Self T H, Morris T
Chest. 1980 Jun;77(6):800-1. doi: 10.1378/chest.77.6.800.
A 62-year-old man who had been taking 250 mg of chlorpropamide daily for several years received rifampin concomitantly and had a subsequent increased dosing requirement of chlorpropamide. When rifampin was discontinued several months later, the serum chlorpropamide concentration rose dramatically.