Suction magnesium in the gastrointestinal tract is no more than 50% of the dose taken. In the body, 99% of magnesium is found inside cells. Approximately 2/3 of intracellular magnesium is distributed in the bone tissue, and 1/3 is in the smooth and striated muscle tissue. It is excreted in the urine. Glomerular filtration is 70% of the plasma, tubular reabsorption - 95-97%. With urine, at least 1/3 of the intake of magnesium is taken.
Pyridoxine hydrochloride absorbed rapidly throughout the small intestine, a larger amount is absorbed in the jejunum. Metabolised in the liver with the formation of pharmacologically active metabolites (pyridoxal phosphate and pyridoxamine phosphate). Pyridoxal phosphate with plasma proteins binds to 90%. It penetrates well into all tissues; accumulates mainly in the liver, less - in the muscles and the central nervous system. Penetrates through the placenta, is secreted with breast milk. T1/2 - 15-20 days.It is excreted by the kidneys (with iv in the introduction - with bile 2%), as well as during hemodialysis. About 8-10% the drug is excreted in the urine unchanged.
Folic acid well and fully absorbed in the gastrointestinal tract, mainly in the upper parts of the duodenum. Intensively binds to plasma proteins. Penetrates through the blood-brain barrier, the placenta and into breast milk. The time to reach the maximum concentration is 60 minutes. Deposited and is metabolized in the liver to form tetrahydrofolic acid (in the presence of ascorbic acid under the action of dihydrofolate reductase). It is excreted by the kidneys, mainly in the form of metabolites.
Cyanocobalamin absorbed in the thin (partly in the thick) intestine, connecting with the internal factor, becomes protected from the microflora of the intestine. In blood Cyanocobalamin with the trans-balanamines I and II, with which it is transported to the tissues. Deposited Cyanocobalamin mainly in the liver, is excreted from the liver with bile in the intestine, from which it is again absorbed. Eliminated from the body by the kidneys. After oral administration up to 2 mg, 30-97% is absorbed, the absorption of the drug (depending on the internal absorption factor) after taking in a dose of more than 2 mg is markedly reduced. The connection with plasma proteins is 90%. FROMmOh after oral administration is achieved after 6-14 hours. T1/2 in the liver - 500 days. It is excreted at normal kidney function - 7-10% by kidneys, about 50% - with calves; with a reduced renal function - 0-7% kidney, 70-100% - with a caloric mass. Penetrates through the placental barrier, into breast milk.