Tolbutamide is used to treat type II (noninsulin-dependent) diabetes (formerly 'adult-onset'), particularly in people whose diabetes cannot be controlled by diet alone. Tolbutamide lowers blood sugar by stimulating the pancreas to secrete insulin and helping the body use insulin efficiently. The pancreas must produce insulin for this drug to work. Tolbutamide is not used to treat type I (insulin-dependent) diabetes (formerly 'juvenile-onset').
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