Acetylsalicylic acid.
Enhances the toxicity of methotrexate, reducing its renal klireks, enhances the effects of narcotic analgesics (oxycodone, propoxyphene, codeine), oral antidiabetic drugs, heparin, indirect anticoagulants, thrombolytic agents and platelet aggregation inhibitors, reduces the effect of uricosuric medicines (benzbromarone, sulfipirazone), antihypertensive drugs, diuretics (spironolactone, furosemide).
Glucocorticoids, ethanol and ethanol-containing drugs increase the negative effect on the mucous membrane of the gastrointestinal tract and increase the clearance. Increases the concentration of digoxin, barbiturates, lithium salts in plasma. Antatsida containing magnesium and / or aluminum, slow down and worsen the absorption of acetylsalicylic acid. Myelotoxic drugs increase the manifestation of hematotoxicity of acetylsalicylic acid.
Paracetamol.
Barbiturates, rifampicin, salicylamide, antiepileptic drugs and other inducers of microsomal liver enzymes contribute to the formation of toxic metabolites of paracetamol that affect liver function. Metoclopramide accelerates the absorption of paracetamol.
Under the influence of paracetamol, the half-life of chloramphenicol increases five-fold. At repeated reception paracetamol can enhance the effect of anticoagulants (coumarin derivatives).
Caffeine.
Caffeine is an adenosine antagonist (large doses of adenosine may be required). With the joint use of caffeine, and barbiturates, primidon, anticonvulsant drugs, disulfiram, ciprofloxacin, norfloxacin - a decrease in the metabolism of caffeine in the liver (slowing its elimination and increase in blood concentrations). Caffeine-containing beverages and other medicines that stimulate the central nervous system may cause excessive stimulation of the central nervous system.
Mexiletine - reduces the excretion of caffeine to -50%; nicotine - Increases the speed of caffeine removal.
Inhibitors of monoamine oxidase, furazolidone, procarbazine and selegiline - Large doses of caffeine can cause the development of dangerous cardiac arrhythmias or a marked increase in blood pressure.
Caffeine accelerates the absorption of ergotamine. Caffeine reduces the absorption of calcium in the gastrointestinal tract. Reduces the effect of narcotic and hypnotic drugs. Increases the excretion of lithium drugs with urine.
Accelerates absorption and enhances the action of cardiac glycosides, increases their toxicity.
Joint use of caffeine with beta-blockers can lead to mutual suppression of therapeutic effects; with adrenergic bronchodilator drugs - to additional stimulation of the central nervous system and other additive toxic effects. Caffeine can reduce the clearance of theophylline and, possibly, other xanthines, increasing the possibility of additive pharmacodynamic and toxic effects.