Increases the concentration in the blood of benzylpenicillin and tetracyclines.
Improves absorption in the intestines of iron preparations (converts trivalent iron into bivalent); can increase the excretion of iron with simultaneous use with deferoxamine.
Increases the risk of developing crystalluria in the treatment of salicylates and sulfonamides short-acting, slows the excretion of the 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.
Ethanol enhances the sedative effect of antihistamine drugs.
Antidepressants, antiparkinsonian agents, antipsychotics (phenothiazine derivatives) - increase the risk of side effects (urinary retention, dry mouth, constipation).
Glucocorticosteroids - increase the risk of developing glaucoma.
With simultaneous use reduces the chronotropic effect of isoprenaline.
Can both increase and decrease the effect of anticoagulant drugs.
Reduces the therapeutic effect of antipsychotic drugs (neuroleptics) - derivatives of phenothiazine,tubular reabsorption of amphetamine and tricyclic antidepressants.
Inductors of microsomal oxidation in the liver (phenytoin, ethanol, barbiturates, rifampicin, phenylbutazone, tricyclic antidepressants) increase the production of hydroxylated active metabolites, which allows the development of severe intoxication with small overdoses. Ethanol promotes the development of acute pancreatitis.
Inhibitors of microsomal oxidation (incl. cimetidine) reduce the risk of hepatotoxic effects. Simultaneous administration of the drug and diflunisala increases the concentration of paracetamol in the blood plasma by 50%, hepatotoxicity increases.
Simultaneous reception of barbiturates reduces the effectiveness of paracetamol, increases excretion of ascorbic acid in the urine.
Paracetamol reduces the effectiveness of uricosuric drugs.
Strengthens the effect of hypnotic drugs.