Baclofen is a drug used in the treatment of muscle spasticity. It is also currently undergoing research as a potential treatment for those with alcoholism. The drug works by augmenting a receptor known as the GABA B receptor. Baclofen, in essence, enhances the function of this receptor. As a result, muscle spasticity is reduced. Even though it is licensed for use in spastic disorders, baclofen cannot be prescribed for those with neurodegenerative conditions such as Parkinson's disease. Patients may experience severe withdrawal syndrome on discontinuation of this drug, irrespective of whether the dose is low or high.