The FDA first authorized pregabalin in 2004 as an anticonvulsant and antiepileptic drug. The brain chemicals that signal the nervous system to pain are likewise impacted by pregabalin. It slows down the brain impulses. Pregabalin is used to treat fibromyalgia pain, diabetic neuropathy, post-herpetic neuralgia, herpes zoster pain, and spinal cord injury pain.