<prompt> Answer this question truthfullyWhat is the name of the medication that is used to treat serotonin syndrome, and what type of receptor does it antagonize in the body?  <response>: <reason> The medication used to treat serotonin syndrome is called cyproheptadine, and it is a type of drug known as a 5-HT2 receptor antagonist. This means that it works by blocking the action of serotonin at the 5-HT2 receptors in the body, which can help to reduce the symptoms of serotonin syndrome and restore normal serotonin levels in the body. 