Allergy to class/drug (including sulfa allergy)
Type 1 diabetes
Diabetic ketoacidosis
Caution if risk of severe hypoglycemia (elderly, debilitated, malnourished, adrenal/pituitary insufficiency, physiologic stressors)
Concomitant use of beta blockers or other sympatholytics (may impair ability to recognize symptoms of hypoglycemia)
Glipizide
Glyburide
Pioglitazone
Metformin
Intralipid
Fenofibrate
Gemfibrozil
Insulin