Lyrica also known as pregabalin was originally FDA approved as an anti-epileptic drug, also called an anticonvulsant. Lyrica works by slowing down impulses in the brain that cause seizures. Pregabalin also affects chemicals in the brain that send pain signals across the nervous system. Read the Medication Guide and, the Patient Information Leaflet provided by your pharmacist before you start using pregabalin and each time you get a refill. If you have any questions regarding the information, consult your doctor or pharmacist.