Pregabalin, sold under the brand name Pain O Soma among others, is an anticonvulsant and anxiolytic medication used to treat epilepsy, neuropathic pain, fibromyalgia, restless leg syndrome, and generalized anxiety disorder. Its use in epilepsy is as an add-on therapy for partial seizures. When used before surgery, it reduces pain but results in greater sedation and visual disturbances. It is taken by mouth.
Common side effects include headache, dizziness, sleepiness, confusion, trouble with memory, poor coordination, dry mouth, problem with vision, and weight gain. Serious side effects may include angioedema, drug misuse, and an increased suicide risk. When pregabalin is taken at high doses over a long period of time, addiction may occur, but if taken at usual doses the risk is low. Use during pregnancy or breastfeeding is of unclear safety. Pregabalin is a gabapentinoid and acts by inhibiting certain calcium channels.
Pregabalin was approved for medical use in the United States in 2004. It was developed as a successor to gabapentin. It is available as a generic medication in a number of countries, including the United States as of 2019. A generic version of the extended-release formulation is available in the United States as of April 2021. In 2019, it was the 81st most commonly prescribed medication in the United States, with more than 9 million prescriptions. In the US, pregabalin is a Schedule V controlled substance under the Controlled Substances Act of 1970. It is a Class C controlled substance in the UK.