<p>Due to its mechanism of action, Rosiglitazone is active only in the presence of endogenous insulin. Therefore, Rosiglitazone should not be used in patients with type 1 diabetes or for the treatment of diabetic ketoacidosis. Rosiglitazone, like other thiazolidinediones, alone or in combination with other antidiabetic agents, can cause fluid retention, which may exacerbate or lead to heart failure. Patients should be observed for signs and symptoms of heart failure. In combination with insulin, thiazolidinediones may also increase the risk of other cardiovascular adverse events. Rosiglitazone should be discontinued if any deterioration in cardiac status occurs. Rosiglitazone should be used with caution in patients with edema. Liver enzymes should be checked prior to the initiation of therapy with Rosiglitazone in all patients and periodically thereafter per the clinical judgement of the healthcare professional. Therapy with Rosiglitazone should not be initiated in patients with increased baseline liver enzyme levels (ALT &gt;2.5X upper limit of normal).</p>