Memantine was approved for medical use in the United States in 2003.[1] It is available as a generic medication.[2] A month supply in the United Kingdom costs the NHS about 1.60 GBP as of 2019.[3] In the United States the wholesale cost of this amount is about US$5.50.[4] In 2016 it was the 147th most prescribed medication in the United States with more than 4 million prescriptions.[5]