, 3 hours and 1.5 hours, respectively. Absolute bioavailability of saccitribil and valsartan after oral administration is ≥60% and 23% respectively.
In the case of receiving the complex of sakubitril and valsartan, the equilibrium concentrations of sacubitryl, LBQ657 and valsartan are reached twice a day after 3 days. There is no statistically significant accumulation of sakubitrile and valsartan in the equilibrium state; At the same time, the accumulation of LBQ657 exceeds the concentration by a single application of 1.6 times. The use of the complex of sakubitrile and valsartan at the same time as food intake had no clinically significant effect on systemic exposure to saccitrile, LBQ657, and valsartan. Reducing the exposure of valsartan in the case of a combination of sakubitrile and valsartan at the same time as food intake is not accompanied by a clinically significant decrease in the therapeutic effect. The use of the complex of sakubitril and valsartan does not depend on the time of eating.
Distribution
The complex of sakubitrile and valsartan is largely associated with blood plasma proteins (94% - 97%). Comparison of exposures in blood plasma and CSF shows that LBQ657 penetrates to a small extent through the blood-brain barrier (0.28%). The apparent volume of distribution of the complex of sakubitrile and valsartan is from 107.8 to 157.4 liters.
Metabolism
Sacubitryl under the action of enzymes quickly turns into a metabolite LBQ657, which further is not significantly metabolized. Valsartan is metabolized to an insignificant degree, in the form of metabolites only about 20% of the administered dose is detected. In blood plasma at low concentrations (<10%) was found hydroxyl metabolite. Since both sacubitryl and valsartan are minimally metabolized with the participation of cytochrome CYP450 isoenzymes, a change in their pharmacokinetics in the case of simultaneous use of drugs, affecting isozymes CYP450, is submitted unlikely.
Excretion
After oral administration, 52-68% of saccitrile (mainly in the form of LBQ657) and ~ 13% of valsartan and its metabolites are excreted by the kidneys; 37-48% of saccitrile (mainly in the form of LBQ657) and 86% of valsartan and its metabolites are excreted through the intestine.
Sacubitryl, LBQ657 and valsartan are derived from blood plasma with average half-life (T½) of about 1.43 hours, 11.48 hours and 9.90 hours, respectively.
Linearity / nonlinearity
In the studied range of doses of the complex of sakubitril and valsartan (50-400 mg), the pharmacokinetic parameters of sacubitryl, LBQ657 and valsartan vary in proportion to the dose.
Pharmacokinetics in special clinical cases
Patients over 65 years of age
Exposures of LBQ657 and valsartan in this category of patients are higher by 42% and 30%, respectively, than in patients of younger age. Such differences are not associated with clinically significant effects, so adjust the dose of the drug is not required.
Patients under the age of 18 years
The complex of sakubitril and valsartan in this category of patients was not studied.
Patients with impaired renal function
For LBQ657, there was a correlation between renal function and the area under the concentration-time curve (AUC), no correlation was observed for valsartan. In patients with impaired renal function of mild to moderate severity (calculated glomerular filtration rate (rSKF)> 30 ml / min /1.73 m2 Psurface area of the body to <60 ml / min / 1.73 m2 body surface area) AUC for LBQ657 was 2 times higher than in patients with normal renal function. In patients with impaired renal function of severe severity (rSKF <30 ml / min /1.73 m2 Psurface area) AUC for LBQ657 increased by 2.7 times. In patients with impaired renal function of mild to moderate severity, dosage adjustment is not required. Data on the use in patients with impaired renal function of severe severity is not enough,When using the complex of sakubitril and valsartan in this category of patients, it is recommended to be cautious.
There are no data on the use of the complex of sakubitrile and valsartan in patients on hemodialysis. However, LBQ657, and valsartan are largely associated with blood plasma proteins, so their effective removal from the blood during hemodialysis is unlikely.
Patients with hepatic impairment
In patients with impaired hepatic function of mild to moderate degrees of severity, exposure of sacubitryl increased by 1.5 and 3.4 times, respectively. Exposition LBQ657 - in 1,5 and 1,9 times, and valsartan - in 1,2 and 2,1 times (in comparison with healthy volunteers). In patients with impaired liver function of mild to moderate severity (class A and B according to the Child-Pugh classification), including patients with biliary tract obstruction, the dose of the sakubitrile and valsartan complex is not required to be corrected. The study of the use of the complex of sakubitrile and valsartan in patients with violations of liver function of severe severity was not carried out, the drug is not recommended for this category of patients.
Ethnicity
The pharmacokinetics of the complex of sakubitrile and valsartan in patients from different racial and ethnic groups do not differ significantly.
Floor
Pharmacokinetics of the complex of sakubitril and valsartan (sacubitryl, LBQ657 and valsartan) in men and women does not differ significantly.