S-adenosyl-L-methionine (SAMe) as an adjunct for resistant major depressive disorder: an open trial following partial or nonresponse to selective serotonin reuptake inhibitors or venlafaxine.
Alpert JE, Papakostas G, Mischoulon D, Worthington JJ 3rd, Petersen T, Mahal Y, Burns A, Bottiglieri T, Nierenberg AA, Fava M. J Clin Psychopharmacol. 2004 Dec; 24(6):661-4.