Suction. After oral administration, both components of the drug are rapidly absorbed from the gastrointestinal tract. Absorption of active ingredients of the drug is optimal in case of its intake at the beginning of the meal.
After taking Inside at a dose of 250 mg + 125 mg:
- maximum concentration (Сmah) amoxicillin - 3.7 μg / ml, clavulanic acid - 2.2 μg / ml;
- time to reach the maximum concentration (Tmah) amoxicillin -, 1,1 h, clavulanic acid - 1.2 h;
- the area under the concentration-time curve (AUC) of amoxicillin is 10.9 mg-h / l. clavulanic acid -6.2 mg-h / l.
After oral administration at a dose of 500 mg + 125 mg:
- C amaxicillin - 6.5 μg / ml, clavulanic acid - 2.8 μg / ml;
- Tmah amoxicillin - 1.5 h, clavulanic acid - 1.3 h; :
- AUC amoxicillin 23.2 mg-h / l, clavulanic acid - 7.3 mg-h / l.
After oral administration at a dose of 875 mg + 125 mg:
- FROMmah amoxicillin - 8,8 mkg / ml, clavulanic acid - 2.07 mcg / ml;
- Tmah amoxicillin - 1.5 h, clavulanic acid - 1.5 h;
- AUC amoxicillin - 25.4 mg-h / l, clavulanic acid - 6.1 mg-h / l.
When the drug is used, concentrations of amoxicillin in the blood serum are similar to those for oral administration of equivalent doses of one amoxicillin.
Distribution. Both components of the preparation are characterized by a good volume of distribution - therapeutic concentrations of amoxicillin and clavulanic acid are created in various organs and tissues, interstitial fluid: the lungs, middle ear, abdominal organs, small pelvic organs (prostate gland, uterus, ovaries), skin, fat, bone and muscle tissues, pleural, synovial and peritoneal. liquids; plasma, bile, purulent discharge, sputum, bronchial secretion.
Amoxicillin and clavulanic acid have a moderate degree of binding to plasma proteins, respectively, by 18% and 25%.
Both components of the drug penetrate the placental barrier, but there is no published data on the negative effect on the fetus.
Amoxicillin and clavulanic acid in low concentrations are found in breast milk.
Metabolism, excretion. Approximately 60-70% of amoxicillin is excreted by the kidneys: by tubular secretion and by glomerular filtration. Clavulanic acid is actively metabolized in the liver and is excreted by glomerular filtration (40-65%), partially in the form of metabolites. The smaller part is excreted by the intestine.
With renal failure, the clearance of amoxicillin with clavulanic acid decreases, so dose adjustment is required.