Glibenclamide is metabolized by cytochrome CYP2C9, which should be taken into account when it is used simultaneously with inducers or inhibitors CYP2C9.
An increase in the hypoglycemic effect of glibenclamide is observed with simultaneous use of angiotensin-converting enzyme inhibitors, anabolic agents and male sex hormones, other oral hypoglycemic drugs (eg, acarbose, biguanides) and insulin, non-steroidal anti-inflammatory drugs (NSAIDs), and azapropion. beta-adrenoblockers, guanethidine, quinine, quinolone derivatives, chloramphenicol, clofibrate,derivatives of coumarin, disopyramide, fenfluramine, pheniramidol, fluoxetine, monoamine oxidase inhibitors. antifungal agents (miconazole, fluconazole), p-aminosalicylic acid, pentoxifylline (in large doses administered parenterally), perhexiline derivatives, pyrazolones, phenylbutazone, phosphamide (e.g., cyclophosphamide, ifosfamide, trofosfamide), probenecid, salicylates, sulfinpirazona, sulfonamides, tetracyclines , clarithromycin and tritvaline.
Urine acidifying agents (ammonium chloride, calcium chloride) increase the effect of glibenclamide due to a decrease in the degree of its dissociation and increase its reabsorption. The hypoglycemic effect of glibenclamide may decrease with simultaneous use of barbiturates, isoniazid, cyclosporine, diazoxide, glucocorticosteroids, glucagon, epinephrine, nicotinate (in high doses), phenytoin, phenothiazines, rifampicin, ritordine, clonidine, thiazide diuretics, acetazole amide, estrogens (eg, oral hormonal contraceptives), preparations of iodine-containing hormones of the thyroid gland, blockers of "slow" calcium channels, sympathomimetic agents and lithium salts.
With simultaneous use with pentamidine in isolated cases, there may be a marked decrease or increase in the concentration of glucose in the blood.
The blockers of H2-histamine receptors, clonidine and reserpine are capable, both to strengthen, and to weaken hypoglycemic action of glibenclamide.
Under the influence of sympatholytic agents, such as beta-blockers, clonidine, guanethidine and reserpine, signs of adrenergic counterregulation in response to hypoglycemia may decrease or be absent.
A single or chronic use of alcohol can both enhance and weaken the hypoglycemic effect of glibenclamide.
Glibenclamide can enhance or weaken the effects of coumarin derivatives. Glibenclamide can increase the concentration in the plasma of cyclosporine and potentially lead to an increase in its toxicity, therefore, it is recommended to monitor the concentration and dose correction of cyclosporine when used simultaneously with glibenclamide.
When glibenclamide was used simultaneously with bosentan, there was an increase in the incidence of increased activity of "hepatic" enzymes. glibenclamide and bosentan inhibit the transfer of bile acids from the liver cells, which leads to their intracellular accumulation and enhancement of their cytotoxic effect. In this regard, the simultaneous use of glibenclamide and bosentan is contraindicated.
Drugs that inhibit bone marrow hematopoies increase the risk of myelosuppression.