<p><strong>Glimepiride</strong>: Certain drugs tend to produce hyperglycemia and may lead to loss of control. These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, and isoniazid. When these drugs are administered to a patient receiving Glimepiride, the patient should be closely observed for loss of control. When these drugs are withdrawn from a patient receiving Glimepiride, the patient should be observed closely for hypoglycemia. A potential interaction between oral miconazole and oral hypoglycemic agents leading to severe hypoglycemia has been reported. Whether this interaction also occurs with the IV, topical, or vaginal preparations of miconazole is not known. Potential interactions of Glimepiride with other drugs metabolized by cytochrome P450 2C9 also include phenytoin, diclofenac, ibuprofen, naproxen, and mefenamic acid.<br />
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<strong>Pioglitazone</strong>: Co-administration of Pioglitazone and an oral contraceptive resulted in decrease in ethinyl estradiol plasma concentrations. There were no significant changes in norethindrone AUC (0-24h) and Cmax. In other drug-drug interaction studies, Pioglitazone had no significant effect on the pharmacokinetics of fexofenadine, metformin, digoxin, warfarin, ranitidine, or theophylline.</p>