Yes! Thank you! My son age 32 is passing out, and exhibiting hallucinations. This has come on and worsened over months. He has long time rxs with the same physician of many years. He takes Ultram ER and Cymbalta and there is something called serotoin syndrome toxicity that matches his symptoms. His doctor just responded that he doesn't have enough symtoms such as gastrointestinal, sweating, and coma to be that interaction. (unrelated to these medications, My husband developed atypical symptoms of a possible drug interaction after many years of the same meds/no changes. It turned out that it was an interaction causing his problems.) Is it possible that my son's doctor is wrong? The FDA site for cymbalta says that not all symptoms that can happen will necessarily happen (wording is symptoms may include). Is it possible that my son does have this serotonin toxicity?