1. A pharmaceutical compounding device comprising a driver, a drive shaft coupled to the driver for rotation, the drive shaft extending along a first axis, an idler shaft extending along a second axis offset from the first axis, a peristaltic pump rotor carried on the idler shaft, a drive gear carried on the drive shaft and coupled to the peristaltic pump rotor, and a clutch assembly on the drive shaft coupled to the drive gear, the clutch assembly being operable in a first mode to disengage the drive gear from the drive shaft and a second mode to engage the drive gear with the drive shaft, to thereby selectively impart rotation of the drive shaft to the peristaltic pump rotor.