The use of intrathecal baclofen in pain management.

SUMMARY Intrathecal therapy involves the subarachnoid delivery of medications where the administered agents have enhanced potency and diminished systemic exposure compared with oral administration. Baclofen exerts its therapeutic action by enhancing the inhibition produced by the endogenous neurotransmitter GABA. While well-established within the armamentarium of tools for spasticity management, the role of intrathecal baclofen for the management of chronic pain is less certain. The purpose of this review is to describe the pharmacology of intrathecal baclofen, relate the role of intrathecal baclofen in neurologic and non-neurologic conditions, and report upon the potential utility of coadministering baclofen with other agents via the intrathecal route of delivery.