Paracetamol
After oral administration, it is completely absorbed in the gastrointestinal tract. The maximum concentration in the blood plasma is reached after 20-30 minutes.The connection with plasma proteins is 15%. Penetrates through the blood-brain barrier, enters the breast milk.
Metabolism in the liver by glucuronation and sulfation (80%) with formation of inactive metabolites, about 17% is hydroxylated to active metabolites, which are subsequently deactivated after conjugation with sulfates and glutathione. With a lack of glutathione, these metabolites block the enzyme systems of the liver, causing necrosis of hepatocytes.
Half-life is 2-3 hours. Elimination by the kidneys, about 3% unchanged.
Ascorbic acid
Completely absorbed from the gastrointestinal tract after ingestion. The connection with plasma proteins is 25%. Normally, the concentration of ascorbic acid in the blood is 15-20 μg / ml. The concentration of ascorbic acid in erythrocytes and plasma is lower than in platelets and leukocytes.
Ascorbic acid is oxidized to dehydroascorbic acid, metabolized to inactive ascorbate-2-sulfate and oxalic acid, then excreted in the urine. In cases of exceeding the dose (more than 200 mg.) ascorbic acid is eliminated by the kidneys in an unchanged form.