Conditioned by paracetamol:
Reduces the effectiveness of uricosuric medicines (LS). The concomitant use of paracetamol in high doses increases the effect of anticoagulant drugs (a decrease in the synthesis of procoagulant factors in the liver).
Inductors of microsomal oxidation in the liver (phenytoin, barbiturates, rifampicin, phenylbutazone, tricyclic antidepressants), ethanol and hepatotoxic drugs increase the production of hydroxylated active metabolites, which allows the development of severe intoxication even with a slight overdose.
Long-term use of barbiturates reduces the effectiveness of paracetamol.
Ethanol promotes the development of acute pancreatitis.
Inhibitors of microsomal oxidation (incl. cimetidine) reduce the risk of hepatotoxic effects.
Long-term combined use of paracetamol and other non-steroidal anti-inflammatory drugs increases the risk of developing analgesic nephropathy and renal papillary necrosis, the onset of the terminal stage of renal failure.Current simultaneous administration of paracetamol in high doses and salicylates increases the risk of developing kidney or bladder cancer.Diflunisal increases plasma concentration paracetamol by 50% - the risk of hepatotoxicity.
Myelotoxic drugs increase the manifestation of hematotoxicity of the drug.
Due to phenyramine:
Antidepressants, antiparkinsonian and antipsychotic (phenothiazine derivatives) drugs increase the risk of side effects of phenyramine (urinary retention, dry mouth, constipation), glucocorticosteroids (GCS) increase the risk of developing glaucoma.
Due to ascorbic acid:
Increases the concentration in the blood of benzylpenicillin and tetracyclines; in a dose of 1 g / day increases the bioavailability of ethinyl estradiol (including those included in oral contraceptives).
Improves absorption in the intestine of iron preparations (converts trivalent iron into bivalent iron.
Reduces the effectiveness of heparin and indirect anticoagulants. Acetylsalicylic acid (ASA), oral contraceptives, fresh juices and alkaline drink reduce absorption and absorption.
With simultaneous application with ASA, urinary excretion of ascorbic acid increases and the excretion of ASA decreases.
Increases the risk of development of crystallopuria in the treatment of salicylates and sulfonamides short-acting, slows the excretion of kidney acids, increases the excretion of drugs that have an alkaline reaction (including alkaloids), reduces the concentration of oral contraceptives in the blood. Increases the total clearance of ethanol, which in turn reduces the concentration of ascorbic acid in the body.
Quinoline drugs, calcium chloride, salicylates, GCS with long-term use deplete the stores of ascorbic acid.
With prolonged use or use in high doses, it can interfere with the interaction of disulfiram and ethanol.
In high doses increases the excretion of mexiletine by the kidneys.
Barbiturates and primidon increase the excretion of ascorbic acid in the urine.
Reduces the therapeutic effect of antipsychotic drugs (neuroleptics) - phenothiazine derivatives, tubular reabsorption of amphetamine and tricyclic antidepressants.