Cerefolin is a prescription medication made by Pamlab that contains 5.6 mg of folic acid as L-methylfolate, 2 mg of vitamin B12 as methylcobalamin and 600 mg of N-acetylcysteine (NAC). It is approved by the U.S. Food and Drug Administration for the treatment or prevention of vitamin deficiencies, but is used off-label to treat homocystinemia and homocystinuria. Some health care providers believe that reducing blood levels of homocysteine will reduce risks of certain cardiovascular diseases such as heart attacks and stroke. It is also being prescribed off-label by psychiatrists as an SSRI augmentor based on the perceived benefits of folate augmentation.