Carbamazepine (CBZ), sold under the trade name Tegretol among others, is an anticonvulsant medication used primarily in the treatment of epilepsy and neuropathic pain. It is not effective for absence or myoclonic seizures. Common side effects include nausea and drowsiness. It was first marketed in 1962. It is available as a generic medication. It is on the World Health Organization's List of Essential Medicines, which lists the most effective and safe medicines needed in a health system. The wholesale cost in the developing world is between 0.01 and US$0.07 per dose as of 2014. In 2016, it was the 197th most prescribed medication in the United States, with more than 2 million prescriptions.