Substances that may reduce the blood-glucose-lowering effect include corticosteroids, danazol, diazoxide, diuretics, glucagon, isoniazid, oestrogens and progestogens, phenothiazine derivatives, somatropin, sympathomimetic agents (e. g. epinephrine [adrenaline], salbutamol, terbutaline) thyroid hormones, atypical antipsychotic medicinal products (e. g. clozapine and olanzapine) and protease inhibitors.